:root {
  --bg: #fbfaf7;
  --fg: #1f1f1d;
  --muted: #5f5f5a;
  --accent: #2f7a4f;
  --rule: #e4e2dc;
  --max: 42rem;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #171716; --fg: #ecece8; --muted: #a7a7a1; --accent: #7cc59a; --rule: #2c2c2a; }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
header, main, footer { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
header { padding-top: 2.5rem; }
header a.brand { color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
nav { margin-top: .5rem; font-size: .95rem; }
nav a { color: var(--muted); text-decoration: none; margin-right: 1rem; }
nav a:hover, main a:hover { text-decoration: underline; }
main { padding: 2rem 1.25rem 3rem; }
main a { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .25rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .5rem; }
p.meta { color: var(--muted); margin: 0 0 1.5rem; font-size: .95rem; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; margin: 1rem 0; }
th, td { text-align: left; vertical-align: top; padding: .5rem .5rem .5rem 0; border-bottom: 1px solid var(--rule); }
th { color: var(--muted); font-weight: 600; }
ul { padding-left: 1.25rem; }
footer { border-top: 1px solid var(--rule); padding: 1.25rem; color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); }