:root {
  --navy: #082a3a;
  --navy-2: #0d3b4d;
  --green: #159873;
  --green-dark: #0e7257;
  --mint: #eaf7f3;
  --cream: #f7f7f1;
  --white: #ffffff;
  --text: #18313b;
  --muted: #6c7a80;
  --line: #dfe7e8;
  --shadow: 0 20px 50px rgba(8, 42, 58, .12);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "DM Sans", sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.announcement {
  background: var(--navy);
  color: white;
  font-size: 14px;
}
.announcement-inner {
  min-height: 38px;
  display: flex;
  justify-content: center;
  gap: 12px;
  align-items: center;
}
.announcement a { color: #7ce3c4; font-weight: 700; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(8,42,58,.08);
}
.nav-wrap {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--green), #31c89c);
  color: white; font-family: "Manrope"; font-weight: 800; font-size: 24px;
  box-shadow: 0 12px 25px rgba(21,152,115,.24);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-family: "Manrope"; font-size: 18px; }
.brand-text small { color: var(--muted); margin-top: 4px; }

.main-nav { display: flex; align-items: center; gap: 25px; font-weight: 600; font-size: 14px; }
.main-nav a:hover { color: var(--green); }
.nav-login { padding-left: 12px; border-left: 1px solid var(--line); }
.nav-cta {
  color: white !important;
  background: var(--green);
  padding: 12px 18px;
  border-radius: 999px;
}
.menu-toggle { display: none; border: 0; background: transparent; padding: 5px; }
.menu-toggle span { display: block; width: 25px; height: 2px; background: var(--navy); margin: 5px 0; }

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 10%, rgba(49,200,156,.18), transparent 32%),
    linear-gradient(135deg, #f4fbf8 0%, #ffffff 55%, #eef6f8 100%);
}
.hero-grid {
  min-height: 700px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  align-items: center;
  gap: 60px;
  padding-block: 85px;
}
.eyebrow, .section-tag {
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .16em;
}
.hero h1 {
  font-family: "Manrope";
  font-size: clamp(44px, 5vw, 72px);
  line-height: 1.04;
  letter-spacing: -.04em;
  margin: 16px 0 22px;
  max-width: 820px;
}
.hero-lead { font-size: 19px; color: var(--muted); max-width: 700px; }
.hero-meta { display: flex; gap: 45px; margin: 30px 0; }
.meta-label { display:block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .12em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items:center; justify-content:center;
  min-height: 50px; padding: 0 22px; border-radius: 999px;
  font-weight: 800; transition: .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--green); color: white; box-shadow: 0 14px 28px rgba(21,152,115,.24); }
.btn-secondary { border: 1px solid var(--navy); color: var(--navy); background: white; }
.btn-outline { border: 1px solid var(--green); color: var(--green-dark); }
.btn-light { background:white; color: var(--navy); }
.btn-ghost { border:1px solid rgba(255,255,255,.5); color:white; }

.countdown-card {
  margin-top: 34px;
  display: inline-flex;
  gap: 24px;
  padding: 18px 22px;
  border: 1px solid rgba(8,42,58,.08);
  background: rgba(255,255,255,.78);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.count-item { min-width: 62px; text-align: center; }
.count-item strong { display:block; font-family:"Manrope"; font-size: 24px; }
.count-item span { color: var(--muted); font-size: 12px; }

.hero-visual { position: relative; min-height: 510px; }
.visual-ring { position:absolute; border-radius:50%; border:1px solid rgba(21,152,115,.24); }
.ring-one { width: 480px; height: 480px; right: -30px; top: 20px; }
.ring-two { width: 350px; height: 350px; right: 35px; top: 85px; }
.visual-card {
  position:absolute; z-index:2;
  background: linear-gradient(160deg, var(--navy), #0b4a5e);
  color:white; border-radius: 32px; box-shadow: 0 35px 90px rgba(8,42,58,.25);
}
.card-main { inset: 105px 25px 45px 65px; padding: 50px; display:flex; flex-direction:column; justify-content:space-between; }
.card-kicker { color:#77e4c3; text-transform:uppercase; letter-spacing:.16em; font-size:12px; font-weight:800; }
.card-main h2 { font-family:"Manrope"; font-size: 38px; line-height:1.15; margin:0; }
.card-footer { display:flex; flex-wrap:wrap; gap:10px; }
.card-footer span { border:1px solid rgba(255,255,255,.22); border-radius:999px; padding:8px 12px; font-size:12px; }
.floating-card {
  position:absolute; z-index:3; background:white; border-radius:16px;
  padding:14px 18px; font-weight:800; box-shadow: var(--shadow);
}
.floating-top { top:55px; right:0; }
.floating-bottom { bottom:20px; left:10px; }

