/* ============================================
   EARTHLAB — Style Sheet v2
   Earth/climate palette: deep blues, greens, warm accents
   Enhanced: globe, countdown, stats, FAQ, dark programme
   ============================================ */

:root {
    /* 60% Dominant — deep teal backgrounds */
    --deep-ocean: #1a4a46;
    --ocean: #1f5b55;
    --ocean-mid: #267a6e;

    /* 30% Secondary — warm sandy neutrals */
    --sand: #e8dcc8;
    --sand-light: #f2ece0;
    --sand-dark: #d4c4a8;

    /* 10% Accent — bright seafoam teal */
    --teal: #3a9e8f;
    --teal-light: #5bbfad;
    --warm: #d4c4a8;
    --warm-light: #e8dcc8;

    --ice: #f2ece0;
    --white: #ffffff;
    --text: #1a3330;
    --text-light: #3d5a54;
    --text-muted: #6b8f87;

    /* Color-coded day types */
    --color-welcome: #7c6f5b;
    --color-lecture: #2a7565;
    --color-hack: #7dd4c0;
    --color-final: #d4c4a8;

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-mono: 'Space Mono', monospace;

    --section-padding: clamp(4rem, 8vw, 8rem);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    background: var(--white);
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

/* Skip-to-content link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--teal);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 0 0 8px 8px;
    z-index: 10000;
    font-size: 0.85rem;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--teal-light);
    outline-offset: 2px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

/* ============================================
   Navigation
   ============================================ */

#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

#navbar.scrolled {
    background: rgba(26, 74, 70, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo-img {
    height: 44px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    align-items: center;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.nav-cta {
    background: var(--sand) !important;
    color: var(--deep-ocean) !important;
    padding: 0.5rem 1.25rem !important;
    border-radius: 6px !important;
    margin-left: 0.5rem !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--sand-light) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ============================================
   Hero
   ============================================ */

#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #13352f 0%, var(--deep-ocean) 30%, var(--ocean) 60%, var(--ocean-mid) 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(26, 107, 90, 0.3) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(233, 168, 32, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(15, 40, 71, 0.5) 0%, transparent 60%);
}

/* About section layout */
.about-layout {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin: 2rem auto 3rem;
    max-width: 900px;
}

.about-text {
    flex: 1;
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-text p + p {
    margin-top: 1rem;
}

.about-illustration {
    flex: 0 0 300px;
}

.about-illustration img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

/* Hero layout — centred text + globe side by side */
.hero-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    min-height: 100vh;
    position: relative;
    z-index: 2;
}

/* Three.js Globe */
#globe-canvas {
    flex: 0 0 45%;
    aspect-ratio: 1;
    max-width: 580px;
    pointer-events: none;
}

#globe-canvas canvas {
    width: 100% !important;
    height: 100% !important;
    overflow: visible;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 2rem 0;
    max-width: 520px;
    flex: 0 1 520px;
}

.hero-tag {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--teal-light);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: clamp(3.5rem, 10vw, 6rem);
    letter-spacing: 0.08em;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.hero-title .accent {
    color: var(--teal-light);
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.02em;
}

.hero-desc {
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* Countdown Timer */
.deadline-notice {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.deadline-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.75);
}

.deadline-date {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--sand);
    color: var(--deep-ocean);
}

.btn-primary:hover {
    background: var(--sand-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(212, 196, 168, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: bob 2s ease-in-out infinite;
    z-index: 2;
}

.scroll-arrow {
    width: 1px;
    height: 30px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
}

@keyframes bob {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   Sections — General
   ============================================ */

.section {
    padding: var(--section-padding) 0;
}

.section-alt {
    background: var(--ice);
}

.section-dark {
    background: linear-gradient(180deg, var(--deep-ocean) 0%, var(--ocean) 100%);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--deep-ocean);
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
}

.section-title.light {
    color: var(--white);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--teal-light), var(--sand-dark));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section-intro {
    max-width: 750px;
    margin: 2rem auto 3rem;
    text-align: center;
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.8;
}

