/* ═══════════════════════════════════════════════════════════════════
   MAST @ FIRE 2026 — Stylesheet
   ═══════════════════════════════════════════════════════════════════ */

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

:root {
  --blue:        #2563eb;
  --blue-dark:   #1d4ed8;
  --blue-light:  #dbeafe;
  --orange:      #f97316;
  --orange-dark: #ea580c;
  --orange-light:#fff7ed;
  --green:       #16a34a;
  --yellow:      #ca8a04;
  --red:         #dc2626;
  --gray-50:     #f9fafb;
  --gray-100:    #f3f4f6;
  --gray-200:    #e5e7eb;
  --gray-300:    #d1d5db;
  --gray-500:    #6b7280;
  --gray-600:    #4b5563;
  --gray-700:    #374151;
  --gray-800:    #1f2937;
  --gray-900:    #111827;
  --font:        'Inter', system-ui, sans-serif;
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
  --radius:      0.75rem;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow:      0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:   0 8px 32px rgba(0,0,0,.14);
  --transition:  0.2s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: #fff;
  line-height: 1.65;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--gray-100);
  padding: 0.15em 0.4em;
  border-radius: 0.25rem;
  color: var(--gray-800);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hidden { display: none !important; }

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary  { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }

.btn-secondary { background: var(--orange); color: #fff; }
.btn-secondary:hover { background: var(--orange-dark); }

.btn-outline { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover { background: var(--blue-light); }

.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { color: var(--blue); background: var(--gray-100); }

.btn-white { background: #fff; color: var(--blue); }
.btn-white:hover { background: var(--blue-light); }

.btn-sm  { padding: 0.45rem 1rem; font-size: 0.875rem; }
.btn-lg  { padding: 0.85rem 2rem; font-size: 1.05rem; }

/* ── Navigation ───────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0.85rem 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow-sm);
  padding: 0.6rem 0;
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: #fff;
  text-decoration: none;
  transition: color var(--transition);
}
.navbar.scrolled .nav-logo { color: var(--gray-900); }
.nav-logo-sub { font-weight: 400; opacity: 0.7; font-size: 0.9rem; }
.nav-logo-img {
  height: 30px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: filter var(--transition);
}
.navbar.scrolled .nav-logo-img { filter: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  padding: 0.4rem 0.75rem;
  border-radius: 0.4rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.9);
  transition: all var(--transition);
  text-decoration: none;
}
.navbar.scrolled .nav-links a { color: var(--gray-700); }
.nav-links a:hover { background: rgba(255,255,255,0.15); color: #fff; }
.navbar.scrolled .nav-links a:hover { background: var(--gray-100); color: var(--gray-900); }

.nav-links .nav-cta {
  background: #fff;
  color: var(--blue) !important;
  font-weight: 700;
  padding: 0.4rem 1rem;
  border-radius: 2rem;
}
.navbar.scrolled .nav-links .nav-cta {
  background: var(--blue);
  color: #fff !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}
.navbar.scrolled .nav-hamburger span { background: var(--gray-800); }

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 35%, #0891b2 70%, #0e7490 100%);
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
  color: #fff;
}
.hero-logo {
  display: block;
  width: 140px;
  height: 140px;
  object-fit: contain;
  margin: 1rem auto 0.5rem;
  filter: brightness(0) invert(1);
  opacity: 0.92;
}
.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}
.hero-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.hero-acronym {
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(90deg, #fff 0%, #bfdbfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-full {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 400;
  opacity: 0.85;
  letter-spacing: 0.02em;
}
.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  opacity: 0.95;
  margin-bottom: 1rem;
  line-height: 1.4;
}
.hero-desc {
  font-size: 1rem;
  opacity: 0.8;
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 2.5rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 1.25rem 2rem;
  backdrop-filter: blur(8px);
  max-width: 680px;
  margin-left: auto; margin-right: auto;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0 2rem;
}
.stat-num {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.25);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── News Bar ─────────────────────────────────────────────────────── */
.news-bar {
  background: var(--gray-900);
  color: #fff;
  padding: 2.5rem 0;
}
.news-bar .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}
.news-label {
  background: var(--orange);
  color: #fff;
  padding: 0.4rem 1.1rem;
  border-radius: 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.news-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.news-list li { font-size: 1.05rem; opacity: 0.9; line-height: 1.6; }
.news-date { font-weight: 700; color: #93c5fd; margin-right: 0.4rem; }
.news-list a { color: #60a5fa; }

