/* intro.php — Bus Fleet Software product landing page */
:root {
    --bfs-navy: #002b5c;
    --bfs-navy-deep: #001a38;
    --bfs-blue: #0a4fa3;
    --bfs-sky: #eaf3fb;
    --bfs-ink: #122033;
    --bfs-muted: #4a5a6e;
    --bfs-line: rgba(0, 43, 92, 0.15);
    --bfs-paper: #f4f7fa;
    --bfs-white: #ffffff;
    --font-display: "Barlow Condensed", "Arial Narrow", Impact, sans-serif;
    --font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.intro-page {
    margin: 0;
    color: var(--bfs-ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.55;
    background: var(--bfs-white);
    -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a:focus-visible, button:focus-visible { outline: 3px solid #2a7bc7; outline-offset: 3px; }

.intro-hero {
    position: relative;
    overflow: hidden;
    color: var(--bfs-ink);
    background: linear-gradient(145deg, #fff 0%, #f7faff 60%, #eaf3fb 100%);
    border-bottom: 4px solid var(--bfs-navy);
}
.intro-hero::after {
    content: "";
    position: absolute;
    right: -170px;
    bottom: -280px;
    width: 580px;
    height: 580px;
    border: 72px solid rgba(0, 43, 92, 0.055);
    border-radius: 50%;
}
.intro-hero-inner {
    position: relative;
    z-index: 1;
    width: min(960px, 92vw);
    margin: 0 auto;
    padding: 18px 0 48px;
    text-align: center;
    animation: intro-rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.intro-logo { width: min(290px, 70vw); margin: 0 auto 8px; }
.intro-eyebrow, .intro-section-label {
    margin: 0 0 9px;
    color: var(--bfs-blue);
    font-family: var(--font-display);
    font-size: 0.98rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}
.intro-headline {
    margin: 0 auto 16px;
    color: var(--bfs-navy);
    font-family: var(--font-display);
    font-size: clamp(2.45rem, 5.5vw, 4.35rem);
    font-weight: 800;
    letter-spacing: 0.005em;
    line-height: 0.96;
}
.intro-lead {
    max-width: 47em;
    margin: 0 auto 8px;
    color: var(--bfs-muted);
    font-size: clamp(1.04rem, 1.8vw, 1.22rem);
}
.intro-audience { margin: 0 auto 24px; color: var(--bfs-navy); font-weight: 700; }
.intro-cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.intro-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border: 2px solid var(--bfs-navy);
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 1.02rem;
    font-weight: 700;
    letter-spacing: 0.055em;
    line-height: 1.1;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.intro-btn:hover { transform: translateY(-2px); }
.intro-btn-primary { background: var(--bfs-navy); color: #fff; }
.intro-btn-primary:hover { background: var(--bfs-blue); border-color: var(--bfs-blue); }
.intro-btn-secondary { background: #fff; color: var(--bfs-navy); }
.intro-btn-secondary:hover { background: var(--bfs-sky); }

.intro-overview, .intro-outcomes, .intro-features, .intro-navigator, .intro-credibility {
    padding: clamp(48px, 7vw, 84px) 0;
}
.intro-overview { background: #fff; border-bottom: 1px solid var(--bfs-line); }
.intro-overview-inner {
    width: min(1180px, 92vw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
}
.intro-overview-shot { margin: 0; }
.intro-overview-shot img { width: 100%; border: 3px solid var(--bfs-navy); box-shadow: 0 18px 40px rgba(0, 26, 56, 0.15); }
.intro-shot-open { display: block; width: 100%; padding: 0; border: 0; background: transparent; cursor: zoom-in; line-height: 0; }
.intro-shot-hint { margin: 11px 0 0; color: var(--bfs-muted); font-size: 0.88rem; text-align: center; }
.intro-h2 {
    margin: 0 0 14px;
    color: var(--bfs-navy);
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.02;
}
.intro-copy { max-width: 42em; margin: 0; color: var(--bfs-muted); font-size: 1.06rem; }
.intro-highlight-list { margin: 22px 0 0; padding: 0; list-style: none; }
.intro-highlight-list li { position: relative; margin: 10px 0; padding-left: 28px; font-weight: 600; }
.intro-highlight-list li::before { content: "✓"; position: absolute; left: 0; color: var(--bfs-blue); font-weight: 800; }

.intro-outcomes { background: var(--bfs-paper); }
.intro-section-heading { width: min(920px, 92vw); margin: 0 auto 34px; text-align: center; }
.intro-outcomes-grid { width: min(1180px, 92vw); margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.intro-outcome-card { position: relative; min-height: 245px; padding: 26px 22px; background: #fff; border-top: 4px solid var(--bfs-navy); box-shadow: 0 8px 24px rgba(0, 43, 92, 0.07); }
.intro-card-number { color: rgba(0, 43, 92, 0.2); font-family: var(--font-display); font-size: 2.4rem; font-weight: 800; line-height: 1; }
.intro-outcome-card h3 { margin: 16px 0 8px; color: var(--bfs-navy); font-family: var(--font-display); font-size: 1.45rem; line-height: 1.05; }
.intro-outcome-card p { margin: 0; color: var(--bfs-muted); font-size: 0.97rem; }

