:root {
  --bg: #fbfaf7;
  --text: #1f1d1a;
  --muted: #6b665e;
  --line: #e4e0d8;
  --accent: #b5651d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17161a;
    --text: #ecebe8;
    --muted: #a19d96;
    --line: #2f2d33;
    --accent: #f0a35e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  font-size: 16px;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 80px; }
h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 40px 0 8px; padding-top: 16px; border-top: 1px solid var(--line); }
p, li { margin: 8px 0; }
ul, ol { padding-left: 1.4em; }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
a { color: var(--accent); }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
footer { margin-top: 56px; color: var(--muted); font-size: 0.9rem; }