:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-2: #eef3fb;
  --text: #1f2937;
  --muted: #5b6472;
  --primary: #164e9f;
  --primary-2: #0f3f83;
  --accent: #d97706;
  --border: #dbe4f0;
  --shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
  --radius: 18px;
  --content: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fbff 0%, #f6f7fb 100%);
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-2); }
.container {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
}
.announcement {
  background: #edf4ff;
  border-bottom: 1px solid #d5e4ff;
  color: #123a71;
  font-size: 0.95rem;
}
.announcement .container {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 0;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,0.84);
  border-bottom: 1px solid rgba(219,228,240,0.9);
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}
.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #4f86d8);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 800;
  box-shadow: var(--shadow);
}
.brand-text { min-width: 0; }
.brand-text .eyebrow {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand-text strong {
  display: block;
  font-size: 1rem;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.1rem;
  align-items: center;
  justify-content: flex-end;
}
.nav a {
  color: var(--text);
  font-weight: 600;
  font-size: 0.96rem;
}
.nav .button {
  color: white;
}
.hero {
  padding: 4.25rem 0 2rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 1.5rem;
  align-items: stretch;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-panel {
  padding: 1.6rem 1.5rem;
}
.kicker {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  background: #eef4ff;
  color: var(--primary);
  border: 1px solid #dbe7ff;
  border-radius: 999px;
  padding: 0.35rem 0.72rem;
  font-weight: 700;
  font-size: 0.78rem;
}
.hero h1 {
  font-size: clamp(1.7rem, 2.5vw, 2.7rem);
  line-height: 1.12;
  margin: 0.75rem 0 0.85rem;
}
.hero p {
  font-size: 0.96rem;
  color: var(--muted);
  max-width: 48ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.2rem;
}
.person-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.button:hover {
  transform: translateY(-1px);
}
.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  box-shadow: 0 10px 24px rgba(22, 78, 159, 0.22);
}
.button.secondary {
  background: white;
  color: var(--text);
  border-color: var(--border);
}
.stats {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
}
.stats img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 0.2rem;
}
.stat {
  padding: 0.95rem 1rem;
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
  border: 1px solid var(--border);
}
.stat strong {
  display: block;
  font-size: 1.18rem;
  margin-bottom: 0.12rem;
}
.section {
  padding: 1.3rem 0 2rem;
}
.section-header {
  margin-bottom: 1.1rem;
}
.section-header h2 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.55rem, 2.6vw, 2.2rem);
}
.section-header p {
  margin: 0;
  color: var(--muted);
}
.grid-4,
.grid-3,
.grid-2 {
  display: grid;
  gap: 1rem;
}
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature, .info-box, .date-box, .speaker, .person, .notice, .topic-box, .submission-box {
  padding: 1.3rem;
}
.feature h3, .info-box h3, .date-box h3, .speaker h3, .person h3, .notice h3, .topic-box h3, .submission-box h3 {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
}
.muted { color: var(--muted); }
.list {
  margin: 0;
  padding-left: 1.1rem;
}
.list li + li { margin-top: 0.45rem; }
.timeline {
  display: grid;
  gap: 0.9rem;
}
.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: white;
}
.timeline-date {
  font-weight: 800;
  color: var(--primary);
}
.table-wrap {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
th, td {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
th {
  background: #f7faff;
  font-size: 0.95rem;
}
tr:last-child td { border-bottom: none; }
.badge {
  display: inline-block;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  background: #fff3dd;
  color: #9a5a00;
}
.page-hero {
  padding: 2.25rem 0 1rem;
}
.page-hero .card {
  padding: 1.75rem;
}
.footer {
  margin-top: 2rem;
  padding: 2rem 0 3rem;
  color: var(--muted);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  padding: 1.35rem;
}
.footer small { font-size: 0.92rem; }
.callout {
  border-left: 4px solid var(--accent);
  padding: 1rem 1rem 1rem 1.1rem;
  background: #fff9f1;
  border-radius: 0 16px 16px 0;
}
.inline-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #eef3fb;
  padding: 0.1rem 0.4rem;
  border-radius: 8px;
}
@media (max-width: 900px) {
  .hero-grid, .grid-4, .grid-3, .grid-2, .footer-grid {
    grid-template-columns: 1fr;
  }
  .timeline-item {
    grid-template-columns: 1fr;
  }
  .nav {
    justify-content: flex-start;
  }
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .stats img {
    height: 320px;
  }
}
@media (max-width: 640px) {
  .hero { padding-top: 3rem; }
  .hero-panel { padding: 1.35rem; }
  .announcement .container {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero h1 {
    font-size: clamp(1.5rem, 7vw, 2.1rem);
  }
  .stats img {
    height: 240px;
  }
}