.quick-links { background: white; position:relative; z-index:4; margin-top:-20px; }
.quick-grid { display:grid; grid-template-columns: repeat(4,1fr); box-shadow: var(--shadow); border-radius:22px; overflow:hidden; }
.quick-grid a { padding:26px; background:white; border-right:1px solid var(--line); }
.quick-grid a:last-child { border-right:0; }
.quick-grid a:hover { background: var(--mint); }
.quick-grid span { color:var(--green); font-weight:800; }
.quick-grid strong, .quick-grid small { display:block; }
.quick-grid strong { margin:8px 0 3px; }
.quick-grid small { color:var(--muted); }

/* Co-organizers */
.coorganizer-section { padding:56px 0 20px; background:#fff; }
.coorganizer-heading { text-align:center; margin-bottom:28px; }
.coorganizer-heading h2 { margin:7px 0 0; font-family:"Manrope"; font-size:clamp(25px,3vw,34px); letter-spacing:-.02em; }
.coorganizer-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:22px;
  max-width:920px; margin:0 auto;
}
.coorganizer-card {
  min-height:190px; border:1px solid var(--line); border-radius:20px; background:#fff;
  display:flex; align-items:stretch; justify-content:center; overflow:hidden;
  box-shadow:0 10px 30px rgba(8,42,58,.05);
}
.coorganizer-link { width:100%; display:flex; flex-direction:column; justify-content:center; padding:24px 26px; transition:.2s ease; }
.coorganizer-card:not(:has(.coorganizer-link)) { padding:24px 26px; flex-direction:column; }
.coorganizer-link:hover { background:#f7fbfa; }
.coorganizer-logo-wrap { height:92px; display:flex; align-items:center; justify-content:center; margin-bottom:14px; }
.coorganizer-logo { max-width:100%; width:auto; max-height:88px; height:auto; object-fit:contain; }
.coorganizer-logo-placeholder { width:150px; height:76px; display:grid; place-items:center; border:1px dashed #b9cbcc; border-radius:12px; color:#9aabad; font-weight:800; letter-spacing:.12em; }
.coorganizer-name { text-align:center; line-height:1.35; }
.coorganizer-name strong { display:block; font-family:"Manrope"; font-size:16px; color:var(--navy); }
.coorganizer-name span { display:block; color:var(--muted); font-size:13px; margin-top:6px; }

.section { padding: 100px 0; }
.section-soft { background: var(--cream); }
.section-dark { background: var(--navy); color:white; }
.section-title {
  font-family:"Manrope";
  font-size: clamp(34px, 4vw, 52px);
  line-height:1.12;
  letter-spacing:-.03em;
  margin:12px 0 0;
}
.section-heading { display:flex; justify-content:space-between; align-items:end; gap:40px; margin-bottom:48px; }
.section-heading > p { max-width:460px; color:var(--muted); }
.section-heading.light > p { color:rgba(255,255,255,.65); }
.section-copy, .prose { color: var(--muted); font-size: 17px; }
.split-layout { display:grid; grid-template-columns:.9fr 1.1fr; gap:80px; }
.stats-row { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:34px; }
.stats-row div { background:var(--mint); padding:20px; border-radius:16px; }
.stats-row strong { display:block; font-family:"Manrope"; font-size:28px; color:var(--green-dark); }
.stats-row span { font-size:13px; }

.theme-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.theme-card {
  background:white; padding:30px; border-radius:var(--radius);
  border:1px solid rgba(8,42,58,.07); transition:.22s ease;
}
.theme-card:hover { transform:translateY(-6px); box-shadow:var(--shadow); }
.theme-icon {
  width:48px;height:48px;border-radius:14px;background:var(--mint);
  display:grid;place-items:center;color:var(--green-dark);font-weight:800;
}
.theme-card h3 { font-family:"Manrope"; font-size:20px; }
.theme-card p { color:var(--muted); }

