:root{color-scheme:light;--bg:#faf6f4;--surface:#fff;--ink:#3b2a31;--sub:#7d6872;--line:#eadfe3;--accent:#c93d6f}
@media (prefers-color-scheme:dark){:root{color-scheme:dark;--bg:#17141a;--surface:#211c23;--ink:#f1e7ec;--sub:#b3a0aa;--line:#382f39;--accent:#f27aa0}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Yu Gothic UI","Noto Sans JP","Meiryo",system-ui,sans-serif;line-height:1.85;font-size:15px;padding-inline:16px}
main{max-width:760px;margin:0 auto;padding-block:32px 64px}
header .brand{font-weight:800;color:var(--accent);font-size:13px;letter-spacing:.06em}
h1{font-size:1.6rem;margin:.3em 0 .2em;text-wrap:balance}
.meta{color:var(--sub);font-size:13px;margin:0 0 24px}
h2{font-size:1.1rem;margin:2.2em 0 .5em;padding-top:1em;border-top:1px solid var(--line)}
h3{font-size:1rem;margin:1.4em 0 .3em}
p,li{max-width:68ch}
ul{padding-left:1.3em}
li{margin:.25em 0}
.box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:12px 0}
a{color:var(--accent)}
footer{margin-top:48px;color:var(--sub);font-size:13px;border-top:1px solid var(--line);padding-top:16px}
nav.toc{font-size:14px}
nav.toc a{text-decoration:none}