:root {
  color-scheme: dark;
  --bg: #121722;
  --card: #1d2533;
  --text: #f4f7fb;
  --muted: #b8c2d1;
  --accent: #48b879;
  --gold: #e5b957;
  --danger: #e66a5e;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(160deg, #121722, #182131);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main {
  width: min(880px, calc(100% - 32px));
  margin: 48px auto;
  padding: clamp(24px, 5vw, 56px);
  background: var(--card);
  border-radius: 28px;
  box-shadow: 0 20px 60px rgb(0 0 0 / 28%);
}
h1, h2 { line-height: 1.2; }
h1 { margin-top: 0; font-size: clamp(2rem, 7vw, 3.4rem); }
h2 { margin-top: 2rem; color: var(--gold); }
a { color: #72d7a0; }
.notice {
  padding: 16px 20px;
  border-left: 4px solid var(--danger);
  background: rgb(230 106 94 / 10%);
  border-radius: 10px;
}
.muted { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
footer { margin-top: 40px; color: var(--muted); font-size: .9rem; }