:root {
  --ink: #12332c;
  --deep: #0b201b;
  --paper: #fbfcfa;
  --soft: #edf3f0;
  --line: #cfdbd5;
  --muted: #5f746d;
  --green: #2f796b;
  --coral: #dc644b;
  --lime: #dced78;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.65 'DM Sans', sans-serif; }
.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.topline { padding: 8px 24px; background: var(--deep); color: #d5e2dc; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-align: center; text-transform: uppercase; }
.topline span { margin-left: 20px; color: var(--lime); }
.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid var(--line); background: rgba(251, 252, 250, .96); backdrop-filter: blur(12px); }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font: 700 19px 'Space Grotesk'; letter-spacing: -.045em; text-decoration: none; }
.brand b { color: var(--coral); }
.brand-symbol { display: grid; width: 29px; height: 29px; place-items: center; background: var(--ink); color: var(--lime); font: 700 17px 'Space Grotesk'; }
.site-header nav { display: flex; gap: 24px; margin-left: auto; }
.site-header nav a, .header-link { color: var(--muted); font-size: 13px; text-decoration: none; }
.site-header nav a:hover, .header-link:hover { color: var(--coral); }
.header-link { padding: 8px 12px; border: 1px solid var(--line); }
.header-link span { margin-left: 11px; color: var(--coral); }
.menu-toggle { display: none; border: 0; background: transparent; cursor: pointer; }

.hero { position: relative; min-height: 680px; overflow: hidden; display: flex; align-items: stretch; background: var(--deep); color: #fff; }
.hero::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(11, 32, 27, .96) 0%, rgba(11, 32, 27, .85) 42%, rgba(11, 32, 27, .26) 100%), url('https://icaif2026.org/img/hero-v4.jpg'); background-position: center; background-size: cover; }
.hero::after { content: ''; position: absolute; right: 6%; bottom: -105px; width: 360px; height: 360px; border: 1px solid rgba(220, 237, 120, .46); border-radius: 50%; box-shadow: 0 0 0 34px rgba(220, 237, 120, .08), 0 0 0 68px rgba(220, 237, 120, .04); }
.hero-overlay, .hero-grid { display: none; }
.hero-content { position: relative; z-index: 1; padding: 94px 0 56px; }
.eyebrow, .kicker { margin: 0; color: var(--lime); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 28px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 5px rgba(220, 100, 75, .2); }
.hero h1 { max-width: 880px; margin: 0; font: 700 clamp(50px, 7.6vw, 96px)/.98 'Space Grotesk'; letter-spacing: -.08em; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero-subtitle { margin: 20px 0 14px; color: #dce7e2; font: 500 clamp(20px, 2.6vw, 28px)/1.25 'Space Grotesk'; letter-spacing: -.04em; }
.hero-description { max-width: 540px; margin: 0; color: #c5d3cd; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 31px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; min-width: 196px; padding: 14px 16px; font-size: 13px; font-weight: 700; text-decoration: none; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button span { font-size: 18px; }
.button-accent { background: var(--coral); color: #fff; }
.button-accent:hover { background: #c8513a; }
.button-dark { background: var(--deep); color: var(--lime); }
.hero-text-link { color: #fff; border-bottom: 1px solid rgba(255,255,255,.56); font-size: 13px; text-decoration: none; }
.hero-text-link span { margin-left: 9px; color: var(--lime); }
.hero-facts { display: flex; width: min(680px, 100%); margin-top: 62px; border-top: 1px solid rgba(255,255,255,.3); }
.hero-facts div { flex: 1; min-width: 0; margin-top: 17px; padding-right: 18px; }
.hero-facts div + div { padding-left: 18px; border-left: 1px solid rgba(255,255,255,.22); }
.hero-facts small { display: block; color: #a8bcb4; font-size: 10px; font-weight: 600; letter-spacing: .13em; }
.hero-facts strong { display: block; margin-top: 5px; font: 600 14px 'Space Grotesk'; }
.hero-corner { position: absolute; z-index: 1; top: 26px; right: 28px; color: rgba(255,255,255,.72); font-size: 10px; letter-spacing: .12em; line-height: 1.7; text-align: right; }
.hero-corner span { color: var(--lime); }