.section-intro.light {
    color: rgba(255, 255, 255, 0.85);
}

.section-intro p + p {
    margin-top: 1rem;
}

/* ============================================
   About — Highlights Grid
   ============================================ */

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.highlight-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    color: var(--teal-light);
}

.highlight-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--deep-ocean);
    margin-bottom: 0.5rem;
}

.highlight-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ============================================
   Programme — Dark Timeline with color coding
   ============================================ */

/* Programme two-column layout */
.programme-layout {
    display: flex;
    gap: 5rem;
    align-items: stretch;
    max-width: 1050px;
    margin: 0 auto;
    flex-direction: row;
}

.programme-layout > .timeline {
    flex: 1;
}

.programme-ridgeline {
    flex: 0 0 375px;
    align-self: stretch;
    margin-top: 0;
}

.programme-ridgeline svg {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}


.programme-legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-welcome { background: var(--color-welcome); }
.legend-lecture { background: var(--color-lecture); }
.legend-hack { background: var(--color-hack); }
.legend-final { background: var(--color-final); }

.section-dark .timeline::before {
    background: linear-gradient(to bottom, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
}

.section-dark .timeline-content {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(4px);
}

.section-dark .timeline-content h3 {
    color: var(--white);
}

.section-dark .timeline-content p {
    color: rgba(255, 255, 255, 0.8);
}

/* Color-coded timeline markers */
.timeline-item[data-type="welcome"] .timeline-day { background: var(--color-welcome); color: var(--white); }
.timeline-item[data-type="lecture"] .timeline-day { background: var(--color-lecture); color: var(--white); }
.timeline-item[data-type="hack"] .timeline-day { background: var(--color-hack); color: var(--white); }
.timeline-item[data-type="final"] .timeline-day { background: var(--color-final); color: var(--deep-ocean); }

/* Color-coded left borders */
.timeline-item[data-type="welcome"] .timeline-content { border-left: 3px solid var(--color-welcome); }
.timeline-item[data-type="lecture"] .timeline-content { border-left: 3px solid var(--color-lecture); }
.timeline-item[data-type="hack"] .timeline-content { border-left: 3px solid var(--color-hack); }
.timeline-item[data-type="final"] .timeline-content { border-left: 3px solid var(--color-final); }

.timeline {
    position: relative;
    max-width: 700px;
    margin: 3rem auto 0;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--teal-light), var(--warm), var(--teal-light));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 1rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -3rem;
    top: 0;
    transform: translateX(-50%);
}

.timeline-day {
    display: inline-block;
    background: var(--deep-ocean);
    color: var(--warm);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
    min-width: 5.5rem;
    text-align: center;
}

.timeline-content {
    background: var(--white);
    border-radius: 8px;
    padding: 0.8rem 1.25rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: transform 0.2s ease;
}

.timeline-content:hover {
    transform: translateX(4px);
}

.timeline-content h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--deep-ocean);
    margin-bottom: 0.2rem;
}

.timeline-content p {
    font-size: 0.82rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* ============================================
   Topics Grid
   ============================================ */

.topics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.topic-card {
    position: relative;
    background: linear-gradient(135deg, var(--deep-ocean), var(--ocean));
    color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.topic-card:hover {
    transform: translateY(-4px);
}

.topic-card::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -30%;
    width: 150px;
    height: 150px;
    background: rgba(42, 157, 143, 0.15);
    border-radius: 50%;
}

.topic-illustration {
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.2rem;
    position: relative;
    aspect-ratio: 5 / 3;
    background: #2a5c52;
}

.topic-illustration {
    transition: filter 0.3s ease;
}

.topic-illustration img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.topic-card:hover .topic-illustration {
    filter: brightness(1.15);
}

.topic-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    position: relative;
}

.topic-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    position: relative;
}

.warming-globes {
    margin-top: 3rem;
    text-align: center;
}

.warming-globes img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* ============================================
   Who Should Apply
   ============================================ */

.who-content {
    max-width: 1100px;
    margin: 2rem auto 0;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: flex-start;
    justify-content: center;
}

.who-illustration-left,
.who-illustration-right {
    flex: 0 0 180px;
    display: none;
    align-items: flex-end;
}

