:root {
  --bg:#f8fafc;
  --fg:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --accent:#166534;
  --accent-strong:#14532d;
  --card:#ffffff;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; color: var(--fg); background: var(--bg); line-height: 1.55; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header.site { background: #fff; border-bottom: 1px solid var(--border); padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; }
header.site .brand { font-weight: 700; font-size: 18px; color: var(--fg); }
header.site nav a { font-size: 14px; }
main { max-width: 880px; margin: 0 auto; padding: 28px 20px 64px; }
h1 { font-size: clamp(24px, 4vw, 34px); line-height: 1.2; margin: 0 0 12px; }
.lede { font-size: 17px; color: var(--muted); margin: 0 0 28px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 22px; margin-bottom: 22px; }
table.tiers { width: 100%; border-collapse: collapse; font-size: 15px; }
table.tiers th, table.tiers td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.tiers th { font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; background: #f1f5f9; }
table.tiers td.tier { white-space: nowrap; }
table.tiers td.tier .pct { display: block; color: var(--muted); font-size: 12px; font-weight: 500; margin-top: 2px; }
table.tiers td.value { font-variant-numeric: tabular-nums; font-weight: 600; font-size: 17px; white-space: nowrap; }
table.tiers td.meaning { color: #334155; font-size: 14px; }
.siblings { display: grid; grid-template-columns: 1fr; gap: 18px; margin-top: 22px; }
@media (min-width: 720px) { .siblings { grid-template-columns: 1fr 1fr; } }
.siblings h3 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin: 0 0 10px; }
.siblings ul { list-style: none; padding: 0; margin: 0; }
.siblings li { padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.cta { background: linear-gradient(135deg, var(--accent-strong), var(--accent)); color: #fff; padding: 24px; border-radius: 12px; text-align: center; margin-top: 26px; }
.cta h2 { margin: 0 0 8px; font-size: 20px; color: #fff; }
.cta p { margin: 0 0 16px; color: rgba(255,255,255,0.92); }
.cta a.btn { display: inline-block; background: #fff; color: var(--accent-strong); padding: 10px 22px; border-radius: 8px; font-weight: 600; }
.source { margin-top: 28px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); padding-top: 16px; }
footer.site { text-align: center; padding: 24px 20px; font-size: 13px; color: var(--muted); }
.hub-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .hub-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .hub-grid { grid-template-columns: 1fr 1fr 1fr; } }
.hub-grid .card h2 { margin: 0 0 10px; font-size: 16px; }
.event-list { list-style: none; padding: 0; margin: 0; font-size: 14px; line-height: 1.9; }