/* ===== GLOBAL CALCULATOR BASE ===== */
body.calculator-page {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    line-height: 1.6;
}

.calculator-page * { box-sizing: border-box; }

.calculator-page .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.calculator-page .hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.calculator-page .hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.calculator-page .hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.calculator-page .card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

.calculator-page .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.calculator-page .calc-box { background: #fafcff; border: 1px solid #dbe7f3; border-radius: 10px; padding: 20px; }
.calculator-page .time-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.calculator-page label { display: block; font-weight: bold; margin-bottom: 6px; color: #23384d; }
.calculator-page input, .calculator-page select { width: 100%; padding: 12px; border: 1px solid #c9d6e2; border-radius: 6px; box-sizing: border-box; font-size: 16px; }
.calculator-page button { padding: 12px 22px; background-color: #0077cc; color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: 16px; font-weight: bold; margin-top: 6px; margin-right: 8px; }
.calculator-page button:hover { background-color: #005fa3; }
.calculator-page .result { margin-top: 18px; padding: 14px; background: #fef3f3; border: 1px solid #f3c0c0; border-radius: 8px; font-size: 1.1rem; font-weight: bold; color: #c62828; min-height: 24px; }
.calculator-page .formula-box, .calculator-page .info-box { background: #f0f7ff; border-left: 5px solid #0077cc; padding: 16px; border-radius: 8px; margin-top: 16px; }
.calculator-page .warning { background: #fff8e1; border-left: 5px solid #f0ad4e; padding: 15px; margin-top: 15px; border-radius: 6px; }
.calculator-page .helper-text { font-size: .95rem; color: #51606f; margin-top: 6px; }
.calculator-page .content-section p, .calculator-page .content-section li { color: #334; }
.calculator-page .faq-item { margin-bottom: 18px; }

@media (max-width: 900px) {
    .calculator-page .calc-grid, .calculator-page .time-grid { grid-template-columns: 1fr; }
    .calculator-page .hero h1 { font-size: 1.8rem; }
    .calculator-page .card { padding: 18px; }
    .calculator-page button { width: 100%; margin-right: 0; margin-bottom: 10px; }
}


/* ===== accelerate-stop-distance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== alternate-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== best-glide-speed.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== calibrated-airspeed.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    margin: 0;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 24px;
}

.hero {
    background: #eef5fb;
    text-align: center;
    padding: 40px 20px;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    margin-top: 24px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
}

.form-group {
    margin-bottom: 16px;
}

label {
    font-weight: bold;
    display: block;
    margin-bottom: 6px;
}

input {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #ccc;
}

button {
    background: #0077cc;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

.result {
    margin-top: 15px;
    font-weight: bold;
    color: #c62828;
}

/* ===== climb-gradient.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== climb-performance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== climb-rate-time-to-climb.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== cloud-base.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== compass-deviation.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== contingency-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== crosswind-component.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
    line-height: 1.25;
}

.hero p {
    max-width: 740px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
    line-height: 1.25;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
    line-height: 1.25;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

input[type="number"]:focus,
button:focus,
a:focus {
    outline: 3px solid #99c9ff;
    outline-offset: 2px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #eef7ff;
    border: 1px solid #bfdcff;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #0b4f8a;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.cta-links a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
}

.cta-links a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== crosswind-headwind.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== density-altitude.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.cta-links a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
}

.cta-links a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== density-ratio.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    padding: 40px 20px;
    text-align: center;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
}

input {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #c9d6e2;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border-radius: 8px;
    color: #c62828;
    font-weight: bold;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== descent-gradient.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== descent-rate.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== dew-point-spread.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== emergency-descent.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== endurance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== equal-time-point.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== fatigue-estimator.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.status-low {
    color: #2e7d32;
}
.status-medium {
    color: #ef6c00;
}
.status-high {
    color: #c62828;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== flight-category.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== fog-probability-dewpoint-spread.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== frost-point.php legacy styles ===== */
body { font-family: Arial; background:#f5f7fb; margin:0; color:#222; }
.container { max-width:1000px; margin:auto; padding:20px; }
.hero { text-align:center; padding:40px 10px; background:#eef5fb; }
.card { background:#fff; padding:20px; border-radius:10px; margin-top:20px; box-shadow:0 3px 10px rgba(0,0,0,0.08); }