/* ── Sections ─────────────────────────────────────────────────────── */
.section { padding: 5rem 0; }
.section-alt { background: var(--gray-50); }

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}
.section-sub {
  color: var(--gray-500);
  font-size: 1rem;
}

/* ── About ────────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 3rem;
  align-items: start;
}
.about-text p { color: var(--gray-600); margin-bottom: 1rem; line-height: 1.75; }
.about-text strong { color: var(--gray-800); }
.about-links { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.5rem; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.85rem;
  background: var(--blue-light);
  color: var(--blue-dark);
  border-radius: 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
}
.pill:hover { background: var(--blue); color: #fff; text-decoration: none; }

.about-diagram { display: flex; justify-content: center; }
.diagram-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
}
.diagram-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.85rem 1.5rem;
  border-radius: 0.6rem;
  width: 100%;
  text-align: center;
}
.diagram-step.query   { background: #eff6ff; border: 1.5px solid #bfdbfe; }
.diagram-step.agent   { background: #f5f3ff; border: 1.5px solid #ddd6fe; }
.diagram-step.corpus  { background: #fefce8; border: 1.5px solid #fde68a; }
.diagram-step.answer  { background: #f0fdf4; border: 1.5px solid #bbf7d0; }
.diagram-icon  { font-size: 1.5rem; }
.diagram-label { font-weight: 700; font-size: 0.95rem; color: var(--gray-800); }
.diagram-eg    { font-size: 0.78rem; color: var(--gray-500); }
.diagram-arrow { font-size: 1.2rem; color: var(--gray-400); }

/* ── Tracks ───────────────────────────────────────────────────────── */
.tracks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.track-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--gray-200);
}
.track-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.track-top {
  padding: 2rem 2rem 1.5rem;
}
.track-multilingual .track-top { background: linear-gradient(135deg, #1e3a8a, #2563eb); }
.track-indic .track-top        { background: linear-gradient(135deg, #9a3412, #f97316); }

.track-badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}
.badge-blue   { background: rgba(255,255,255,0.2); color: #fff; }
.badge-orange { background: rgba(255,255,255,0.2); color: #fff; }

.track-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}
.track-tagline {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  line-height: 1.5;
}
.track-body { padding: 1.5rem 2rem; flex: 1; }
.track-body p { color: var(--gray-600); font-size: 0.95rem; margin-bottom: 1.25rem; line-height: 1.7; }

.track-tiers { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.tier {
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.tier-high, .tier-indic-hi    { background: #f0fdf4; border-left: 3px solid #16a34a; }
.tier-mid,  .tier-indic-mid   { background: #fefce8; border-left: 3px solid #ca8a04; }
.tier-low,  .tier-indic-low   { background: #fef2f2; border-left: 3px solid #dc2626; }
.tier-label { font-weight: 700; font-size: 0.82rem; color: var(--gray-700); }
.tier-langs { font-size: 0.85rem; color: var(--gray-600); }

.track-facts { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.track-facts li { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.88rem; color: var(--gray-600); }
.fact-icon { flex-shrink: 0; }

.track-footer {
  padding: 1.25rem 2rem;
  border-top: 1px solid var(--gray-100);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Language Table ───────────────────────────────────────────────── */
.lang-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
  padding-bottom: 0;
}
.lang-tab {
  padding: 0.6rem 1.25rem;
  border: none;
  background: none;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}
.lang-tab.active { color: var(--blue); border-bottom-color: var(--blue); }
.lang-tab:hover  { color: var(--gray-800); }

.lang-table-wrap { overflow-x: auto; }

.lang-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.lang-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  background: var(--gray-50);
  border-bottom: 2px solid var(--gray-200);
}
.lang-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}
.lang-table tbody tr:hover td { background: #f0f9ff; }
.tier-group-header {
  background: var(--gray-50) !important;
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.5rem 1rem !important;
}

.badge-tier {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.badge-tier.high { background: #dcfce7; color: #15803d; }
.badge-tier.mid  { background: #fef9c3; color: #854d0e; }
.badge-tier.low  { background: #fee2e2; color: #991b1b; }

.table-note {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--gray-500);
  font-style: italic;
}

/* ── Evaluation Cards ─────────────────────────────────────────────── */
.eval-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.eval-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}
.eval-card:hover { box-shadow: var(--shadow); }
.eval-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.eval-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.75rem; }
.eval-card p { font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 0.75rem; }
.eval-link { font-size: 0.85rem; font-weight: 600; color: var(--blue); }