@media (min-width: 900px) {
    .who-illustration-left,
    .who-illustration-right {
        display: flex;
    }
}

.who-text {
    flex: 1;
    min-width: 280px;
}

.who-illustration-left img,
.who-illustration-right img {
    width: 100%;
    height: auto;
    opacity: 0.9;
}

.who-text {
    flex: 1;
}

.who-text p {
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

.perk-highlight {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: linear-gradient(135deg, rgba(78, 167, 138, 0.15), rgba(209, 175, 113, 0.1));
    border: 1px solid rgba(78, 167, 138, 0.3);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-top: 1.5rem;
}

.perk-highlight p {
    margin-bottom: 0;
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    align-items: flex-start;
    max-width: 1100px;
    margin: 2rem auto 0;
    padding-top: 1rem;
}

.faq-list {
    flex: 1;
    min-width: 280px;
}

.faq-illustration {
    flex: 0 0 456px;
    position: sticky;
    top: 6rem;
    display: none;
}

@media (min-width: 1000px) {
    .faq-illustration {
        display: block;
    }
}

.faq-figure {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.faq-item:first-child {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--deep-ocean);
    cursor: pointer;
    list-style: none;
    transition: color 0.2s;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--teal-light);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item[open] .faq-question::after {
    content: '\2212';
    transform: rotate(180deg);
}

.faq-question:hover {
    color: var(--teal-light);
}

.faq-answer {
    padding: 0 0 0.9rem;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ============================================
   Organisers
   ============================================ */

.organisers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.organiser-card {
    text-align: left;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.organiser-photo {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 0 1.25rem;
    border: 3px solid var(--teal-light);
    transition: transform 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
}

.organiser-photo:hover {
    transform: scale(1.05);
    border-color: var(--warm);
}

.organiser-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--deep-ocean);
    margin-bottom: 0.25rem;
}

.organiser-title {
    font-size: 0.85rem;
    color: var(--teal-light);
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.organiser-dept {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.organiser-bio {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 0.75rem;
    flex: 1;
}

.organiser-link {
    font-size: 0.85rem;
    color: var(--teal-light);
    font-weight: 600;
    transition: color 0.2s;
}

.organiser-link:hover {
    color: var(--teal);
}

/* Supporters */
.supporters {
    margin-top: 4rem;
    text-align: center;
    padding: 3rem 2rem 2.5rem;
}

.supporters h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--teal);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.supporter-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: nowrap;
}

.supporter {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.supporter:hover {
    background: rgba(0, 0, 0, 0.03);
}

.supporter-img {
    height: 88px;
    width: auto;
    max-width: 250px;
    object-fit: contain;
    opacity: 0.9;
    transition: opacity 0.2s;
}

.supporter:hover .supporter-img {
    opacity: 1;
}

/* ============================================
   Apply Section
   ============================================ */

.section-apply {
    background: linear-gradient(180deg, var(--ice) 0%, var(--deep-ocean) 8%, var(--ocean) 30%, var(--ocean-mid) 65%, var(--teal) 100%);
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.apply-contour-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.apply-contour-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
}

.section-apply .container {
    position: relative;
    z-index: 1;
}

.section-apply .section-title {
    color: var(--white);
}

.section-apply .section-title::after {
    background: var(--sand);
}

.apply-content {
    max-width: 600px;
    margin: 0 auto;
}

.apply-content > p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.05rem;
}

.apply-list {
    text-align: left;
    margin: 1.5rem auto;
    max-width: 480px;
    color: rgba(255, 255, 255, 0.85);
    padding-left: 0;
    list-style-position: inside;
}

.apply-list li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.apply-list li::marker {
    color: var(--warm);
}

#apply-btn {
    margin-bottom: 1.5rem;
}

.apply-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8) !important;
}

.apply-note a {
    color: var(--teal-light);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}


/* ============================================
   Animations (scroll-triggered)
   ============================================ */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .highlights-grid,
    .topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--deep-ocean);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 0.5rem;
        transition: right 0.3s ease;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links a {
        font-size: 1rem;
        padding: 0.75rem 1rem;
        width: 100%;
    }

