:root{--bg:#F4F1EA;--fg:#1C2320;--muted:#6B7670;--card:#fff;--border:#DED8CC;--primary:#3E614F}
@media (prefers-color-scheme:dark){:root{--bg:#121614;--fg:#E5EAE7;--muted:#9CA7A2;--card:#1D2421;--border:#2E3A34;--primary:#75A187}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:8px}
header img{width:40px;height:40px;border-radius:10px}
header a{color:var(--fg);text-decoration:none;font-weight:700;font-size:20px}
nav.lang{margin:8px 0 24px;font-size:14px}
nav.lang a{color:var(--primary);margin-right:16px}
h1{font-size:26px;margin:16px 0 4px}
h2{font-size:18px;margin:28px 0 8px}
p,li{color:var(--fg)}
.meta{color:var(--muted);font-size:14px}
section.lang-block{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:8px 24px 24px;margin-bottom:32px}
a{color:var(--primary)}
footer{color:var(--muted);font-size:14px;margin-top:24px}
h3{font-size:16px;margin:20px 0 4px}