:root{--ink:#14202b;--muted:#5b6b78;--line:#e3e8ee;--bg:#fff;--soft:#f5f8fb;--brand:#0b6bcb;--brand-d:#0956a3;--accent:#0f9d77}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}a:hover{color:var(--brand-d)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:10}
.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;letter-spacing:-.01em}
.dot{width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px #d6f3ea}
.top nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:.95rem;white-space:nowrap}
.top nav a[aria-current=page],.top nav a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px}
main{padding:28px 20px 48px}
h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.15;letter-spacing:-.02em;margin:.2em 0 .4em}
h2{font-size:1.45rem;margin:2em 0 .5em;letter-spacing:-.01em}
h3{font-size:1.05rem;margin:0 0 .4em}
.lead{font-size:1.15rem;color:var(--muted);max-width:760px}
.hero{padding:12px 0 8px}
.checked{display:inline-block;background:#fff8e1;border:1px solid #f3dc8f;border-radius:8px;padding:6px 12px;font-size:.9rem;margin:.6em 0}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:11px 18px;font-weight:600;text-decoration:none;font-size:1rem;cursor:pointer}
.btn:hover{background:var(--brand-d);color:#fff}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:22px 0}
.fact{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:.95rem}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table.cmp{border-collapse:collapse;width:100%;font-size:.92rem}
.cmp th,.cmp td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.cmp thead th{background:var(--soft);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
.cmp tbody tr:last-child>*{border-bottom:0}
.cmp tbody th{white-space:nowrap}
.cmp.narrow{width:100%}
.num{font-weight:700;white-space:nowrap}
.tag{display:inline-block;margin-left:6px;font-size:.72rem;background:#eef3f8;color:var(--muted);border-radius:4px;padding:1px 6px;font-weight:500}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{border:1px solid var(--line);border-radius:10px;padding:16px}
.card p{margin:0;font-size:.95rem}
.muted{color:var(--muted)}.small{font-size:.85rem}
.prose{max-width:780px}
.crumbs{font-size:.88rem;color:var(--muted)}
.specs{display:grid;grid-template-columns:200px 1fr;gap:8px 16px;border:1px solid var(--line);border-radius:10px;padding:16px;background:var(--soft)}
.specs dt{font-weight:600}.specs dd{margin:0}
.sources{font-size:.92rem}
.vlist{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:10px}
.vlist li{border:1px solid var(--line);border-radius:8px;padding:10px 14px;display:flex;flex-direction:column}
.vlist span{color:var(--muted);font-size:.88rem}
.calc{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:18px;max-width:640px}
.calc label{font-weight:600;display:block;margin-bottom:6px}
.calc-row{display:flex;gap:10px}
.calc input{flex:1;font-size:1.1rem;padding:10px 12px;border:1px solid #c9d3dd;border-radius:8px;min-width:0}
.presets{font-size:.88rem;margin:10px 0 0}.presets a{margin-right:8px}
.foot{border-top:1px solid var(--line);background:var(--soft);font-size:.9rem;color:var(--muted);padding:20px 0}
code{background:var(--soft);padding:1px 5px;border-radius:4px}
@media (max-width:720px){
  .top nav{width:100%;overflow-x:auto;white-space:nowrap;padding-bottom:8px}
  .top nav a{margin:0 14px 0 0}
  .specs{grid-template-columns:1fr}
  .specs dt{margin-top:6px}
  .table-wrap{border:0;overflow:visible}
  table.cmp thead{display:none}
  table.cmp,table.cmp tbody,table.cmp tr,table.cmp th,table.cmp td{display:block;width:100%}
  table.cmp tr{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;padding:6px 0}
  .cmp th,.cmp td{border:0;padding:6px 14px}
  .cmp tbody th{white-space:normal;font-size:1.05rem}
  .cmp td[data-label]::before{content:attr(data-label);display:block;font-size:.75rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
  .cmp.narrow td{display:inline-block;width:auto}
}