    .nav-cta {
        margin-left: 0 !important;
        margin-top: 0.5rem !important;
        text-align: center;
        justify-content: center;
    }

    .hero-layout {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
    }

    .hero-content {
        max-width: 100%;
    }

    #globe-canvas {
        display: none;
    }

    .deadline-notice {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-layout {
        flex-direction: column;
    }

    .about-illustration {
        flex: none;
        width: 60%;
        margin: 0 auto;
    }

    .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .programme-layout {
        flex-direction: column;
    }

    .programme-ridgeline {
        flex: none;
        width: 60%;
        margin: 0 auto;
        position: static;
    }

    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        display: none;
    }

    .timeline-item {
        display: flex;
        flex-direction: column;
        gap: 0.4rem;
    }

    .timeline-marker {
        position: static;
        transform: none;
    }

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

    .supporter-logos {
        flex-direction: column;
        align-items: center;
    }

    .programme-legend {
        gap: 0.75rem;
    }

    /* FAQ Section — stack illustration below questions */
    .faq-layout {
        flex-direction: column !important;
        gap: 1.5rem;
    }

    .faq-illustration {
        flex: 0 0 auto !important;
        width: 100% !important;
        max-width: 400px;
        margin: 0 auto;
        position: static !important;
        top: auto !important;
        order: -1;
    }

    /* Who Should Apply — hide side illustrations on mobile */
    .who-content {
        flex-direction: column !important;
        gap: 1.5rem;
    }

    .who-illustration-left,
    .who-illustration-right {
        display: none !important;
    }

    /* About Key Facts — stack vertically */
    .about-key-facts {
        flex-wrap: wrap;
        gap: 1.5rem;
        flex-direction: column;
        align-items: center;
    }

    .key-fact {
        width: 100%;
    }

    /* Footer logos */
    .footer-tools-logos,
    .footer-partners-logos {
        gap: 1rem;
    }

    .footer-tool-logo,
    .footer-partner-logo {
        height: 24px;
    }

    /* Organisers — stack cards */
    .organisers-grid {
        grid-template-columns: 1fr;
        max-width: 350px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2.5rem, 8vw, 6rem);
        letter-spacing: 0.04em;
    }

    .highlights-grid,
    .topics-grid {
        grid-template-columns: 1fr;
    }

    .programme-ridgeline {
        width: 100%;
    }

    .about-illustration {
        width: 85%;
        max-width: 250px;
    }

    .faq-illustration {
        width: 90%;
        margin: 0 auto;
    }

    .who-illustration-left,
    .who-illustration-right {
        max-width: 200px;
    }
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background: linear-gradient(160deg, var(--deep-ocean), var(--ocean));
    padding: 2.5rem 0 2rem;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.footer-name {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--white);
}

.footer-subtitle {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.04em;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1.5rem;
}

.footer-links a {
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--teal-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-copy {
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.35);
    letter-spacing: 0.03em;
}

@media (max-width: 768px) {
    .footer-links {
        flex-direction: column;
        gap: 0.6rem;
    }
}

.footer-tools-logos,
.footer-partners-logos {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.footer-tools-logos > span,
.footer-partners-logos > span {
    display: block;
    width: 100%;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.35);
    text-align: center;
    margin-bottom: 0.25rem;
}

.footer-tool-logo,
.footer-partner-logo {
    height: 28px;
    width: auto;
    opacity: 0.5;
    filter: brightness(0) invert(1);
    transition: opacity 0.2s;
}

.footer-tool-logo:hover,
.footer-partner-logo:hover {
    opacity: 0.8;
}

.footer-hosted {
    margin-top: 1.5rem;
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.3);
}

.footer-hosted a {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
}

.footer-hosted a:hover {
    color: rgba(255, 255, 255, 0.6);
}

/* About Key Facts Strip */
.about-key-facts {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem 3rem;
    margin: 2.5rem 0;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.key-fact {
    text-align: center;
}

.key-fact-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--teal);
    line-height: 1;
}

.key-fact-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    margin-top: 0.35rem;
}