:root{--fg:#1f2328;--muted:#6b7280;--line:#e5e7eb;--accent:#e8590c;--bg:#fff}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Noto Sans KR","Noto Sans SC","Noto Sans TC",sans-serif;color:var(--fg);background:var(--bg);line-height:1.85;-webkit-text-size-adjust:100%}
.wrap{max-width:760px;margin:0 auto;padding:24px 20px 72px}
header.site{border-bottom:1px solid var(--line);margin-bottom:28px;padding-bottom:16px;display:flex;flex-wrap:wrap;gap:12px;align-items:baseline;justify-content:space-between}
header.site a.brand{font-weight:700;font-size:18px;color:var(--fg);text-decoration:none;letter-spacing:.02em}
nav.langs{font-size:13px;color:var(--muted)}
nav.langs a{color:var(--muted);text-decoration:none;margin-left:10px;border-bottom:1px solid transparent}
nav.langs a:hover{color:var(--accent);border-bottom-color:var(--accent)}
nav.langs a[aria-current]{color:var(--fg);font-weight:600}
h1{font-size:24px;line-height:1.45;margin:0 0 4px}
h2{font-size:17px;margin:34px 0 8px;padding-top:4px}
h3{font-size:15px;margin:22px 0 6px;color:#374151}
p{margin:10px 0}
ul,ol{margin:10px 0;padding-left:1.6em}
li{margin:5px 0}
a{color:var(--accent)}
.lead{color:var(--muted);font-size:14px;margin:0 0 24px}
footer.site{margin-top:56px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
footer.site a{color:var(--muted);margin-right:14px}
.cards{display:grid;gap:12px;margin:24px 0}
.card{border:1px solid var(--line);border-radius:10px;padding:14px 16px}
.card a{font-weight:600;text-decoration:none}
.card p{margin:4px 0 0;font-size:13px;color:var(--muted)}
@media(prefers-color-scheme:dark){:root{--fg:#e6e6e6;--muted:#9aa0a6;--line:#33363b;--bg:#16181c}h3{color:#c8ccd2}}