:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #182032;
  --muted: #5e687b;
  --line: #dfe4ed;
  --brand: #3157d5;
  --brand-dark: #203a9b;
  --accent: #eaf0ff;
  --dark: #131a2b;
  --max: 1160px;
  --radius: 18px;
  --shadow: 0 20px 55px rgba(25, 38, 75, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Inter", system-ui, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

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

.narrow {
  max-width: 820px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(223, 228, 237, 0.85);
  background: rgba(247, 248, 251, 0.92);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

nav a:hover {
  color: var(--brand);
}

.hero {
  padding: 96px 0 84px;
  background:
    radial-gradient(circle at 80% 15%, rgba(78, 111, 227, 0.17), transparent 32rem),
    linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.75fr);
  gap: 70px;
  align-items: center;
}

.eyebrow,
.section-label,
.card-kicker {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Source Serif 4", Georgia, serif;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.65rem, 6vw, 5.2rem);
  line-height: 1.02;
}

h2 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.1;
}

h3 {
  margin: 0 0 9px;
  line-height: 1.3;
}

.hero-copy {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 34px 0 40px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  color: white;
  background: var(--brand);
}

.button.primary:hover {
  background: var(--brand-dark);
}

.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface);
}

.quick-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.quick-facts div {
  display: grid;
  gap: 3px;
}

.fact-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-card {
  padding: 30px;
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 26px;
  background: rgba(255,255,255,0.82);
  box-shadow: var(--shadow);
}

.modality-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.modality-grid span {
  padding: 11px 12px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--brand-dark);
  font-size: 0.86rem;
  font-weight: 700;
  text-align: center;
}

.hero-card-note {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.section {
  padding: 88px 0;
}

.section.muted {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #f0f3f8;
}

.section.dark {
  color: white;
  background: var(--dark);
}

.section-label.light {
  color: #a9baff;
}

.lead,
.section-intro {
  color: var(--muted);
  font-size: 1.1rem;
}

.cards {
  display: grid;
  gap: 18px;
  margin-top: 36px;
}

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

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

.card {
  min-height: 100%;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.card-number {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--brand);
  font-size: 0.8rem;
  font-weight: 800;
}

.timeline {
  max-width: 930px;
  margin-top: 42px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.timeline-item:last-child {
  border-bottom: 1px solid var(--line);
}

.timeline-item time {
  color: var(--brand);
  font-weight: 800;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.timeline-item.break {
  opacity: 0.78;
}

.timeline-item.emphasis {
  margin: 8px -20px;
  padding: 26px 20px;
  border: 0;
  border-radius: var(--radius);
  background: var(--accent);
}

.notice {
  margin-top: 28px;
  padding: 18px 20px;
  border-left: 4px solid var(--brand);
  background: var(--surface);
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 70px;
  align-items: start;
}

.participation-box {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.participation-box h3:not(:first-child) {
  margin-top: 26px;
}

.participation-box ul {
  padding-left: 20px;
}

.organizer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.organizer {
  display: flex;
  gap: 16px;
  padding: 24px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.045);
}

.organizer a {
  text-decoration: none;
}

.organizer a:hover {
  color: #a9baff;
}

.organizer p {
  margin: 0;
  color: #b8c0d2;
  font-size: 0.9rem;
}

.avatar {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--dark);
  background: #a9baff;
  font-weight: 800;
}

footer {
  padding: 26px 0;
  color: var(--muted);
  background: #0d1321;
}

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

.footer-wrap p {
  margin: 0;
}

.footer-wrap a {
  color: white;
}

@media (max-width: 900px) {
  .hero-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 40px;
  }

  .cards.four,
  .cards.three,
  .organizer-grid {
    grid-template-columns: 1fr 1fr;
  }

  nav {
    display: none;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-top: 64px;
  }

  .section {
    padding: 68px 0;
  }

  .cards.four,
  .cards.three,
  .organizer-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .timeline-item.emphasis {
    margin-left: 0;
    margin-right: 0;
  }

  .quick-facts,
  .footer-wrap {
    flex-direction: column;
  }
}