:root{--bg:#faf7f2;--card:#fff;--ink:#1c1917;--muted:#6b7280;--brand:#c45c00;--brand2:#9a3412;--line:#e7e0d5;--ok:#166534;--radius:16px;--shadow:0 8px 28px rgba(28,25,23,.06);--max:860px;--font:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial,sans-serif;--serif:Georgia,"Times New Roman",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:17px/1.55 var(--font);color:var(--ink);background:var(--bg)}
a{color:var(--brand2);text-decoration-thickness:1px;text-underline-offset:2px}a:hover{color:var(--brand)}
.skip{position:absolute;left:-9999px}.skip:focus{left:8px;top:8px;background:#000;color:#fff;padding:8px;z-index:9}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.hd{background:linear-gradient(135deg,#c45c00,#9a3412);color:#fff;box-shadow:var(--shadow)}
.hd-in{max-width:1100px;margin:0 auto;padding:14px 16px;display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.brand{display:flex;gap:12px;align-items:center;color:#fff;text-decoration:none}
.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.18);font:700 22px/1 var(--serif)}
.brand-name{display:block;font-weight:700;font-size:1.1rem}.brand-tag{display:block;font-size:.78rem;opacity:.9}
.go{display:flex;gap:8px;flex:1;min-width:220px;max-width:380px}
.go input{flex:1;border:0;border-radius:10px;padding:10px 12px;font:inherit}
.go button{border:0;border-radius:10px;padding:10px 14px;background:#1c1917;color:#fff;font:600 15px var(--font);cursor:pointer}
.letters{max-width:1100px;margin:0 auto;padding:8px 12px 12px;display:flex;flex-wrap:wrap;gap:4px;justify-content:center}
.letters a{display:inline-flex;min-width:28px;justify-content:center;padding:4px 6px;border-radius:8px;color:#fff;text-decoration:none;background:rgba(255,255,255,.12);font-weight:600;font-size:.92rem}
.letters a:hover,.letters a[aria-current="page"]{background:#fff;color:var(--brand2)}
main,.wrap{max-width:var(--max);margin:0 auto;padding:20px 16px 48px}
.crumbs{font-size:.9rem;color:var(--muted);margin:0 0 12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 20px 8px;box-shadow:var(--shadow)}
h1{font:700 clamp(1.45rem,2.5vw,2rem)/1.25 var(--serif);margin:0 0 12px;color:#111}
h2{font:700 1.25rem/1.3 var(--serif);margin:1.4em 0 .5em;color:#1c1917}
h3{font:700 1.05rem/1.35 var(--font);margin:1.1em 0 .4em}
.lead,.rule{font-size:1.12rem;background:#fff7ee;border-left:4px solid var(--brand);padding:12px 14px;border-radius:0 12px 12px 0;margin:12px 0 18px}
.rule b,.acc{color:var(--brand);font-weight:700}
.hero-svg{display:block;margin:8px auto 18px;max-width:100%;height:auto}
.toc{margin:12px 0 18px;border:1px solid var(--line);border-radius:12px;background:#fff}.toc summary{cursor:pointer;padding:10px 14px;font-weight:600}.toc ol{margin:0;padding:0 14px 12px 32px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;margin:12px 0 20px}
.grid a,.list a{display:block;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:#fff;text-decoration:none;color:var(--ink)}
.grid a:hover,.list a:hover{border-color:var(--brand);color:var(--brand2)}
.list{list-style:none;padding:0;margin:0 0 16px;display:grid;gap:6px}
.quiz{margin:16px 0;padding:14px;border:1px dashed #f59e0b;border-radius:12px;background:#fffbeb}
.muted{color:var(--muted);font-size:.95rem}
.ft{background:#1c1917;color:#e7e5e4;margin-top:40px;padding:28px 16px 18px}
.ft a{color:#fdba74}.ft-in{max-width:1100px;margin:0 auto;display:grid;gap:18px;grid-template-columns:2fr 1fr}
.ft-t{display:block;font-weight:700;margin-bottom:8px;color:#fff}.ft-l{display:grid;gap:6px}.ft-b{max-width:1100px;margin:18px auto 0;padding-top:12px;border-top:1px solid #44403c;font-size:.85rem;color:#a8a29e}
.alpha-block{margin:10px 0 18px}
@media (max-width:700px){.ft-in{grid-template-columns:1fr}.hd-in{flex-direction:column;align-items:stretch}.go{max-width:none}}
@media (min-width:900px){main,.wrap{padding-top:28px}}