:root{--ink:#14202b;--muted:#5b6b78;--line:#dfe6ec;--bg:#f7fafc;--brand:#0b6e8a;--brand2:#e8f4f8;--warn:#fff6e0;--warnline:#e9c46a}
*{box-sizing:border-box}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:#fff}
.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
a{color:var(--brand)}
header.site{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:10px;padding-bottom:10px}
.logo{font-weight:700;text-decoration:none;color:var(--ink);font-size:1.1rem}
nav a{margin-left:14px;text-decoration:none;font-size:.95rem}
nav a:first-child{margin-left:0}
main{padding-bottom:40px}
h1{font-size:1.7rem;line-height:1.25;margin:22px 0 8px}
h2{font-size:1.2rem;margin:28px 0 8px}
.lede{color:#33434f;font-size:1.05rem}
.small{font-size:.85rem;color:var(--muted)}
.muted{color:var(--muted)}
.crumbs{font-size:.85rem;margin-top:14px;color:var(--muted)}
.hero{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:18px 20px 14px;margin-top:20px}
.hero h1{margin-top:4px}
#q{width:100%;font-size:1.1rem;padding:14px 16px;border:2px solid var(--brand);border-radius:10px;outline:none}
#q:focus{box-shadow:0 0 0 4px var(--brand2)}
#results{margin-top:8px}
#results ul,#sizeresults ul{list-style:none;padding:0;margin:0;border:1px solid var(--line);border-radius:10px;background:#fff;overflow:hidden}
#results li a,#sizeresults li a{display:block;padding:10px 14px;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
#results li:first-child a,#sizeresults li:first-child a{border-top:0}
#results li a:hover,#results li a:focus,#sizeresults li a:hover{background:var(--brand2)}
.rname{font-weight:600}.rsub{display:block;font-size:.85rem;color:var(--muted)}
mark{background:#fff1a8;padding:0 1px}
.bysize{margin-top:12px}.bysize summary{cursor:pointer;color:var(--brand)}
#sizeform{display:flex;flex-wrap:wrap;gap:10px;align-items:end;margin:10px 0}
#sizeform input{padding:8px 10px;border:1px solid #b9c6d0;border-radius:8px;width:150px;font-size:1rem}
button,.btn{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:9px 16px;font-size:1rem;cursor:pointer;text-decoration:none;display:inline-block}
.btn.disabled{background:#cfd8df;color:#4b5a66;cursor:not-allowed}
.btns{display:flex;flex-wrap:wrap;gap:10px}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.cards a{display:block;border:1px solid var(--line);border-radius:10px;padding:12px;text-decoration:none;color:var(--ink)}
.cards a:hover{border-color:var(--brand)}
.cards span{display:block;color:var(--muted);font-size:.9rem}
.cols{columns:3 220px;padding-left:18px}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
thead th{background:var(--bg);font-weight:600}
table.spec tbody th{width:150px;background:#fcfdfe}
tr:last-child td,tr:last-child th{border-bottom:0}
.answer{background:var(--brand2);border-radius:12px;padding:6px 16px 10px;margin-top:16px}
.equiv{padding-left:18px}.equiv li{margin:6px 0}
.src{font-size:.82rem;color:var(--muted)}
.cite{font-size:.82rem;white-space:nowrap}
.note{font-size:.88rem;color:#33434f;margin-top:2px}
.caution{background:var(--warn);border:1px solid var(--warnline);border-radius:12px;padding:4px 16px 8px}
.warn-inline{display:block;font-size:.82rem;color:#8a5a00}
.buy{border:1px solid var(--line);border-radius:12px;padding:4px 16px 12px}
details{border-bottom:1px solid var(--line);padding:8px 0}
summary{cursor:pointer;font-weight:600}
.steps li{margin-bottom:10px}
code{background:var(--bg);padding:1px 5px;border-radius:4px}
footer.site{border-top:1px solid var(--line);background:var(--bg);font-size:.9rem;color:var(--muted);padding:14px 0}
.sr{position:absolute;left:-9999px}
@media (max-width:600px){h1{font-size:1.4rem}nav a{margin-left:10px;font-size:.88rem}table{font-size:.85rem}}
.brands{columns:2 300px;padding-left:18px}.brands li{break-inside:avoid}