/* ── Code Block ───────────────────────────────────────────────────── */
.code-block-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.22), 0 2px 8px rgba(0,0,0,0.12);
  border: 1px solid #1e293b;
}
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 1.25rem;
  background: linear-gradient(90deg, #0f172a 0%, #1a2744 100%);
  border-bottom: 1px solid #334155;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.code-header-left {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.code-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.dot-red    { background: #ff5f57; box-shadow: 0 0 0 1px rgba(255,95,87,0.4); }
.dot-yellow { background: #febc2e; box-shadow: 0 0 0 1px rgba(254,188,46,0.4); }
.dot-green  { background: #28c840; box-shadow: 0 0 0 1px rgba(40,200,64,0.4); }
.code-filename {
  color: #94a3b8;
  margin-left: 0.4rem;
  letter-spacing: 0.01em;
}
.code-lang {
  background: rgba(37,99,235,0.18);
  border: 1px solid rgba(37,99,235,0.35);
  padding: 0.15rem 0.55rem;
  border-radius: 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: #93c5fd;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.code-block {
  margin: 0;
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  background: #0d1117;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.85;
  color: #c9d1d9;
  border-left: 3px solid #1d4ed8;
}
.code-block code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}
.code-comment  { color: #4b6382; font-style: italic; }
.tok-key       { color: #93c5fd; }
.tok-str       { color: #86efac; }
.tok-num       { color: #fbbf24; }
.tok-null      { color: #e879f9; font-style: italic; }
.tok-punc      { color: #64748b; }
.tok-ellipsis  { color: #475569; }

/* ── Timeline ─────────────────────────────────────────────────────── */
.timeline {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0.55rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: var(--gray-200);
}
.tl-item {
  position: relative;
  padding: 0 0 2rem 2rem;
  display: flex;
  flex-direction: column;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -1.35rem;
  top: 0.35rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--gray-300);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--gray-300);
  transition: all var(--transition);
}
.tl-item.done .tl-dot   { background: var(--green); box-shadow: 0 0 0 2px var(--green); }
.tl-item.active .tl-dot { background: var(--blue); box-shadow: 0 0 0 3px var(--blue-light), 0 0 0 5px rgba(37,99,235,0.2); }

.tl-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.2rem;
}
.tl-item.done .tl-date   { color: var(--green); }
.tl-item.active .tl-date { color: var(--blue); }

.tl-event {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-800);
}

/* ── Steps / Participate ──────────────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}
.step {
  padding: 2rem;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.step-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 1;
  margin-bottom: 0.75rem;
  font-family: var(--mono);
}
.step h3 { font-size: 1.1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.75rem; }
.step p  { font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 1.25rem; }

.connect-row {
  text-align: center;
  padding: 2rem;
  background: var(--gray-50);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}
.connect-row h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; color: var(--gray-800); }
.connect-links {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 560px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.connect-links li {
  font-size: 0.9rem;
  color: var(--gray-600);
  padding-left: 0.25rem;
  line-height: 1.5;
}
.connect-links li a {
  font-weight: 600;
  color: var(--blue);
}
.connect-links li a:hover { text-decoration: underline; }

/* ── Working Notes ────────────────────────────────────────────────── */
.wn-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.wn-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.wn-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0.6rem 0 0.6rem;
}
.wn-card p {
  font-size: 0.88rem;
  color: var(--gray-600);
  line-height: 1.65;
}
.wn-icon {
  font-size: 1.6rem;
  line-height: 1;
}
.wn-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.wn-list li {
  font-size: 0.85rem;
  color: var(--gray-600);
  padding-left: 1rem;
  position: relative;
  line-height: 1.5;
}
.wn-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}
@media (max-width: 900px) {
  .wn-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .wn-grid { grid-template-columns: 1fr; }
}

/* ── Register ─────────────────────────────────────────────────────── */
.section-register {
  background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 50%, #0891b2 100%);
  padding: 5rem 0;
}
.register-box {
  display: flex;
  align-items: center;
  gap: 3rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 3rem;
  backdrop-filter: blur(8px);
}
.register-text { flex: 1; color: #fff; }
.register-text h2 { font-size: 1.75rem; font-weight: 800; margin-bottom: 1rem; }
.register-text p  { font-size: 0.95rem; opacity: 0.85; line-height: 1.7; margin-bottom: 1.25rem; }
.register-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.register-list li { font-size: 0.9rem; opacity: 0.9; }