.section { padding: 100px 0; }
.section-intro { max-width: 780px; }
.section-intro .kicker { margin-bottom: 15px; color: var(--green); }
.section-intro h2, .submit-layout h2 { margin: 0; font: 600 clamp(38px, 5.2vw, 64px)/1.02 'Space Grotesk'; letter-spacing: -.07em; }
.section-intro h2 span, .submit-layout h2 span { color: var(--coral); }
.about-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 90px; margin-top: 48px; padding-top: 29px; border-top: 1px solid var(--line); }
.about-layout p { margin: 0 0 20px; color: var(--muted); }
.about-layout .large-copy { color: var(--ink); font: 500 24px/1.38 'Space Grotesk'; letter-spacing: -.04em; }

.topics-section { background: var(--deep); color: #fff; }
.topics-section .section-intro .kicker { color: var(--lime); }
.topics-section .section-intro h2 { color: #fff; }
.section-note { max-width: 560px; margin: 19px 0 0; color: #b6c8c1; }
.topic-accordion { margin-top: 48px; border-top: 1px solid rgba(255,255,255,.24); }
.topic-accordion details { border-bottom: 1px solid rgba(255,255,255,.24); }
.topic-accordion summary { display: grid; grid-template-columns: 1fr 28px; gap: 18px; align-items: center; padding: 23px 0; cursor: pointer; list-style: none; }
.topic-accordion summary::-webkit-details-marker { display: none; }
.topic-accordion summary > span { color: var(--lime); font: 600 12px 'Space Grotesk'; }
.topic-accordion summary strong { font: 600 22px 'Space Grotesk'; letter-spacing: -.035em; }
.topic-accordion summary i { color: var(--lime); font-size: 25px; font-style: normal; text-align: right; transition: transform .2s ease; }
.topic-accordion details[open] summary i { transform: rotate(45deg); }
.topic-accordion details p { max-width: 650px; margin: -4px 35px 25px 0; color: #bdd0c8; font-size: 15px; }

.dates-section { background: #fff; }
.date-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.date-card { min-height: 250px; padding: 25px; border: 1px solid var(--line); background: var(--paper); transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.date-card:hover, .date-card.active { transform: translateY(-5px); border-color: var(--green); box-shadow: 0 12px 24px rgba(18,51,44,.09); }
.date-number { display: none; }
.date-card time { display: block; color: var(--green); font: 600 16px/1.2 'Space Grotesk'; }
.date-card time b { color: var(--ink); }
.date-card h3 { margin: 47px 0 10px; font: 600 22px/1.15 'Space Grotesk'; letter-spacing: -.04em; }
.date-card p { margin: 0; color: var(--muted); font-size: 14px; }

.people-section { background: var(--soft); }
.people-tabs { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 45px; border-bottom: 1px solid var(--line); }
.people-tab { margin-bottom: -1px; padding: 12px 15px; border: 1px solid transparent; border-bottom: 0; background: transparent; color: var(--muted); font-size: 13px; font-weight: 700; cursor: pointer; }
.people-tab:hover, .people-tab.active { border-color: var(--line); background: var(--paper); color: var(--green); }
.people-panel { display: none; padding-top: 30px; }
.people-panel.active { display: block; animation: fade-in .25s ease; }
@keyframes fade-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }
.announcement-card { display: flex; align-items: center; gap: 22px; padding: 28px; border: 1px solid var(--line); background: var(--paper); }
.announcement-mark { display: grid; width: 47px; height: 47px; place-items: center; background: var(--lime); font-size: 23px; }
.announcement-card h3 { margin: 0 0 4px; font: 600 23px 'Space Grotesk'; letter-spacing: -.04em; }
.announcement-card p { margin: 0; color: var(--muted); font-size: 14px; }
.people-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.people-grid > div { min-height: 92px; padding: 18px; border: 1px solid var(--line); background: var(--paper); transition: transform .18s ease, border-color .18s ease; }
.people-grid > div:hover { transform: translateY(-3px); border-color: var(--green); }
.people-grid strong { display: block; font: 600 16px 'Space Grotesk'; letter-spacing: -.025em; }
.people-grid span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; }

