:root {
  --bg: #060b20;
  --bg-alt: #0d1738;
  --card: #132454;
  --text: #eaf1ff;
  --muted: #b5c5e6;
  --accent: #8eb8eb;
  --accent-strong: #6da1df;
  --line: #28457f;
  --shadow: 0 20px 40px rgba(1, 7, 24, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 15%, #162e66 0%, var(--bg) 45%);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(6, 11, 32, 0.82);
  border-bottom: 1px solid rgba(142, 184, 235, 0.2);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.brand {
  font-size: 1.2rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.site-nav {
  display: flex;
  gap: 1.1rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

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

.hero {
  padding: 5rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin: 0 0 0.6rem;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  line-height: 1.1;
  margin: 0 0 0.8rem;
}

.subtitle {
  font-size: 1.2rem;
  margin: 0;
  color: #d8e8ff;
}

.lead {
  color: var(--muted);
  max-width: 64ch;
}

.hero-cta {
  display: flex;
  gap: 0.85rem;
  margin: 1.5rem 0 1.3rem;
  flex-wrap: wrap;
}

.btn {
  border-radius: 999px;
  padding: 0.68rem 1.15rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
  border: 1px solid transparent;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #05204d;
  box-shadow: 0 10px 25px rgba(95, 156, 226, 0.35);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
}

.highlights {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.highlights strong {
  color: var(--accent);
}

.hero-logo-card {
  padding: 1.5rem;
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(20, 41, 92, 0.95), rgba(9, 20, 52, 0.95));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: rgba(11, 25, 63, 0.55);
  border-block: 1px solid rgba(142, 184, 235, 0.12);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

.section-intro {
  color: var(--muted);
}

.stats-grid,
.topic-grid,
.schedule-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat-card,
.topic-card,
.schedule-card,
.cta-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 1rem;
}

.stat-card h3 {
  margin: 0;
  font-size: 2rem;
  color: var(--accent);
}

.stat-card p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.topic-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.topic-card {
  padding: 1.1rem 1.15rem;
}

.topic-index {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.topic-card h3 {
  margin: 0.45rem 0 0;
  font-size: 1.06rem;
  line-height: 1.45;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}

.info-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0.95rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.info-list li:last-child {
  border-bottom: 0;
}

.info-list span {
  color: var(--muted);
}

.note {
  color: var(--muted);
  margin-top: 0.8rem;
}

.schedule-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.schedule-card {
  padding: 1rem 1.2rem;
}

.schedule-card h3 {
  margin-top: 0;
}

.schedule-card ul {
  margin: 0;
  padding-left: 1.05rem;
}

.total {
  margin-bottom: 0;
  margin-top: 0.7rem;
  color: var(--accent);
  font-weight: 700;
}

.cta-section {
  padding-top: 2rem;
}

.cta-card {
  text-align: center;
  padding: 2rem 1.4rem;
}

.site-footer {
  border-top: 1px solid rgba(142, 184, 235, 0.2);
  margin-top: 3rem;
  background: rgba(6, 11, 32, 0.95);
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .stats-grid,
  .topic-grid,
  .two-col,
  .schedule-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}