.speaker-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.speaker-card { border:1px solid var(--line); border-radius:22px; overflow:hidden; background:white; }
.speaker-photo { aspect-ratio: 2/3; }
.speaker-placeholder {
  display:grid;place-items:center;
  background:linear-gradient(145deg,#d9eee7,#e9f3f5);
  font-family:"Manrope"; font-size:80px; font-weight:800; color:rgba(8,42,58,.18);
}
.speaker-info { padding:24px; }
.speaker-info h3 { margin:0 0 8px; font-family:"Manrope"; }
.speaker-info p { margin:0 0 6px; color:var(--green-dark); font-weight:700; }
.speaker-info span { color:var(--muted); font-size:14px; }

.timeline { max-width:900px; margin:auto; }
.timeline-item {
  display:grid; grid-template-columns:220px 1fr; gap:40px;
  padding:28px 0; border-bottom:1px solid rgba(255,255,255,.13);
}
.timeline-date { color:#7ce3c4; font-weight:800; }
.timeline-item strong { font-size:18px; }
.timeline-item p { color:rgba(255,255,255,.62); margin:5px 0 0; }
.timeline-item.accent { border-bottom:0; }
.timeline-item.accent .timeline-date { color:white; font-size:20px; }

.submission-grid { display:grid; grid-template-columns:1fr 1fr; gap:80px; align-items:center; }
.submission-language-box {
  display:grid; grid-template-columns:46px 1fr; gap:14px; align-items:start;
  margin-top:24px; padding:18px 20px; border:1px solid rgba(21,152,115,.24);
  border-radius:16px; background:#f1faf7;
}
.submission-language-icon {
  width:46px; height:46px; border-radius:13px; display:grid; place-items:center;
  background:white; font-size:22px; box-shadow:0 6px 18px rgba(8,42,58,.06);
}
.submission-language-box strong { display:block; font-family:"Manrope"; color:var(--navy); margin:1px 0 6px; }
.submission-language-box p { margin:2px 0; color:var(--green-dark); font-weight:700; line-height:1.5; }
.submission-language-box .submission-language-vi { color:var(--muted); font-weight:600; }
.submission-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:28px; }
.step-list { display:flex; flex-direction:column; gap:16px; }
.step-item { display:grid; grid-template-columns:48px 1fr; gap:16px; padding:20px; background:var(--cream); border-radius:16px; }
.step-item > span { width:48px;height:48px;border-radius:14px;background:var(--navy);color:white;display:grid;place-items:center;font-weight:800; }
.step-item strong { font-family:"Manrope"; }
.step-item p { margin:3px 0 0; color:var(--muted); }

.publication-grid { display:grid; grid-template-columns:1.35fr .825fr .825fr; gap:22px; }
.publication-card { background:white; border-radius:var(--radius); padding:32px; border:1px solid rgba(8,42,58,.07); }
.publication-card.featured { background:var(--mint); }
.publication-card h2, .publication-card h3 { font-family:"Manrope"; }
.publication-card p { color:var(--muted); }
.publication-card a { color:var(--green-dark); font-weight:800; }

.venue-grid { display:grid; grid-template-columns:1fr 1fr; gap:30px; }
.venue-card, .map-card { border-radius:var(--radius); overflow:hidden; min-height:420px; }
.venue-card { background:var(--navy); color:white; padding:46px; }
.venue-card p { color:rgba(255,255,255,.68); }
.venue-meta { margin-top:30px; display:grid; gap:14px; }
.venue-meta div { display:flex; justify-content:space-between; padding-bottom:12px; border-bottom:1px solid rgba(255,255,255,.14); }
.venue-meta span { color:rgba(255,255,255,.55); }
.map-card { position:relative; background:#e5f2ee; }
.map-grid {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(8,42,58,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8,42,58,.08) 1px, transparent 1px);
  background-size:38px 38px;
  transform:rotate(-7deg) scale(1.2);
}
.map-pin {
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  background:var(--green); color:white; padding:13px 18px; border-radius:999px; font-weight:800;
  box-shadow:var(--shadow);
}

