:root {
  color-scheme: dark;
  --background: #0b1426;
  --card: #111a2b;
  --text: #f7fafc;
  --muted: #a8b5c5;
  --accent: #86e1c6;
  --border: rgba(255, 255, 255, 0.1);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(160deg, #0b1426, #080d18);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { width: min(820px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 80px; }
header { margin-bottom: 32px; }
.brand { color: var(--accent); font-size: 18px; font-weight: 800; text-decoration: none; }
h1 { margin: 16px 0 8px; font-size: clamp(32px, 7vw, 48px); line-height: 1.1; }
h2 { margin-top: 32px; font-size: 21px; }
p, li { color: var(--muted); }
a { color: var(--accent); }
.updated { font-size: 14px; }
.card { padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: var(--card); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button { padding: 12px 18px; border-radius: 12px; background: var(--accent); color: #071019; font-weight: 700; text-decoration: none; }
.button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }