:root{--bg:#faf8ff;--fg:#1f1d2b;--muted:#5d5a6e;--accent:#6b55c9;--card:#fff;--line:#e4def7}
@media (prefers-color-scheme:dark){:root{--bg:#16141f;--fg:#ece9f7;--muted:#a9a4c0;--accent:#b6a6ff;--card:#1f1c2b;--line:#2f2a42}}
*{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:40px 20px 80px}
header{display:flex;align-items:center;gap:14px;margin-bottom:28px}header img{width:64px;height:64px;border-radius:14px}
h1{font-size:1.9rem;margin:0}h2{font-size:1.25rem;margin:2.2em 0 .6em}p.lead{font-size:1.1rem;color:var(--muted)}
a{color:var(--accent)}nav{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);font-size:.92rem;color:var(--muted)}nav a{margin-right:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:14px 0}
ul{padding-left:1.3em}code{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:1px 5px;font-size:.92em}
small{color:var(--muted)}