.section-cta { padding-top:40px; }
.cta-box {
  background:linear-gradient(135deg,var(--green-dark),var(--navy));
  color:white; border-radius:30px; padding:55px;
  display:flex; align-items:center; justify-content:space-between; gap:35px;
}
.cta-box h2 { font-family:"Manrope"; font-size:clamp(30px,3.5vw,46px); max-width:760px; line-height:1.14; margin:10px 0 0; }
.cta-actions { display:flex; flex-direction:column; gap:12px; min-width:190px; }

.site-footer { background:#061e2a; color:white; margin-top:90px; padding:70px 0 24px; }
.footer-grid { display:grid; grid-template-columns:1.5fr repeat(3,1fr); gap:50px; }
.footer-brand { margin-bottom:18px; }
.footer-grid p, .footer-grid span, .footer-grid a { color:rgba(255,255,255,.62); display:block; margin:8px 0; font-size:14px; }
.footer-grid h4 { margin:0 0 16px; }
.footer-grid a:hover { color:#7ce3c4; }
.footer-bottom { display:flex; justify-content:space-between; border-top:1px solid rgba(255,255,255,.1); padding-top:22px; margin-top:45px; color:rgba(255,255,255,.5); font-size:13px; }

.floating-submit {
  position:fixed; right:24px; bottom:24px; z-index:900;
  background:var(--green); color:white; padding:14px 20px; border-radius:999px;
  font-weight:800; box-shadow:0 15px 40px rgba(21,152,115,.34);
}

@media (max-width: 1024px) {
  .main-nav { position:fixed; inset:120px 20px auto 20px; background:white; flex-direction:column; align-items:stretch; padding:24px; border-radius:18px; box-shadow:var(--shadow); display:none; }
  .main-nav.open { display:flex; }
  .menu-toggle { display:block; }
  .nav-login { border-left:0; padding-left:0; }
  .hero-grid, .split-layout, .submission-grid, .venue-grid { grid-template-columns:1fr; }
  .hero-grid { padding-top:60px; }
  .hero-visual { min-height:500px; }
  .quick-grid { grid-template-columns:repeat(2,1fr); }
  .theme-grid, .speaker-grid { grid-template-columns:repeat(2,1fr); }
  .publication-grid { grid-template-columns:1fr; }
  .section-heading { align-items:start; flex-direction:column; }
  .footer-grid { grid-template-columns:1.2fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column:2/4; }
}

@media (max-width: 680px) {
  .container { width:min(100% - 28px, 1180px); }
  .announcement-inner { justify-content:flex-start; overflow:auto; white-space:nowrap; }
  .nav-wrap { height:70px; }
  .brand-text small { display:none; }
  .hero-grid { min-height:auto; gap:25px; }
  .hero h1 { font-size:42px; }
  .hero-meta { flex-direction:column; gap:14px; }
  .hero-actions .btn { width:100%; }
  .countdown-card { display:grid; grid-template-columns:repeat(2,1fr); width:100%; }
  .hero-visual { min-height:390px; }
  .card-main { inset:65px 0 35px 25px; padding:30px; }
  .card-main h2 { font-size:29px; }
  .ring-one { width:360px; height:360px; }
  .ring-two { width:270px; height:270px; }
  .floating-top { right:5px; top:25px; }
  .quick-grid { grid-template-columns:1fr; }
  .quick-grid a { border-right:0; border-bottom:1px solid var(--line); }
  .section { padding:75px 0; }
  .stats-row, .theme-grid, .speaker-grid { grid-template-columns:1fr; }
  .coorganizer-grid { grid-template-columns:1fr; }
  .coorganizer-card { min-height:170px; }
  .timeline-item { grid-template-columns:1fr; gap:8px; }
  .cta-box { padding:34px 24px; flex-direction:column; align-items:flex-start; }
  .cta-actions { width:100%; }
  .footer-grid { grid-template-columns:1fr; }
  .footer-grid > div:last-child { grid-column:auto; }
  .footer-bottom { flex-direction:column; gap:8px; }
  .floating-submit { right:14px; bottom:14px; }
}

/* Dynamic content additions */
.speaker-image { width:100%; height:100%; object-fit:cover; object-position:center top; background:#edf5f2; }
.map-live { background:#e5f2ee; }
.map-live { position:relative; min-height:420px; overflow:hidden; }
.map-live iframe { position:absolute; inset:0; width:100% !important; height:100% !important; min-height:420px; border:0; display:block; }
.venue-meta strong { max-width:68%; text-align:right; }