:root {
  --primary: #243b73;
  --primary-dark: #17284f;
  --accent: #6c63ff;
  --accent-soft: #e8e7ff;
  --bg: #ffffff;
  --muted: #f7f8fc;
  --text: #1f2937;
  --subtext: #5f6b7a;
  --border: #e4e7ef;
  --shadow: 0 18px 50px rgba(22, 35, 73, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--primary-dark);
}

.nav-links {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  font-size: 1.5rem;
  cursor: pointer;
}

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 20% 10%, rgba(108, 99, 255, 0.55), transparent 32%),
    linear-gradient(135deg, #17284f 0%, #243b73 52%, #3b2b76 100%);
  padding: 82px 0 72px;
}

.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-bg::before {
  width: 360px;
  height: 360px;
  right: -100px;
  top: -80px;
}

.hero-bg::after {
  width: 240px;
  height: 240px;
  left: -80px;
  bottom: -90px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 950px;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 800;
  font-size: 0.78rem;
}

.eyebrow {
  color: #d6d8ff;
}

.section-label {
  color: var(--accent);
}

h1,
h2,
h3 {
  line-height: 1.15;
  margin-top: 0;
  letter-spacing: -0.035em;
}

h1 {
  font-size: clamp(2.2rem, 4.5vw, 4.2rem);
  max-width: 1000px;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 22px;
  color: var(--primary-dark);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.hero-subtitle {
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  max-width: 830px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 28px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}

.hero-meta span {
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
  font-size: 0.9rem;
}

.hero-actions,
.resource-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
}

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

.btn.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.36);
}

.btn.disabled {
  color: var(--subtext);
  background: #fff;
  border-color: var(--border);
  pointer-events: none;
}

.section {
  padding: 86px 0;
}

.section-muted {
  background: var(--muted);
}

.two-col {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 60px;
  align-items: start;
}

.lead-card,
.schedule-card,
.topic-card,
.person-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.lead-card {
  padding: 32px;
  font-size: 1.04rem;
}

.lead-card p:first-child {
  margin-top: 0;
}

.lead-card p:last-child {
  margin-bottom: 0;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.topic-card {
  padding: 26px;
}

.icon {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 900;
  margin-bottom: 18px;
}

.schedule-card {
  overflow: hidden;
  margin-top: 22px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--primary);
  color: #fff;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

tbody tr:last-child td {
  border-bottom: 0;
}

td:first-child {
  font-weight: 800;
  color: var(--primary-dark);
  white-space: nowrap;
}

.note {
  color: var(--subtext);
  margin-top: 16px;
}

.person-grid {
  display: grid;
  gap: 22px;
  margin-top: 30px;
}

.person-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.person-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.person-card {
  padding: 26px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.person-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(22, 35, 73, 0.16);
}

.person-card img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 5px solid #fff;
  box-shadow: 0 12px 28px rgba(22, 35, 73, 0.16);
  display: block;
  margin-bottom: 20px;
  background: var(--accent-soft);
}

.person-card.featured img {
  width: 170px;
  height: 170px;
}

.person-card .affiliation {
  margin: -4px 0 14px;
  color: var(--accent);
  font-weight: 800;
}

.person-card p {
  color: var(--subtext);
  font-size: 0.96rem;
}

.compact .person-card {
  box-shadow: none;
}

.compact .person-card img {
  width: 120px;
  height: 120px;
}

.resources {
  text-align: center;
  max-width: 780px;
}

.resources .resource-buttons {
  justify-content: center;
  margin-top: 28px;
}

.footer {
  padding: 34px 0;
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.78);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .topic-grid,
  .person-grid.three,
  .person-grid.four,
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .navbar {
    align-items: flex-start;
    padding: 16px 0;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 66px;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links.show {
    display: flex;
  }

  .hero {
    padding: 90px 0 72px;
  }

  .section {
    padding: 64px 0;
  }

  .topic-grid,
  .person-grid.three,
  .person-grid.four,
  .two-col {
    grid-template-columns: 1fr;
  }

  .lead-card,
  .topic-card,
  .person-card {
    border-radius: 22px;
    padding: 24px;
  }

  .schedule-card {
    overflow-x: auto;
  }

  table {
    min-width: 680px;
  }
}