.intro-features { background: #fff; }
.intro-features-inner { width: min(1100px, 92vw); margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.intro-feature-block { padding: 22px 22px 24px; background: #fff; border: 1px solid var(--bfs-line); border-left: 5px solid var(--bfs-navy); }
.intro-feature-title { margin: 0 0 12px; padding-bottom: 9px; border-bottom: 2px solid var(--bfs-navy); color: var(--bfs-navy); font-family: var(--font-display); font-size: 1.24rem; font-weight: 800; letter-spacing: 0.035em; text-transform: uppercase; }
.intro-feature-list { margin: 0; padding-left: 1.15em; font-size: 0.97rem; }
.intro-feature-list li { margin-bottom: 0.42em; }
.intro-feature-list li:last-child { margin-bottom: 0; }

.intro-coverage { padding: clamp(42px, 6vw, 66px) 0; background: var(--bfs-navy); color: #fff; }
.intro-coverage-inner { width: min(1100px, 92vw); margin: 0 auto; display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 50px; align-items: center; }
.intro-section-label-light { color: #a9d5ff; }
.intro-h2-light { color: #fff; }
.intro-coverage p:last-child { margin: 0; color: #e1edf8; font-size: 1.08rem; }

.intro-navigator { background: var(--bfs-sky); }
.intro-navigator-inner { width: min(1050px, 92vw); margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: center; }
.intro-credibility { background: #fff; text-align: center; }
.intro-credibility-inner { width: min(800px, 92vw); margin: 0 auto; }
.intro-credibility .intro-copy { margin: 0 auto; }

.intro-close { padding: clamp(48px, 7vw, 76px) 0; background: var(--bfs-navy-deep); color: #fff; text-align: center; }
.intro-close-inner { width: min(760px, 92vw); margin: 0 auto; }
.intro-close p:not(.intro-section-label) { margin: 0 auto 25px; color: #dce9f6; font-size: 1.08rem; }
.intro-btn-light { background: #fff; border-color: #fff; color: var(--bfs-navy); }
.intro-btn-light:hover { background: var(--bfs-sky); }
.intro-btn-link-light { border-color: #9dc8ee; color: #fff; }
.intro-btn-link-light:hover { background: rgba(255,255,255,0.09); }

.intro-footer { padding: 28px 16px; background: #fff; color: var(--bfs-navy); text-align: center; border-top: 1px solid var(--bfs-line); }
.intro-footer p { margin: 3px 0; }
.intro-footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; margin: 15px 0; }
.intro-footer a { color: var(--bfs-navy); font-weight: 700; text-decoration: none; }
.intro-footer a:hover { text-decoration: underline; }
.intro-copyright { color: var(--bfs-muted); font-size: 0.87rem; }

body.intro-lightbox-open { overflow: hidden; }
.intro-lightbox { position: fixed; inset: 0; z-index: 4000; display: flex; align-items: center; justify-content: center; padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); background: rgba(0, 20, 43, 0.82); }
.intro-lightbox[hidden] { display: none !important; }
.intro-lightbox-panel { width: min(1200px, 100%); max-height: 100%; display: flex; flex-direction: column; overflow: hidden; background: #fff; border: 3px solid var(--bfs-navy); }
.intro-lightbox-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border-bottom: 2px solid var(--bfs-navy); }
.intro-lightbox-title { margin: 0; color: var(--bfs-navy); font-family: var(--font-display); font-size: 1.15rem; text-transform: uppercase; }
.intro-lightbox-close { flex: 0 0 auto; width: 44px; height: 44px; border: 2px solid var(--bfs-navy); border-radius: 6px; background: #fff; color: var(--bfs-navy); font-size: 1.35rem; cursor: pointer; }
.intro-lightbox-body { flex: 1 1 auto; overflow: auto; padding: 12px; background: var(--bfs-paper); -webkit-overflow-scrolling: touch; }
.intro-lightbox-body img { width: 100%; border: 1px solid var(--bfs-line); }
.intro-lightbox-actions { display: flex; justify-content: center; padding: 12px; border-top: 1px solid var(--bfs-line); }

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.5s ease, transform 0.5s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
@keyframes intro-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (max-width: 940px) {
    .intro-outcomes-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-outcome-card { min-height: 0; }
}

@media (max-width: 760px) {
    body.intro-page { font-size: 16px; }
    .intro-hero-inner { width: 100%; padding: 14px max(18px, env(safe-area-inset-right)) 36px max(18px, env(safe-area-inset-left)); }
    .intro-logo { width: min(220px, 62vw); }
    .intro-headline { font-size: clamp(2.2rem, 11vw, 3.25rem); }
    .intro-cta-row { width: min(360px, 100%); margin-left: auto; margin-right: auto; flex-direction: column; }
    .intro-btn { width: 100%; min-height: 50px; padding: 8px 16px; }
    .intro-overview-inner, .intro-coverage-inner, .intro-navigator-inner { grid-template-columns: 1fr; gap: 28px; }
    .intro-overview-copy { order: -1; }
    .intro-outcomes-grid, .intro-features-inner { grid-template-columns: 1fr; }
    .intro-navigator .intro-btn { width: min(360px, 100%); }
    .intro-footer-links { flex-direction: column; gap: 7px; }
}

@media (max-width: 430px) {
    .intro-outcomes-grid { width: calc(100% - 28px); }
    .intro-feature-block { padding: 18px 16px 20px; }
    .intro-overview, .intro-outcomes, .intro-features, .intro-navigator, .intro-credibility { padding: 42px 0; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .intro-hero-inner, [data-reveal] { animation: none !important; transition: none !important; opacity: 1 !important; transform: none !important; }
    .intro-btn:hover { transform: none; }
}