:root{
  --bg:#F7F8FA;--ink:#0B1F3A;--muted:#4A5B70;--line:#D5DCE6;--paper:#fff;
  --heat:#E11D48;--heat-ink:#fff;--mark:#FFE08A;--ok:#0F6B4C;
  --max:1120px;--display:Instrument Sans,system-ui,sans-serif;--mono:IBM Plex Mono,ui-monospace,monospace;
}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--display);line-height:1.55}
img{max-width:100%;display:block}a{color:inherit}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:9}
.wrap{width:min(var(--max),calc(100% - 2rem));margin-inline:auto}
header.site{position:sticky;top:0;z-index:8;background:rgba(247,248,250,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 0}
.brand{font-weight:700;letter-spacing:-.03em;font-size:1.05rem;text-decoration:none}
.brand small{display:block;font-family:var(--mono);font-size:.62rem;font-weight:500;color:var(--muted);letter-spacing:.12em;text-transform:uppercase}
nav.desk{display:flex;flex-wrap:wrap;gap:.15rem .9rem;font-size:.86rem}
nav.desk a{text-decoration:none;color:var(--muted)}nav.desk a[aria-current="page"]{color:var(--ink);font-weight:600}
.btn{display:inline-flex;align-items:center;gap:.4rem;background:var(--heat);color:var(--heat-ink);text-decoration:none;padding:.7rem 1.05rem;font-weight:600;border-radius:4px;border:0;font:inherit;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.hero{padding:4.5rem 0 3rem;display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center}
.kicker{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--heat);margin:0 0 .8rem}
h1{font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.05;letter-spacing:-.045em;margin:0 0 1rem;font-weight:700}
h1 em{font-style:normal;background:linear-gradient(#FFE08A,#FFE08A) bottom/100% 38% no-repeat}
.lede{font-size:1.12rem;color:var(--muted);max-width:38em}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:1.1rem;box-shadow:0 12px 40px rgba(11,31,58,.06)}
.panel h2{margin:0 0 .8rem;font-size:1rem}
.chk{display:flex;gap:.6rem;align-items:flex-start;padding:.45rem 0;border-bottom:1px dashed var(--line);font-size:.92rem}
.chk:last-child{border:0} .chk b{font-family:var(--mono);font-size:.75rem;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;padding:1.5rem 0 3rem;border-top:1px solid var(--line)}
.stats b{display:block;font-size:1.6rem;letter-spacing:-.04em}
.stats span{color:var(--muted);font-size:.85rem}
section.block{padding:3.4rem 0}
.sec-h{display:flex;justify-content:space-between;gap:1rem;align-items:end;margin-bottom:1.4rem}
.sec-h h2{margin:0;font-size:clamp(1.5rem,3vw,2.1rem);letter-spacing:-.03em}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.card{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:1.05rem 1.1rem;text-decoration:none;display:flex;flex-direction:column;gap:.45rem;min-height:10.5rem}
.card:hover{border-color:var(--ink)}
.sku{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--heat)}
.tags{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:auto}
.tag{font-family:var(--mono);font-size:.62rem;border:1px solid var(--line);padding:.15rem .4rem;border-radius:2px;color:var(--muted)}
table.spec{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--paper)}
table.spec th,table.spec td{border:1px solid var(--line);padding:.65rem .75rem;text-align:left}
table.spec th{background:#EEF1F6;font-weight:600}
.prose{max-width:42em}.prose p{color:var(--muted)}
.chapters{display:grid;gap:0;border-top:1px solid var(--line)}
.chapters a{display:grid;grid-template-columns:5rem 1fr auto;gap:1rem;padding:1.1rem 0;border-bottom:1px solid var(--line);text-decoration:none}
.num{font-family:var(--mono);color:var(--heat)}
footer.site{border-top:1px solid var(--line);padding:2.4rem 0 3rem;color:var(--muted);font-size:.9rem}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:1.5rem}
footer a{color:var(--ink)}
.menu{display:none;background:none;border:1px solid var(--line);padding:.4rem .6rem}
form.rfq{display:grid;gap:.7rem;max-width:36rem}
form.rfq input,form.rfq textarea,form.rfq select{width:100%;padding:.7rem .8rem;border:1px solid var(--line);border-radius:4px;font:inherit;background:#fff}
.notice{background:#fff6d8;border:1px solid #ead48a;padding:.8rem 1rem;border-radius:4px;font-size:.9rem}
@media (max-width:860px){
  .hero,.grid,.stats,.fgrid{grid-template-columns:1fr}
  nav.desk{display:none} nav.desk.open{display:flex;flex-direction:column;padding:0 0 1rem}
  .menu{display:block}
  .chapters a{grid-template-columns:3rem 1fr}
}