:root {
    --header-bg: #536979;
    --header-bg-dark: #435866;
    --navy: #082d49;
    --navy-2: #0f415f;
    --sky: #0795d2;
    --orange: #f79327;
    --gold: #ffca35;
    --ink: #172630;
    --muted: #5f707b;
    --soft: #f2f6f8;
    --line: #dbe4e9;
    --white: #fff;
    --radius: 22px;
    --shadow: 0 18px 55px rgba(6, 45, 73, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--white);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}
body.no-scroll { overflow: hidden; }
img { max-width: 100%; display: block; }
button { font: inherit; }
a { color: inherit; }

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
    left: 16px; top: 16px; z-index: 1000;
    background: white; padding: 12px 16px; border-radius: 8px;
}

/* HEADER */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--header-bg);
    border-bottom: 1px solid rgba(255,255,255,.14);
    box-shadow: 0 8px 24px rgba(8, 27, 39, .13);
}
.header-inner {
    min-height: 92px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}
.brand {
    display: block;
    width: min(430px, 43vw);
    text-decoration: none;
}
.brand img {
    width: 100%;
    height: auto;
    display: block;
    /* Same blue-grey field as header, so the horizontal logo feels integrated. */
}
.main-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 19px;
}
.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: .93rem;
    white-space: nowrap;
}
.main-nav a:hover { color: #ffe177; }
.nav-cta {
    background: #fff;
    color: var(--navy) !important;
    padding: 10px 16px;
    border-radius: 999px;
}
.nav-toggle {
    display: none;
    border: 0;
    background: transparent;
    padding: 8px;
}
.nav-toggle span:not(.sr-only) {
    display: block;
    width: 26px; height: 2px;
    background: white;
    margin: 5px 0;
}

/* TYPOGRAPHY */
.eyebrow {
    margin: 0 0 10px;
    text-transform: uppercase;
    letter-spacing: .13em;
    font-weight: 850;
    color: var(--sky);
    font-size: .78rem;
}
.eyebrow.light { color: #8bdcff; }
h1, h2, h3 {
    color: var(--navy);
    line-height: 1.08;
    margin-top: 0;
}
h1 {
    font-size: clamp(3rem, 5vw, 5.6rem);
    letter-spacing: -.055em;
    margin-bottom: 24px;
}
h2 {
    font-size: clamp(2rem, 3.6vw, 3.45rem);
    letter-spacing: -.042em;
    margin-bottom: 20px;
}
h3 { font-size: 1.25rem; margin-bottom: 10px; }

/* HERO */
.hero {
    overflow: hidden;
    position: relative;
    padding: 78px 0 82px;
    background:
        radial-gradient(circle at 0% 20%, rgba(7,149,210,.14), transparent 28%),
        radial-gradient(circle at 88% 7%, rgba(255,202,53,.23), transparent 23%),
        linear-gradient(180deg, #f8fbfd, #fff);
}
.hero-grid {
    display: grid;
    grid-template-columns: .88fr 1.12fr;
    align-items: center;
    gap: 64px;
}
.lead {
    max-width: 680px;
    color: #405360;
    font-size: clamp(1.08rem, 1.7vw, 1.27rem);
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 30px;
}
.hero-note {
    color: var(--muted);
    font-size: .95rem;
    margin-top: 18px;
}
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 50px;
    padding: 0 23px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 820;
    transition: .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
    background: linear-gradient(135deg, var(--orange), #ef6f2e);
    color: white;
    box-shadow: 0 10px 25px rgba(247,147,39,.28);
}
.btn-secondary {
    background: white;
    border: 1px solid var(--line);
    color: var(--navy);
}
.btn-light { background: white; color: var(--navy); }

.hero-collage {
    min-height: 570px;
    position: relative;
}
.photo-card {
    border: 0;
    padding: 0;
    background: transparent;
    cursor: zoom-in;
    overflow: hidden;
    border-radius: 24px;
    box-shadow: var(--shadow);
}
.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
}
.photo-card:hover img { transform: scale(1.025); }
.hero-main {
    position: absolute;
    inset: 20px 80px 20px 0;
}
.hero-small {
    position: absolute;
    right: 0;
    width: 43%;
    height: 43%;
    border: 7px solid white;
}
.hero-top { top: 0; }
.hero-bottom { bottom: 0; }

/* SECTIONS */
.section { padding: 92px 0; }
.section-soft { background: var(--soft); }

.two-col {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: 70px;
}
.prose p {
    color: #465864;
    font-size: 1.08rem;
    margin-top: 0;
}

.feature-photo {
    padding: 22px 0 92px;
}
.feature-photo-grid {
    display: grid;
    grid-template-columns: 1.35fr .65fr;
    align-items: center;
    gap: 48px;
    background: var(--navy);
    border-radius: 30px;
    overflow: hidden;
    box-shadow: var(--shadow);
}
.feature-image {
    border: 0;
    background: transparent;
    padding: 0;
    cursor: zoom-in;
    height: 440px;
}
.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.feature-copy {
    padding: 44px 44px 44px 0;
    color: white;
}
.feature-copy h2 { color: white; }
.feature-copy p { color: #d9e6ee; }
.text-link {
    color: #ffd166;
    font-weight: 800;
    text-decoration: none;
}

.cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 36px;
}
.card {
    background: white;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
    box-shadow: 0 8px 24px rgba(8,45,73,.05);
}
.card-number {
    width: 44px; height: 44px;
    display: grid; place-items: center;
    border-radius: 50%;
    background: #e9f7fc;
    color: var(--sky);
    font-weight: 900;
    margin-bottom: 27px;
}
.card p { color: var(--muted); }

.section-heading,
.gallery-heading {
    display: grid;
    grid-template-columns: 1fr .8fr;
    gap: 50px;
    align-items: end;
    margin-bottom: 34px;
}
.section-heading > p,
.gallery-heading > p {
    color: var(--muted);
    margin: 0 0 12px;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}
.activity {
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--line);
    background: white;
    border-radius: 16px;
    padding: 18px 20px;
    font-weight: 760;
}
.activity-icon { font-size: 1.4rem; }

/* GALLERY */
.gallery-section {
    background: #f7fafb;
    padding-top: 84px;
}
.photo-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 230px;
    gap: 12px;
}
.gallery-item {
    border: 0;
    padding: 0;
    background: #d9e2e7;
    overflow: hidden;
    border-radius: 16px;
    cursor: zoom-in;
}
.gallery-item.wide { grid-column: span 2; }
.gallery-item.tall { grid-row: span 2; }
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease, filter .35s ease;
}
.gallery-item:hover img {
    transform: scale(1.035);
    filter: saturate(1.05);
}

/* PARTICIPATION */
.section-dark {
    color: white;
    background:
        radial-gradient(circle at 90% 0%, rgba(7,149,210,.24), transparent 28%),
        linear-gradient(135deg, #072a43, #0b3c5a);
}
.section-dark h2, .section-dark h3 { color: white; }
.participation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.participation p { color: #d8e6ef; }
.rules-box {
    border: 1px solid rgba(255,255,255,.17);
    background: rgba(255,255,255,.07);
    border-radius: 24px;
    padding: 30px;
}
.rules-box ul { padding-left: 22px; margin: 0; }
.rules-box li { margin: 10px 0; color: #e8f1f6; }

/* FAQ */
.faq-wrap {
    display: grid;
    grid-template-columns: .72fr 1.28fr;
    gap: 70px;
}
.faq-list details {
    border-top: 1px solid var(--line);
    padding: 18px 0;
}
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary {
    cursor: pointer;
    color: var(--navy);
    font-weight: 800;
    font-size: 1.07rem;
}
.faq-list p { color: var(--muted); }

/* CTA & FOOTER */
.final-cta {
    padding: 62px 0;
    background: linear-gradient(90deg, #fff8e8, #eef9fd);
}
.final-cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 34px;
}
.final-cta h2 { margin-bottom: 0; max-width: 840px; }

.site-footer {
    background: var(--header-bg-dark);
    color: #e5edf2;
    padding: 30px 0;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
}
.footer-logo { width: 310px; max-width: 45vw; }
.footer-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: flex-end;
    font-size: .9rem;
}

/* LIGHTBOX */
.lightbox[hidden] { display: none; }
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: grid;
    place-items: center;
    padding: 50px;
    background: rgba(3, 16, 25, .92);
}
.lightbox img {
    max-width: min(1500px, 94vw);
    max-height: 88vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 70px rgba(0,0,0,.4);
}
.lightbox-close {
    position: fixed;
    top: 14px;
    right: 20px;
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.13);
    color: white;
    font-size: 2.1rem;
    line-height: 1;
    cursor: pointer;
}

/* RESPONSIVE */
@media (max-width: 1080px) {
    .main-nav {
        position: absolute;
        left: 20px; right: 20px; top: 84px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 15px;
        border-radius: 18px;
        background: var(--header-bg-dark);
        box-shadow: var(--shadow);
    }
    .main-nav.is-open { display: flex; }
    .main-nav a { padding: 10px 12px; }
    .nav-toggle { display: block; }
    .brand { width: min(420px, 70vw); }
    .hero-grid,
    .two-col,
    .feature-photo-grid,
    .participation,
    .faq-wrap,
    .section-heading,
    .gallery-heading {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .feature-copy { padding: 0 34px 36px; }
    .feature-image { height: 430px; }
    .cards { grid-template-columns: repeat(2, 1fr); }
    .activity-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-collage { min-height: 520px; }
    .photo-gallery { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 700px) {
    .container { width: min(100% - 28px, 1180px); }
    .header-inner { min-height: 76px; }
    .brand { width: min(340px, 75vw); }
    .hero { padding: 52px 0 64px; }
    .section { padding: 68px 0; }
    .hero-collage { min-height: 410px; }
    .hero-main { inset: 18px 54px 18px 0; }
    .hero-small { width: 45%; border-width: 4px; }
    .feature-image { height: 330px; }
    .cards,
    .activity-grid,
    .final-cta-inner {
        grid-template-columns: 1fr;
    }
    .photo-gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 180px;
    }
    .gallery-item.wide { grid-column: span 2; }
    .gallery-item.tall { grid-row: span 1; }
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .footer-logo { max-width: 90%; }
    .footer-meta { justify-content: flex-start; }
    .lightbox { padding: 18px; }
}