:root {
  color-scheme: light;
  --indigo: #1e3a8a;
  --teal: #0f766e;
  --orange: #fb923c;
  --slate: #334155;
  --muted: #64748b;
  --line: #dbe3ed;
  --mist: #f8fafc;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--mist);
  color: var(--slate);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
main {
  width: min(820px, calc(100% - 32px));
  margin: 48px auto;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: white;
  box-shadow: 0 14px 40px rgba(30, 58, 138, 0.08);
}
h1, h2 { color: var(--indigo); line-height: 1.25; }
h1 { margin-top: 0; font-size: clamp(2rem, 5vw, 3rem); }
h2 { margin-top: 2rem; font-size: 1.25rem; }
a { color: var(--teal); }
.brand { color: var(--teal); font-weight: 700; }
.meta { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--indigo);
  color: white;
  font-weight: 700;
  text-decoration: none;
}
.button.secondary { background: var(--teal); }
.notice {
  margin: 24px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--orange);
  border-radius: 10px;
  background: #fff7ed;
}
@media (max-width: 600px) {
  main { margin: 16px auto; padding: 24px 20px; }
}