:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #1c1c22;
  --muted: #5b5f6b;
  --line: #e4e6ee;
  --accent: #0967dd;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f14;
    --panel: #16181f;
    --text: #e9eaef;
    --muted: #9aa0ac;
    --line: #262a33;
    --accent: #5aa2ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 26px;
}
a { color: var(--accent); }
h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 6px; }
h2 { font-size: 1.15rem; margin: 30px 0 8px; }
h3 { font-size: 1rem; margin: 20px 0 6px; }
p, ul { margin: 10px 0; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.updated { color: var(--muted); font-size: .9rem; margin: 0 0 4px; }
.back { display: inline-block; margin-bottom: 24px; font-size: .95rem; }
table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: .95rem; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: rgba(127,127,127,.08); }
footer { margin-top: 40px; color: var(--muted); font-size: .85rem; text-align: center; }