:root {
  --lake-900: #0d3653;
  --lake-700: #1f6fa7;
  --lake-500: #5fb7de;
  --forest-900: #173f2e;
  --forest-700: #2f7b53;
  --forest-500: #72bf7b;
  --sand-100: #f7f5ef;
  --sand-200: #efe9db;
  --ink: #1d2933;
  --muted: #53626f;
  --white: #ffffff;
  --line: rgba(13, 54, 83, 0.12);
  --shadow: 0 20px 48px rgba(14, 35, 49, 0.10);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(95, 183, 222, 0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(114, 191, 123, 0.16), transparent 22%),
    var(--sand-100);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; }
.small { font-size: 0.95rem; color: var(--muted); }
.tagline { font-size: 1.08rem; color: var(--muted); }
.eyebrow, .section-label {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--forest-700);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255,255,255,0.55);
  backdrop-filter: blur(14px);
  background: rgba(247,245,239,0.82);
}
.nav-wrap, .footer-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
  font-weight: 800;
}
.brand img { width: 44px; height: 44px; }
.brand-copy { display: grid; gap: 0.05rem; }
.brand-title { font-size: 1rem; }
.brand-sub { font-size: 0.78rem; color: var(--muted); }
.nav {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.nav a {
  padding: 0.35rem 0.2rem;
  color: var(--muted);
  font-weight: 600;
}
.nav a:hover, .lang-switch a:hover, .footer-links a:hover { color: var(--lake-900); }
.lang-switch {
  display: inline-flex;
  gap: 0.4rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.7);
}
.lang-switch a {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
}
.lang-switch a.active {
  background: linear-gradient(135deg, var(--lake-700), var(--forest-700));
  color: white;
}
.header-tools { display: inline-flex; align-items: center; gap: 0.8rem; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 4rem 0 2rem;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('assets/topo-pattern.svg') center/cover no-repeat;
  opacity: 0.32;
  pointer-events: none;
}
.hero-grid, .split-grid, .facts-grid, .card-grid, .footer-grid {
  display: grid;
  gap: 1.5rem;
}
.hero-grid {
  position: relative;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
}
.hero-card, .panel, .quote-panel, .cta-panel {
  background: rgba(255,255,255,0.76);
  border: 1px solid rgba(255,255,255,0.85);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
}
.hero-card { padding: 2rem; }
.hero h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
  max-width: 10ch;
  color: var(--lake-900);
}
.lead {
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 62ch;
}
.hero-actions, .button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.65rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(14,35,49,0.12); }
.button-primary {
  background: linear-gradient(135deg, var(--lake-700), var(--forest-700));
  color: white;
}
.button-secondary {
  background: rgba(255,255,255,0.74);
  color: var(--lake-900);
  border-color: var(--line);
}
.hero-visual {
  padding: 1rem;
  position: relative;
}
.logo-showcase {
  background: linear-gradient(180deg, rgba(255,255,255,0.85), rgba(255,255,255,0.68));
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 32px;
  padding: 1.4rem;
  box-shadow: var(--shadow);
}
.logo-showcase img { width: 100%; max-width: 420px; margin: 0 auto; }
.logo-caption {
  margin: 0.8rem 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

main section { padding: 1.25rem 0; }
.section-intro {
  max-width: 74ch;
  margin-bottom: 1.2rem;
}
.section-intro h2, .split-grid h2, .quote-panel h2, .rules-intro h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--lake-900);
}
.section-intro p, .split-grid p, .panel p, .hero-card p, .quote-panel p, .cta-panel p { color: var(--muted); }

.facts-grid { grid-template-columns: repeat(4, 1fr); }
.fact {
  padding: 1.2rem;
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.85);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}
.fact strong { display: block; font-size: 1.1rem; color: var(--forest-900); }
.fact span { color: var(--muted); font-size: 0.95rem; }

.split-grid { grid-template-columns: 1fr 1fr; align-items: center; }
.illustration-card, .panel, .quote-panel, .cta-panel {
  padding: 1.5rem;
}
.panel.soft {
  background: linear-gradient(180deg, rgba(95,183,222,0.10), rgba(114,191,123,0.10)), rgba(255,255,255,0.82);
}
.card-grid { grid-template-columns: repeat(3, 1fr); }
.info-card, .sponsor-slot {
  padding: 1.3rem;
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(255,255,255,0.86);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}
.info-card h3, .sponsor-slot h3 {
  margin: 0 0 0.5rem;
  color: var(--forest-900);
  font-size: 1.12rem;
}
.info-card p, .sponsor-slot p { margin: 0; color: var(--muted); }
.sponsor-slot {
  text-align: center;
  border: 2px dashed rgba(31, 111, 167, 0.22);
  background: rgba(255,255,255,0.55);
}

.quote-panel {
  background: linear-gradient(135deg, rgba(31,111,167,0.12), rgba(114,191,123,0.14)), rgba(255,255,255,0.84);
}
.quote-panel blockquote {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 800;
  color: var(--lake-900);
}
.quote-panel .quote-note { margin-top: 0.9rem; }

.rules-layout {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 0.92fr 1.08fr;
}
.rules-menu {
  position: sticky;
  top: 92px;
  align-self: start;
}
.rules-menu ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.rules-menu li + li { margin-top: 0.4rem; }
.rule-block { margin-bottom: 1.15rem; }
.rule-block h3 {
  margin: 0 0 0.45rem;
  color: var(--forest-900);
  font-size: 1.12rem;
}
.rule-block p, .rule-block li { color: var(--muted); }
.rule-block ul { margin: 0.5rem 0 0; padding-left: 1.2rem; }
.rule-block li + li { margin-top: 0.35rem; }
.callout {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(95,183,222,0.10), rgba(114,191,123,0.10));
  border: 1px solid rgba(31,111,167,0.14);
}

.cta-panel {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  background: linear-gradient(135deg, rgba(31,111,167,0.12), rgba(114,191,123,0.16)), rgba(255,255,255,0.84);
}
.mail-link {
  font-size: clamp(1.15rem, 3vw, 1.6rem);
  font-weight: 800;
  color: var(--lake-900);
  word-break: break-word;
}

.site-footer {
  padding: 1.8rem 0 2.3rem;
}
.footer-wrap {
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}
.footer-links {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
}
.footer-note { color: var(--muted); font-size: 0.95rem; }

@media (max-width: 1000px) {
  .hero-grid, .split-grid, .rules-layout, .cta-panel { grid-template-columns: 1fr; }
  .facts-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .rules-menu { position: static; }
}
@media (max-width: 760px) {
  .nav-wrap, .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.9rem 0;
  }
  .header-tools { width: 100%; justify-content: space-between; }
  .hero { padding-top: 3rem; }
  .hero-card, .panel, .quote-panel, .cta-panel, .illustration-card { padding: 1.2rem; }
  .facts-grid { grid-template-columns: 1fr; }
}