:root {
    --brand: #2b4162;
    --brand-soft: rgba(43, 65, 98, 0.12);
    --brand-strong: rgba(43, 65, 98, 0.85);
    --bg: #f5f7fb;
    --text: #1a1c25;
    --muted: #5b6270;
    --surface: #ffffff;
    --border: rgba(43, 65, 98, 0.1);
    --radius-lg: 32px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --shadow-sm: 0 12px 40px rgba(43, 65, 98, 0.08);
    --shadow-lg: 0 24px 80px rgba(43, 65, 98, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at top right, rgba(43, 65, 98, 0.08), transparent 55%), var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: min(1120px, 92vw);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(14px);
    background: rgba(245, 247, 251, 0.85);
    border-bottom: 1px solid rgba(43, 65, 98, 0.08);
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
    gap: 24px;
}

.brand {
    display: flex;
    flex-direction: column;
    font-weight: 700;
    color: var(--brand);
    letter-spacing: 0.04em;
}

.brand-sub {
    font-size: 12px;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.primary-nav {
    display: flex;
    gap: 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--muted);
}

.primary-nav a {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease, color 0.2s ease;
}

.primary-nav a:hover {
    background: var(--brand-soft);
    color: var(--brand);
    text-decoration: none;
}

.header-actions {
    display: flex;
    gap: 12px;
}

.primary-button,
.ghost-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    padding: 12px 22px;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
}

.primary-button {
    background: linear-gradient(135deg, var(--brand), #3a588a);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.primary-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.ghost-button {
    border-color: var(--brand);
    color: var(--brand);
    background: rgba(255, 255, 255, 0.8);
}

.ghost-button:hover {
    background: var(--brand);
    color: #fff;
    text-decoration: none;
}

.hero {
    padding: 120px 0 80px;
}

.hero-grid {
    display: grid;
    gap: 48px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    align-items: center;
}

.hero-copy h1 {
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1.05;
    margin-bottom: 24px;
    color: var(--brand);
}

.hero-copy .lead {
    font-size: 18px;
    color: var(--muted);
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.hero-card::after {
    content: '';
    position: absolute;
    inset: 12px;
    border-radius: var(--radius-md);
    border: 1px dashed rgba(43, 65, 98, 0.16);
}

.hero-card__top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
    margin-bottom: 24px;
}

.hero-badge {
    background: rgba(43, 65, 98, 0.08);
    color: var(--brand);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}

.hero-metric {
    font-weight: 700;
    color: var(--brand);
}

.hero-card__body {
    position: relative;
    z-index: 1;
    color: var(--muted);
}

.hero-card__body ul {
    padding-left: 18px;
    margin: 16px 0 0;
}

.db-warning {
    margin-top: 36px;
    background: rgba(210, 75, 90, 0.1);
    border: 1px solid rgba(210, 75, 90, 0.2);
    padding: 18px;
    border-radius: var(--radius-md);
    color: #9f1c31;
}

.metrics {
    padding: 80px 0;
}

.metrics h2,
.features h2,
.airlines h2,
.faq h2,
.cta-banner h2 {
    font-size: clamp(28px, 3vw, 36px);
    color: var(--brand);
    margin-bottom: 12px;
}

.metrics p,
.features p,
.airlines p,
.faq p,
.cta-banner p {
    color: var(--muted);
    max-width: 720px;
}

.metrics-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.metric-card {
    background: var(--surface);
    padding: 28px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.metric-card h3 {
    font-size: 32px;
    margin: 0 0 12px;
    color: var(--brand);
}

.features {
    padding: 80px 0;
}

.section-intro {
    max-width: 720px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 42px;
}

.feature-card {
    background: linear-gradient(145deg, rgba(43, 65, 98, 0.08), rgba(255, 255, 255, 0.9));
    padding: 32px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(43, 65, 98, 0.12);
    backdrop-filter: blur(6px);
}

.feature-card h3 {
    margin-top: 0;
    color: var(--brand);
}

.airlines {
    padding: 80px 0;
}

.airlines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    align-items: center;
}

.airline-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.airline-list span {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    color: var(--brand-strong);
    font-weight: 600;
}

.cta-banner {
    padding: 80px 0;
}

.banner-grid {
    background: linear-gradient(135deg, rgba(43, 65, 98, 0.9), #3a588a);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 48px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
    align-items: center;
    box-shadow: var(--shadow-lg);
}

.banner-grid .primary-button {
    justify-self: start;
    background: #fff;
    color: var(--brand);
    box-shadow: none;
}

.banner-grid .primary-button:hover {
    box-shadow: var(--shadow-sm);
}

.faq {
    padding: 80px 0 120px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.faq-item {
    background: var(--surface);
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.site-footer {
    background: #10131b;
    color: rgba(255, 255, 255, 0.86);
    padding: 48px 0;
}

.footer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.82);
}

.badge {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(43, 65, 98, 0.15);
    color: var(--brand);
    font-size: 12px;
    font-weight: 600;
}

@media (max-width: 768px) {
    .primary-nav {
        display: none;
    }

    .hero {
        padding-top: 80px;
    }

    .banner-grid {
        padding: 32px;
    }

    .footer-links {
        flex-direction: column;
        align-items: flex-start;
    }
}