input, select {
    width:100%;
    padding:12px;
    margin-top:6px;
    margin-bottom:14px;
    border:1px solid #ccc;
    border-radius:6px;
}

button {
    padding:12px;
    background:#0077cc;
    color:#fff;
    border:none;
    border-radius:6px;
    font-weight:bold;
    cursor:pointer;
}

button:hover { background:#005fa3; }

.result {
    margin-top:15px;
    padding:12px;
    background:#fef3f3;
    border:1px solid #f3c0c0;
    border-radius:6px;
    font-weight:bold;
    color:#c62828;
}

.info-box {
    background:#f0f7ff;
    padding:15px;
    border-left:5px solid #0077cc;
    margin-top:15px;
    border-radius:6px;
}

.warning {
    background:#fff8e1;
    border-left:5px solid #f0ad4e;
    padding:15px;
    margin-top:15px;
    border-radius:6px;
}

/* ===== fuel-burn.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== fuel-on-board.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== fuel-planner.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== fuel-remaining.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== glide-distance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== glide-ratio.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== groundspeed.php legacy styles ===== */
body { font-family: Arial; background:#f5f7fb; margin:0; }
.container { max-width:1100px; margin:auto; padding:24px; }
.hero { background:#eef5fb; padding:40px; text-align:center; }
.hero h1 { color:#0b2239; }
.card { background:#fff; padding:24px; border-radius:12px; margin-top:24px; }
.form-group { margin-bottom:16px; text-align:left; }
label { font-weight:bold; }
input { width:100%; padding:10px; border-radius:6px; border:1px solid #ccc; }
button { background:#0077cc; color:#fff; padding:12px; border:none; border-radius:6px; cursor:pointer; }
button:hover { background:#005fa3; }
.result { margin-top:15px; padding:12px; background:#fef3f3; color:#c62828; font-weight:bold; border-radius:6px; }

/* ===== headwind-component.php legacy styles ===== */
body {font-family: Arial, sans-serif; background:#f5f7fb; margin:0;}
.container {max-width:1100px; margin:auto; padding:24px;}
.hero {background:#eef5fb; padding:40px; text-align:center;}
.card {background:#fff; padding:24px; border-radius:12px; margin-top:24px; box-shadow:0 3px 12px rgba(0,0,0,0.08);}
.form-group {margin-bottom:16px;}
input {width:100%; padding:12px; border-radius:6px; border:1px solid #ccc;}
button {padding:12px 22px; background:#0077cc; color:#fff; border:none; border-radius:6px; cursor:pointer;}
button:hover {background:#005fa3;}
.result {margin-top:18px; padding:14px; background:#fef3f3; border-radius:8px; color:#c62828; font-weight:bold;}
.helper-text {font-size:0.9rem; color:#51606f;}

/* ===== heat-index.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== holding-entry.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== holding-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== holding-pattern-timing-correction.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.preset-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.preset-row button {
    margin: 0;
    flex: 1 1 180px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    .preset-row button {
        width: 100%;
    }
}

/* ===== holding.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== hydroplane-speed.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== hypothermia.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.status-low { color: #2e7d32; }
.status-medium { color: #ef6c00; }
.status-high { color: #c62828; }
.status-severe { color: #8e0000; }

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== intercept-angle.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== isa-deviation.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
}

/* ===== isa-temperature.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.cta-links a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
}

.cta-links a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== landing-distance-estimator.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== landing-safety-margin.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== load-factor.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== mac.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== mach-number.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-weight: bold;
    color: #c62828;
}

/* ===== magnetic-variation.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== missed-approach-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== moment.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== night-currency-helper.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
input[type="date"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== ozone-risk.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.status-good { color: #2e7d32; }
.status-moderate { color: #ef6c00; }
.status-usg { color: #d17d00; }
.status-unhealthy { color: #c62828; }
.status-very-unhealthy { color: #7b1fa2; }
.status-hazardous { color: #8e0000; }

