:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #14161a;
  --muted: #656b75;
  --line: #e3e6eb;
  --blue: #1677ff;
  --warn: #a34200;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #191c22;
    --text: #f5f6f8;
    --muted: #a7adb8;
    --line: #303540;
    --blue: #5aa2ff;
    --warn: #ffad66;
  }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.65; }
main { width: min(760px, calc(100% - 32px)); margin: 40px auto 64px; }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 28px; }
a { color: var(--blue); }
h1 { margin: 0 0 8px; font-size: clamp(30px, 7vw, 46px); line-height: 1.2; }
h2 { margin-top: 0; font-size: 21px; }
.subtitle, .meta { color: var(--muted); }
.card { margin-top: 18px; padding: 22px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; }
.warning { color: var(--warn); }
ul { padding-left: 22px; }
footer { margin-top: 32px; color: var(--muted); font-size: 14px; }
code { overflow-wrap: anywhere; }