:root {
  --navy-950: #032842;
  --navy-900: #083b66;
  --navy-800: #0a4f75;
  --blue-700: #0f6d85;
  --teal-500: #24afb1;
  --teal-300: #75dad8;
  --teal-100: #d9f8f4;
  --yellow: #ffd65c;
  --white: #ffffff;
  --ink: #153247;
  --muted: #5f7483;
  --surface: #f5fafb;
  --border: #d9e8ec;
  --shadow: 0 18px 50px rgba(4, 50, 75, .12);
  --radius: 22px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
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: 1.65; }
a { color: inherit; }
img, svg { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 999; padding: 10px 16px; background: var(--yellow); color: var(--navy-950); font-weight: 800; border-radius: 8px; transition: top .2s; }
.skip-link:focus { top: 12px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; transition: background .25s, box-shadow .25s; }
.site-header.scrolled { background: rgba(3, 40, 66, .96); box-shadow: 0 8px 30px rgba(0, 20, 35, .18); backdrop-filter: blur(12px); }
.navbar { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--white); text-decoration: none; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; background: rgba(255,255,255,.12); }
.brand-mark svg { width: 31px; fill: none; stroke: var(--teal-300); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.brand > span:last-child { display: flex; align-items: baseline; gap: 6px; letter-spacing: -.03em; }
.brand strong { font-size: 1.3rem; }
.brand small { color: var(--yellow); font-size: .76rem; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { position: relative; color: rgba(255,255,255,.84); text-decoration: none; font-size: .89rem; font-weight: 700; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--yellow); transition: right .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.menu-toggle { display: none; width: 44px; height: 42px; padding: 9px; border: 0; border-radius: 10px; background: rgba(255,255,255,.1); cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: white; transition: transform .2s, opacity .2s; }

.hero { position: relative; min-height: 790px; display: grid; align-items: center; overflow: hidden; color: white; background: linear-gradient(135deg, var(--navy-950), var(--navy-900) 52%, #096e7d); }
.hero-grid { position: absolute; inset: 0; opacity: .12; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to right, black, transparent); }
.hero::before { content: ""; position: absolute; inset: auto -10% -46% 28%; height: 700px; border-radius: 50%; background: radial-gradient(circle, rgba(36,175,177,.3), transparent 67%); }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(2px); }
.hero-orb-one { width: 120px; height: 120px; right: 8%; top: 14%; border: 1px solid rgba(117,218,216,.35); }
.hero-orb-two { width: 20px; height: 20px; left: 44%; top: 22%; background: var(--yellow); box-shadow: 0 0 50px rgba(255,214,92,.55); }
.hero-content { position: relative; z-index: 2; padding-top: 95px; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 58px; }
.eyebrow, .section-kicker { margin: 0 0 10px; color: var(--teal-500); font-size: .76rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.hero .eyebrow { color: var(--yellow); }
.hero h1 { max-width: 720px; margin: 0; font-size: clamp(2.7rem, 5.5vw, 5.25rem); line-height: .99; letter-spacing: -.055em; }
.hero-theme { max-width: 690px; margin: 24px 0 0; color: var(--teal-100); font-size: clamp(1.05rem, 1.8vw, 1.35rem); line-height: 1.45; }
.hero-meta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 14px 26px; }
.hero-meta span { display: flex; align-items: center; gap: 9px; font-weight: 800; }
.hero-meta svg { width: 21px; fill: none; stroke: var(--yellow); stroke-width: 1.8; }
.co-location { max-width: 660px; margin: 20px 0 0; color: rgba(255,255,255,.72); font-size: .94rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 31px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border: 1px solid transparent; border-radius: 12px; text-decoration: none; font-weight: 850; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--yellow); color: var(--navy-950); box-shadow: 0 10px 30px rgba(255,214,92,.16); }
.button-secondary { border-color: rgba(255,255,255,.28); color: white; background: rgba(255,255,255,.08); }
.button-light { background: white; color: var(--navy-900); }
.button-disabled { background: #d8e2e5; color: #73848d; pointer-events: none; }
.hero-visual svg { width: 100%; overflow: visible; }