.register-action { flex-shrink: 0; text-align: center; }
.register-note { margin-top: 0.75rem; font-size: 0.8rem; color: rgba(255,255,255,0.65); }

/* ── Organizers ───────────────────────────────────────────────────── */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
}
.organizer {
  text-align: center;
  padding: 1.5rem 1rem;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.organizer:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.organizer-avatar {
  width: 88px; height: 88px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 0.9rem;
  border: 3px solid var(--gray-200);
  box-shadow: 0 2px 10px rgba(0,0,0,0.10);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.organizer:hover .organizer-avatar {
  border-color: var(--blue);
  box-shadow: 0 4px 16px rgba(37,99,235,0.18);
}
.organizer-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.org-inst-logo {
  height: 90px;
  width: auto;
  object-fit: contain;
  margin-top: 0.6rem;
  opacity: 0.85;
}
.organizer-avatar-link { display: block; text-decoration: none; }
.organizer-name { font-weight: 700; font-size: 0.95rem; color: var(--gray-900); margin-bottom: 0.15rem; }
.organizer-name a { color: inherit; text-decoration: none; }
.organizer-name a:hover { color: var(--blue); text-decoration: underline; }
.organizer-role { font-size: 0.78rem; color: var(--blue); font-weight: 600; margin-bottom: 0.15rem; }
.organizer-inst { font-size: 0.78rem; color: var(--gray-500); margin-bottom: 0.75rem; }
.organizer-bio  { font-size: 0.78rem; color: var(--gray-600); line-height: 1.5; }

/* ── Related Work ─────────────────────────────────────────────────── */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.related-card {
  padding: 1.5rem;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all var(--transition);
}
.related-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--blue); text-decoration: none; }
.related-icon { font-size: 1.5rem; }
.related-name { font-weight: 700; font-size: 0.95rem; color: var(--gray-900); }
.related-desc { font-size: 0.82rem; color: var(--gray-500); line-height: 1.5; }

/* ── Footer ───────────────────────────────────────────────────────── */
.footer {
  background: var(--gray-900);
  color: #fff;
  padding: 4rem 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.footer-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}
.footer-brand p { font-size: 0.88rem; opacity: 0.55; line-height: 1.7; max-width: 300px; }
.footer-inst-logo {
  height: 64px;
  width: auto;
  object-fit: contain;
  margin-top: 1rem;
  opacity: 1;
  filter: brightness(0) invert(1);
}
.footer-links { display: flex; gap: 3rem; }
.footer-col { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col-title { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; opacity: 0.4; margin-bottom: 0.25rem; }
.footer-col a { font-size: 0.88rem; opacity: 0.7; color: #fff; text-decoration: none; transition: opacity var(--transition); }
.footer-col a:hover { opacity: 1; text-decoration: none; }
.footer-bottom {
  padding: 1.25rem 0;
  font-size: 0.82rem;
  opacity: 0.45;
}
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }
.footer-bottom a { color: #fff; opacity: 0.8; }

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .organizers-grid { grid-template-columns: repeat(3, 1fr); }
  .related-grid    { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0;
    background: var(--gray-900);
    padding: 5rem 2rem 2rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a { color: #fff !important; font-size: 1.05rem; padding: 0.6rem 0.5rem; width: 100%; }
  .nav-links .nav-cta { background: var(--blue) !important; color: #fff !important; border-radius: 0.5rem; }
  .nav-hamburger { display: flex; z-index: 101; }

  .hero-stats { gap: 0.5rem; flex-direction: column; padding: 1.25rem; }
  .stat-divider { width: 80%; height: 1px; }

  .about-grid    { grid-template-columns: 1fr; }
  .tracks-grid   { grid-template-columns: 1fr; }
  .eval-grid     { grid-template-columns: 1fr; }
  .steps-grid    { grid-template-columns: 1fr; }
  .organizers-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid  { grid-template-columns: repeat(2, 1fr); }

  .register-box  { flex-direction: column; padding: 2rem; text-align: center; }
  .footer-inner  { grid-template-columns: 1fr; }
  .footer-links  { flex-wrap: wrap; gap: 2rem; }
}

@media (max-width: 480px) {
  .organizers-grid { grid-template-columns: 1fr; }
  .related-grid    { grid-template-columns: 1fr; }
  .hero-stats .stat { padding: 0 1rem; }
}