:root{--bg:#fff;--fg:#1f2933;--muted:#5f6b7a;--line:#e3e7ec;--soft:#f4f6f8;--accent:#7a3e5c;--accent-soft:#e8f1f8;--warn:#8a4b0f;--warn-soft:#fdf3e6}@media (prefers-color-scheme:dark){:root{--bg:#12161b;--fg:#e6eaef;--muted:#9aa5b1;--line:#2a323b;--soft:#1a2027;--accent:#7db7e0;--accent-soft:#1b2a36;--warn:#f0b36b;--warn-soft:#2b2116}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--fg);margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,Yu Gothic UI,sans-serif;line-height:1.8}a{color:var(--accent)}.wrap{max-width:860px;margin:0 auto;padding:0 16px}header.site{border-bottom:1px solid var(--line)}header.site .wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding-top:12px;padding-bottom:12px;display:flex}header.site .brand{color:var(--fg);font-size:1.05rem;font-weight:700;text-decoration:none}header.site nav{flex-wrap:wrap;gap:16px;font-size:.92rem;display:flex}header.site nav 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