:root{--bg:#fbfbf9;--fg:#1c2127;--muted:#59636e;--accent:#0b5cad;--line:#d9dde1;--code-bg:#eef1f4}
@media (prefers-color-scheme:dark){:root{--bg:#10151a;--fg:#e4e8ec;--muted:#9aa5b1;--accent:#7db5ee;--line:#2b343d;--code-bg:#1a222a}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 system-ui,-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif}
.wrap{max-width:42rem;margin:0 auto;padding:1.5rem 16px 3rem}
header{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap}
.brand{font-weight:700;font-size:1.1rem}
.lang a{color:var(--muted)}
h1{font-size:1.9rem;line-height:1.3;margin:2rem 0 .5rem}
h2{font-size:1.2rem;margin:2.2rem 0 .4rem;padding-top:1rem;border-top:1px solid var(--line)}
.lead{font-size:1.1rem;color:var(--muted);margin:0 0 1rem}
a{color:var(--accent)}
p,ul{margin:.6rem 0}
ul{padding-left:1.3rem}
pre{background:var(--code-bg);border:1px solid var(--line);border-radius:6px;padding:.8rem 1rem;overflow-x:auto;max-width:100%;margin:.8rem 0}
code{font:.92em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
p code,li code{background:var(--code-bg);padding:.1em .3em;border-radius:3px;overflow-wrap:anywhere}
footer{margin-top:3rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}