:root{--fg:#1d1f21;--muted:#5b6168;--bg:#fff;--line:#dfe2e6;--accent:#1f4e8c;--soft:#f4f6f8;--warn:#fff7e0}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.55;color:var(--fg);background:var(--bg)}
header,main,footer{max-width:900px;margin:0 auto;padding:0 1rem}
header{padding-top:1.5rem;border-bottom:1px solid var(--line)}
header p{color:var(--muted);margin:.25rem 0 1rem}
nav{display:flex;gap:1rem;flex-wrap:wrap;padding-bottom:.75rem;font-size:.95rem}
nav a{color:var(--accent);text-decoration:none}
nav a[aria-current]{font-weight:600;text-decoration:underline}
h1{font-size:1.6rem;line-height:1.25;margin:.2rem 0}
h2{font-size:1.3rem;margin-top:2.2rem;border-bottom:1px solid var(--line);padding-bottom:.25rem}
h3{font-size:1.08rem;margin-top:1.6rem}
a{color:var(--accent)}
code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em;background:var(--soft);padding:.05em .3em;border-radius:3px;word-break:break-all}
.box{background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:.9rem 1.1rem;margin:1rem 0}
.box.caveat{background:var(--warn)}
.box ul{margin:.4rem 0;padding-left:1.2rem}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1rem 0}
table{border-collapse:collapse;width:100%;font-size:.9rem}
th,td{border:1px solid var(--line);padding:.4rem .55rem;text-align:left;vertical-align:top}
th{background:var(--soft)}
td.n{white-space:nowrap}
figure{margin:1.2rem 0}
figure img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:4px}
figcaption{font-size:.88rem;color:var(--muted)}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.hash{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.78rem;word-break:break-all}
footer{border-top:1px solid var(--line);margin-top:3rem;padding-top:1rem;padding-bottom:2rem;color:var(--muted);font-size:.88rem}
@media (max-width:600px){h1{font-size:1.35rem}table{font-size:.82rem}}