:root {
  color-scheme: light;
  --bg: #f4f2ee; --surface: #fdfcfa; --border: #e2ded6; --text: #1d1c1a; --text-2: #55524c; --muted: #85817a;
  --accent: #3b7a3e; --accent-ink: #fff; --accent-soft: #e6f0e4; --danger: #c2413a; --warn-soft: #fbf0dc; --track: #e8e4dc;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --bg: #131312; --surface: #1c1c1a; --border: #302f2b; --text: #eeece6; --text-2: #c2bfb6; --muted: #8e8a82;
    --accent: #6cb86f; --accent-ink: #0f1a10; --accent-soft: #1f2b1f; --danger: #e5675f; --warn-soft: #2e2716; --track: #2a2a27;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.7 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; }
a { color: var(--accent); }
.site-head { border-bottom: 1px solid var(--border); background: var(--surface); }
.site-head .in { max-width: 1160px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; color: var(--text); text-decoration: none; }
.brand img { width: 26px; height: 26px; }
.site-head nav { display: flex; gap: 14px; font-size: 14px; margin-left: auto; }
.site-head nav a { color: var(--text-2); text-decoration: none; }
.site-head nav a:hover, .site-head nav a[aria-current] { color: var(--text); text-decoration: underline; }
main { max-width: 1160px; margin: 0 auto; padding: 22px 16px 40px; }
main.doc { max-width: 760px; }
h1 { font-size: 22px; margin: 0; letter-spacing: .02em; }
.lead { color: var(--text-2); margin: 4px 0 18px; }
.doc h2 { font-size: 18px; margin: 28px 0 8px; }
.doc h3 { font-size: 15px; margin: 18px 0 4px; }
.doc p, .doc li { color: var(--text-2); }
.doc code { background: var(--track); padding: 0 5px; border-radius: 4px; font-size: 13px; color: var(--text); }
.site-foot { border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
.site-foot .in { max-width: 1160px; margin: 0 auto; padding: 18px 16px 28px; }
.site-foot nav { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.site-foot a { color: var(--text-2); }
.ad { margin: 16px 0; text-align: center; }
.ad .ad-label { font-size: 11px; color: var(--muted); text-align: left; margin-bottom: 2px; }
.ad:not(.ready) { display: none; }
.note { background: var(--warn-soft); border-radius: 10px; padding: 10px 12px; font-size: 13px; color: var(--text-2); }