:root {
  color-scheme: dark;
  --bg: #0a1020;
  --panel: rgba(21, 29, 55, 0.92);
  --text: #edf2ff;
  --muted: #b3bfdc;
  --line: rgba(255,255,255,0.08);
  --shadow: 0 18px 44px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(72, 102, 170, 0.22), transparent 35%),
    radial-gradient(circle at top right, rgba(93, 74, 156, 0.18), transparent 32%),
    linear-gradient(180deg, #0d1429 0%, #0a1020 100%);
  color: var(--text);
}

a {
  color: #9fd3ff;
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.page {
  max-width: 1320px;
  margin: 0 auto;
  padding: 36px 22px 60px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 26px;
}

.hero-copy { max-width: 820px; }
.eyebrow, .kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: #9fd3ff;
  margin: 0 0 10px;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.02;
}

.sub {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
  margin-top: 14px;
}

.hero-stamp, .card {
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.hero-stamp {
  min-width: 240px;
  padding: 18px 20px;
  background: linear-gradient(180deg, rgba(37, 49, 88, 0.96), rgba(22, 30, 58, 0.96));
}

.stamp-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12px;
}

.stamp-value {
  margin-top: 8px;
  font-weight: 700;
  line-height: 1.45;
}

.section { margin-top: 22px; }
.section-heading { margin-bottom: 14px; }
.section-heading h2 {
  margin: 0;
  font-size: 1.65rem;
}

.intro-grid,
.use-grid,
.tiers-grid,
.links-grid,
.rules-grid {
  display: grid;
  gap: 18px;
}

.intro-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.use-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tiers-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.links-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rules-grid { grid-template-columns: 1fr; }

.card {
  background: var(--panel);
  padding: 20px 20px 18px;
}

.card h2,
.card h3 {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.card p,
.card li {
  color: var(--text);
  line-height: 1.5;
}

.card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.card li {
  position: relative;
  padding: 10px 0 10px 18px;
}

.card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.6);
}

.with-dividers li + li {
  border-top: 1px solid rgba(255,255,255,0.08);
}

.span-2 { grid-column: span 2; }

.tone-ink {
  background: linear-gradient(180deg, rgba(34, 42, 70, 0.95), rgba(20, 27, 48, 0.96));
}
.tone-blue {
  background: linear-gradient(180deg, rgba(34, 60, 106, 0.92), rgba(20, 34, 61, 0.96));
}
.tone-emerald {
  background: linear-gradient(180deg, rgba(29, 78, 67, 0.9), rgba(16, 43, 37, 0.96));
}
.tone-rose {
  background: linear-gradient(180deg, rgba(83, 43, 65, 0.9), rgba(42, 22, 33, 0.96));
}
.tone-olive {
  background: linear-gradient(180deg, rgba(71, 83, 43, 0.88), rgba(36, 42, 23, 0.96));
}
.tone-plum {
  background: linear-gradient(180deg, rgba(67, 42, 84, 0.9), rgba(34, 21, 43, 0.96));
}
.tone-slate {
  background: linear-gradient(180deg, rgba(39, 48, 82, 0.94), rgba(22, 29, 52, 0.97));
}
.tone-amber {
  background: linear-gradient(180deg, rgba(91, 67, 35, 0.88), rgba(45, 31, 17, 0.96));
}
.tone-teal {
  background: linear-gradient(180deg, rgba(29, 77, 85, 0.9), rgba(17, 40, 46, 0.96));
}
.tone-violet {
  background: linear-gradient(180deg, rgba(63, 50, 98, 0.92), rgba(32, 25, 54, 0.96));
}
.tone-mist {
  background: linear-gradient(180deg, rgba(54, 61, 89, 0.92), rgba(27, 31, 48, 0.96));
}
.tone-gold {
  background: linear-gradient(180deg, rgba(95, 81, 36, 0.88), rgba(49, 39, 17, 0.96));
}

@media (max-width: 1000px) {
  .hero,
  .intro-grid,
  .use-grid,
  .tiers-grid,
  .links-grid {
    grid-template-columns: 1fr 1fr;
  }
  .span-2 { grid-column: span 2; }
}

@media (max-width: 720px) {
  .hero,
  .intro-grid,
  .use-grid,
  .tiers-grid,
  .links-grid,
  .rules-grid {
    grid-template-columns: 1fr;
  }
  .hero { align-items: start; }
  .span-2 { grid-column: span 1; }
}