:root{--ink:#1d2433;--muted:#5b6475;--accent:#0b5cad;--warn:#b54708;--bg:#f6f8fb}
*{box-sizing:border-box}body{margin:0;font:17px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg)}
header,footer{background:#fff;border-bottom:1px solid #e3e7ee;padding:14px 20px}footer{border-top:1px solid #e3e7ee;margin-top:40px;font-size:14px;color:var(--muted)}
main{max-width:820px;margin:0 auto;padding:20px}article{background:#fff;border:1px solid #e3e7ee;border-radius:10px;padding:28px 32px}
nav.crumbs{font-size:14px;color:var(--muted)}nav.crumbs a{color:var(--accent);text-decoration:none}
h1{font-size:32px;line-height:1.2;margin:.3em 0}h2{font-size:23px;margin-top:1.8em;border-top:1px solid #eef1f5;padding-top:1em}
.answer{background:#eef5ff;border-left:4px solid var(--accent);padding:14px 18px;border-radius:6px}
.warn{background:#fff6ed;border-left:4px solid var(--warn);padding:12px 16px;border-radius:6px}
.note{font-size:13px;color:var(--warn);font-weight:600}
table{border-collapse:collapse;width:100%}td,th{border:1px solid #e3e7ee;padding:8px 10px;text-align:left;vertical-align:top}th{background:#f2f5f9}
.ph{border:2px dashed #c3cad6;border-radius:8px;padding:14px;margin:10px 0;background:#fbfcfe}
.ph b{color:var(--muted);font-size:12px;letter-spacing:.05em;text-transform:uppercase}
ol li{margin-bottom:.6em}a{color:var(--accent)}form input,form select{width:100%;padding:8px;margin:4px 0 10px;border:1px solid #c3cad6;border-radius:6px}
button{background:var(--accent);color:#fff;border:0;padding:10px 18px;border-radius:6px;font-size:16px}
.related a{display:inline-block;margin:4px 6px 4px 0;padding:6px 12px;border:1px solid #cfd8e6;border-radius:20px;text-decoration:none}
.toc{font-size:15px}.src{font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;padding:0;list-style:none}.grid li a{display:block;padding:12px;border:1px solid #cfd8e6;border-radius:8px;text-decoration:none;background:#fff}
.muted{color:var(--muted)}header img{vertical-align:middle;margin-right:8px}.codes td:first-child{white-space:nowrap;font-weight:600}