.submit-section { padding: 96px 0; background: var(--lime); }
.submit-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: end; }
.submit-layout .kicker { margin-bottom: 12px; color: var(--green); }
.submit-layout p { max-width: 460px; margin: 0; color: #405951; }
.submit-layout .button { margin-top: 27px; }

footer { padding: 38px 0; background: var(--deep); color: #fff; }
.footer-layout { display: flex; justify-content: space-between; gap: 60px; }
.footer-brand { color: #fff; }
.footer-layout p { margin: 12px 0 0; color: #a9bcb4; font-size: 13px; }
.footer-layout > div:last-child { text-align: right; }
.footer-layout a:not(.brand) { display: inline-block; margin-top: 12px; color: var(--lime); font-size: 13px; text-decoration: none; }

@media (max-width: 800px) {
  .container { width: min(100% - 36px, 620px); }
  .topline { padding: 8px 12px; font-size: 9px; }
  .topline span { display: none; }
  .header-inner { min-height: 66px; }
  .site-header nav { display: none; position: absolute; top: 66px; right: 0; left: 0; padding: 10px 18px 18px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 24px rgba(18,51,44,.08); }
  .site-header nav.open { display: grid; gap: 0; }
  .site-header nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .menu-toggle { display: grid; gap: 5px; margin-left: auto; padding: 7px; }
  .menu-toggle i { display: block; width: 22px; height: 2px; background: var(--ink); }
  .header-link { display: none; }
  .hero { min-height: 690px; }
  .hero::before { background-image: linear-gradient(90deg, rgba(11,32,27,.94), rgba(11,32,27,.63)), url('https://icaif2026.org/img/hero-v4.jpg'); background-position: 58% center; }
  .hero-content { padding-top: 72px; }
  .hero h1 { font-size: clamp(46px, 13vw, 74px); }
  .hero-description { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 19px; }
  .hero-facts { display: grid; grid-template-columns: 1fr 1fr; margin-top: 50px; }
  .hero-facts div { margin-top: 15px; padding-right: 12px; }
  .hero-facts div + div { padding-left: 12px; }
  .hero-facts div:last-child { grid-column: 1 / -1; border-left: 0; padding-left: 0; }
  .hero-corner { top: 17px; right: 18px; font-size: 8px; }
  .section { padding: 76px 0; }
  .section-intro h2, .submit-layout h2 { font-size: 39px; }
  .about-layout, .submit-layout { grid-template-columns: 1fr; gap: 29px; margin-top: 38px; }
  .about-layout .large-copy { font-size: 21px; }
  .topic-accordion { margin-top: 38px; }
  .topic-accordion summary { grid-template-columns: 1fr 24px; gap: 12px; padding: 18px 0; }
  .topic-accordion summary strong { font-size: 18px; }
  .topic-accordion details p { margin: 0 24px 20px 0; font-size: 14px; }
  .date-grid { grid-template-columns: 1fr; margin-top: 38px; }
  .date-card { min-height: 0; }
  .date-card h3 { margin-top: 34px; font-size: 20px; }
  .people-tabs { margin-top: 35px; gap: 0; }
  .people-tab { padding: 10px 9px; font-size: 11px; }
  .people-grid { grid-template-columns: 1fr; }
  .announcement-card { padding: 21px; }
  .submit-layout { gap: 35px; }
  .footer-layout { display: grid; gap: 28px; }
  .footer-layout > div:last-child { text-align: left; }
}