:root{--bg:#fbfaf8;--fg:#1d1f23;--muted:#5d6370;--line:#e4e1dc;--card:#ffffff;--accent:#1f4e8c;--link:var(--accent);--font:Georgia,"Iowan Old Style","Palatino Linotype",serif}
@media (prefers-color-scheme:dark){:root{--bg:#141518;--fg:#e9e7e3;--muted:#a3a7b0;--line:#2b2d33;--card:#1b1d21;--link:color-mix(in srgb,var(--accent) 40%,#fff)}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 var(--font)}
a{color:var(--link);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.5rem;padding:.9rem 16px}
.brand{font-weight:700;font-size:1.15rem;color:var(--fg);text-decoration:none;letter-spacing:.01em}
.brand small{display:block;font-weight:400;font-size:.8rem;color:var(--muted)}
.menu{display:flex;flex-wrap:wrap;gap:.25rem 1rem;margin-left:auto;font-size:.95rem}
.menu a{color:var(--fg);text-decoration:none;padding:.2rem 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a[aria-current]{border-color:var(--accent)}
.hero{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#000));color:#fff}
.hero .wrap{padding:3rem 16px 2.5rem}.hero h1{margin:0;font-size:clamp(1.7rem,4vw,2.6rem);line-height:1.2}
.hero p{margin:.6rem 0 0;opacity:.9;max-width:60ch}
.wrap{max-width:1040px;margin:0 auto}
main .wrap{padding:2rem 16px 3rem}
article{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:clamp(1.2rem,4vw,2.5rem);overflow-wrap:anywhere}
article h1{font-size:clamp(1.5rem,3.5vw,2.1rem);line-height:1.25;margin-top:0}
article h2,article h3{line-height:1.3;margin:1.8em 0 .6em}
article img{max-width:100%;height:auto;max-height:560px;object-fit:contain;border-radius:8px;display:inline-block;margin:.4rem 0}
article .blk{display:flex;flex-wrap:wrap;gap:1rem}article .cell{flex:1 1 260px;min-width:0}
article blockquote{margin:1.2rem 0;padding:.4rem 1.2rem;border-left:4px solid var(--accent);color:var(--muted)}
article table{border-collapse:collapse;width:100%}article td,article th{border:1px solid var(--line);padding:.4rem}
article ul.index{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.6rem}
article ul.index a{display:block;padding:.7rem .9rem;border:1px solid var(--line);border-radius:10px;text-decoration:none}
article ul.index a:hover{border-color:var(--accent)}
article pre{overflow:auto;background:var(--bg);padding:1rem;border-radius:8px}
.foot{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
.foot .wrap{padding:1.5rem 16px;display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;justify-content:space-between}
.foot a{color:var(--muted)}