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== percent-mac.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.tab-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.tab-buttons button {
    margin: 0;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    .tab-buttons button {
        width: 100%;
    }
}

/* ===== point-of-no-return.php legacy styles ===== */
body {font-family: Arial, sans-serif; background:#f5f7fb; margin:0;}
.container {max-width:1100px; margin:auto; padding:24px;}
.hero {background:#eef5fb; text-align:center; padding:40px;}
.card {background:#fff; padding:24px; border-radius:12px; margin-top:24px; box-shadow:0 3px 12px rgba(0,0,0,0.08);}
.form-group {margin-bottom:16px;}
input {width:100%; padding:12px; border-radius:6px; border:1px solid #ccc;}
button {padding:12px 22px; background:#0077cc; color:#fff; border:none; border-radius:6px; cursor:pointer;}
button:hover {background:#005fa3;}
.result {margin-top:18px; padding:14px; background:#fef3f3; border-radius:8px; color:#c62828; font-weight:bold;}

/* ===== pressure-altitude.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.cta-links a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
}

.cta-links a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== procedure-turn.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.preset-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.preset-row button {
    margin: 0;
    flex: 1 1 180px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    .preset-row button {
        width: 100%;
    }
}

/* ===== range.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== relative-humidity.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== reserve-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== runway-length-required.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== runway-slope.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== stall-speed.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== standard-rate-turn-bank-angle.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== sunrise-sunset.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
input[type="date"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== takeoff-distance-estimator.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== taxi-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== temperature-conversion.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== time-speed-distance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== timed-turn.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.preset-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.preset-row button {
    margin: 0;
    flex: 1 1 180px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    .preset-row button {
        width: 100%;
    }
}

/* ===== top-of-descent.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== trip-fuel.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.time-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .time-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== true-airspeed.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.cta-links a {
    color: #0077cc;
    text-decoration: none;
    font-weight: bold;
}

.cta-links a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== true-course.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== turn-radius-rate-of-turn.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== weight-and-balance.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 840px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2, h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 10px 8px;
    border-bottom: 1px solid #dbe7f3;
    text-align: left;
    vertical-align: middle;
}

th {
    background: #f0f7ff;
    color: #1f2d3d;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 15px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 14px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.93rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

.small-note {
    font-size: 0.92rem;
    color: #51606f;
    margin-top: 10px;
}

@media (max-width: 950px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== weight-shift-cg.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    background: #fff;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
    margin-right: 8px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.warning-box {
    background: #fff8e1;
    border-left: 5px solid #f0ad4e;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    color: #5c4700;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* ===== wind-chill.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}

/* ===== wind-correction-angle.php legacy styles ===== */
body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.hero {
    background: #eef5fb;
    color: #1f2d3d;
    padding: 40px 20px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
    color: #0b2239;
}

.hero p {
    max-width: 820px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    padding: 24px;
    margin-top: 24px;
}

h2 {
    color: #1f2d3d;
    margin-top: 0;
}

h3 {
    color: #1f2d3d;
    margin-top: 0;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.calc-box {
    background: #fafcff;
    border: 1px solid #dbe7f3;
    border-radius: 10px;
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    color: #23384d;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #c9d6e2;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 22px;
    background-color: #0077cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    margin-top: 6px;
}

button:hover {
    background-color: #005fa3;
}

.result {
    margin-top: 18px;
    padding: 14px;
    background: #fef3f3;
    border: 1px solid #f3c0c0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #c62828;
    min-height: 24px;
}

.helper-text {
    font-size: 0.95rem;
    color: #51606f;
    margin-top: 6px;
}

.content-section p,
.content-section li {
    color: #334;
}

.formula-box {
    background: #f0f7ff;
    border-left: 5px solid #0077cc;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item h3 {
    margin-bottom: 6px;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 18px;
    }
}