.floating-nodes { animation: float 5s ease-in-out infinite; transform-origin: center; }
.orbit-lines { animation: spin 25s linear infinite; transform-origin: 280px 230px; }
.scroll-cue { position: absolute; z-index: 3; bottom: 24px; left: 50%; width: 28px; height: 44px; border: 2px solid rgba(255,255,255,.35); border-radius: 18px; transform: translateX(-50%); }
.scroll-cue span { position: absolute; top: 8px; left: 50%; width: 4px; height: 8px; border-radius: 4px; background: var(--yellow); transform: translateX(-50%); animation: scroll 1.6s infinite; }

.section { padding: 102px 0; }
.intro-strip { padding: 0; background: var(--navy-950); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats-grid article { padding: 32px; display: flex; flex-direction: column; border-left: 1px solid rgba(255,255,255,.12); color: white; }
.stats-grid article:last-child { border-right: 1px solid rgba(255,255,255,.12); }
.stats-grid strong { color: var(--yellow); font-size: 1.45rem; }
.stats-grid span { color: rgba(255,255,255,.65); font-size: .88rem; }
.two-column { display: grid; grid-template-columns: .78fr 1.22fr; gap: 80px; }
.section-heading h2 { max-width: 760px; margin: 0; color: var(--navy-950); font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p:not(.section-kicker) { max-width: 700px; margin: 17px auto 0; color: var(--muted); }
.centered { text-align: center; }
.centered h2 { margin-inline: auto; }
.prose { font-size: 1.07rem; }
.prose p { margin: 0 0 21px; }
.section-tinted { background: var(--surface); }
.topics-grid { margin-top: 52px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.topic-card { min-height: 275px; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius); background: white; transition: transform .2s, box-shadow .2s, border-color .2s; }
.topic-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--teal-300); }
.topic-card > span { display: inline-flex; width: 41px; height: 41px; align-items: center; justify-content: center; border-radius: 12px; background: var(--teal-100); color: var(--navy-800); font-weight: 900; }
.topic-card h3 { margin: 22px 0 10px; color: var(--navy-950); line-height: 1.25; }
.topic-card p { margin: 0; color: var(--muted); font-size: .93rem; }
.submission-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 70px; }
.notice { margin-top: 28px; padding: 17px 18px; border-left: 4px solid var(--yellow); border-radius: 0 12px 12px 0; background: #fff8db; color: #54491d; }
.requirements-card { padding: 38px; border-radius: var(--radius); background: var(--navy-950); color: white; box-shadow: var(--shadow); }
.requirements-card h3 { margin: 0 0 25px; font-size: 1.55rem; }
.check-list { margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding: 11px 0 11px 31px; border-bottom: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.82); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--yellow); font-weight: 900; }
.button-row { margin-top: 28px; display: flex; flex-wrap: wrap; align-items: center; gap: 20px; }
.text-link { color: var(--teal-300); font-weight: 800; text-decoration: none; }
.dates-section { color: white; background: linear-gradient(135deg, var(--navy-950), var(--navy-800)); }
.dates-section .section-heading h2 { color: white; }
.dates-section .section-heading > p:not(.section-kicker) { color: rgba(255,255,255,.65); }
.dates-section .section-kicker { color: var(--yellow); }
.timeline { position: relative; margin-top: 60px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.timeline::before { content: ""; position: absolute; top: 15px; left: 12%; right: 12%; height: 2px; background: rgba(117,218,216,.35); }
.timeline-item { position: relative; padding-top: 42px; }
.timeline-dot { position: absolute; z-index: 1; top: 5px; left: 0; width: 22px; height: 22px; border: 5px solid var(--navy-800); border-radius: 50%; background: var(--yellow); box-shadow: 0 0 0 2px var(--yellow); }
.timeline-date { margin: 0; color: var(--yellow); font-weight: 900; }
.timeline-item h3 { margin: 7px 0 8px; font-size: 1.23rem; }
.timeline-item > p:last-child { margin: 0; color: rgba(255,255,255,.64); font-size: .93rem; }
.people-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 48px; }
.person-card { padding: 32px; border: 1px solid var(--border); border-radius: var(--radius); text-align: center; background: white; box-shadow: 0 12px 35px rgba(5,50,75,.06); }
.avatar { width: 82px; height: 82px; margin: 0 auto 20px; display: grid; place-items: center; border-radius: 50%; background: linear-gradient(145deg, var(--navy-900), var(--teal-500)); color: white; font-size: 1.25rem; font-weight: 900; }
.person-card h3 { margin: 0; color: var(--navy-950); }
.person-card p { margin: 8px 0 0; color: var(--muted); }
.person-card span { color: var(--teal-500); font-size: .85rem; font-weight: 800; }
.committee-panel { margin-top: 28px; padding: 32px 36px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; align-items: center; border-radius: var(--radius); background: var(--surface); }
.committee-panel h2 { margin: 0; color: var(--navy-950); }
.committee-panel > p { color: var(--muted); }
.venue-section { padding-top: 20px; }
.venue-card { overflow: hidden; display: grid; grid-template-columns: 1fr 1fr; align-items: center; border-radius: 28px; color: white; background: linear-gradient(135deg, #06425f, #0b7280); }
.venue-card > div:first-child { padding: 52px; }
.venue-card h2 { margin: 0; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.08; }
.venue-card p:not(.section-kicker) { color: rgba(255,255,255,.76); }
.venue-card .section-kicker { color: var(--yellow); }
.venue-art { align-self: stretch; display: flex; align-items: end; background: linear-gradient(180deg, rgba(255,255,255,.05), transparent); }
.venue-art svg { display: block; width: 100%; }
.contact-section { padding-top: 25px; }
.contact-card { padding: 46px 52px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-radius: 26px; color: white; background: var(--teal-500); }
.contact-card h2 { margin: 0; font-size: clamp(2rem, 4vw, 3rem); }
.contact-card p:not(.section-kicker) { margin-bottom: 0; color: #073f50; }
.contact-card .section-kicker { color: #073f50; }
.site-footer { padding: 70px 0 24px; color: rgba(255,255,255,.72); background: var(--navy-950); }
.footer-grid { display: grid; grid-template-columns: 1.5fr .7fr .7fr; gap: 70px; }
.footer-grid h3, .footer-brand strong { color: white; }
.footer-brand strong { font-size: 1.3rem; }
.footer-brand p { max-width: 430px; }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; gap: 8px; }
.footer-grid a { text-decoration: none; }
.footer-grid a:hover { color: var(--yellow); }
.footer-bottom { margin-top: 48px; padding-top: 23px; display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.1); font-size: .87rem; }
.footer-bottom a { color: var(--yellow); text-decoration: none; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes scroll { 0% { opacity: 0; transform: translate(-50%,0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%,14px); } }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }
@media (max-width: 1000px) {
  .hero { min-height: auto; padding: 120px 0 85px; }
  .hero-content { grid-template-columns: 1fr; }
  .hero-copy { max-width: 800px; }
  .hero-visual { display: none; }
  .topics-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { display: none; }
}
@media (max-width: 780px) {
  .menu-toggle { display: block; }
  .nav-links { position: absolute; left: 20px; right: 20px; top: 70px; display: none; padding: 18px; flex-direction: column; align-items: stretch; gap: 0; border-radius: 16px; background: var(--navy-950); box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 8px; }
  .nav-links a::after { display: none; }
  .menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.open span:nth-child(2) { opacity: 0; }
  .menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .section { padding: 76px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid article:nth-child(3), .stats-grid article:nth-child(4) { border-top: 1px solid rgba(255,255,255,.12); }
  .two-column, .submission-layout, .committee-panel, .venue-card { grid-template-columns: 1fr; gap: 36px; }
  .people-grid { grid-template-columns: 1fr; }
  .venue-art { min-height: 240px; }
  .contact-card { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .hero h1 { font-size: clamp(2.45rem, 14vw, 4rem); }
  .hero-meta { flex-direction: column; gap: 12px; }
  .hero-actions .button { width: 100%; }
  .stats-grid, .topics-grid, .timeline, .footer-grid { grid-template-columns: 1fr; }
  .stats-grid article { border-right: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
  .topic-card { min-height: auto; }
  .requirements-card, .venue-card > div:first-child, .contact-card { padding: 30px 24px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: 6px; }
}