:root{--ink:#171D21;--ink-soft:#2A3339;--muted:#4A555B;--rule:rgba(23,29,33,0.18);--paper:#FFFFFF;--desk:#F6F7F7;--redline:#D42F2A;--blueline:#2457C5}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--desk);color:var(--ink);font:16px/1.6 "Inter Tight",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--blueline);text-underline-offset:2px}
.top{position:sticky;top:0;z-index:1;display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--paper);border-bottom:1px solid var(--rule)}
.brand{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:700;text-decoration:none}
.top nav{display:flex;gap:14px;flex:1;font-size:14px}
.top nav a{color:var(--ink-soft);text-decoration:none}
.top nav a:hover{color:var(--ink);text-decoration:underline}
.open{padding:6px 12px;border-radius:5px;background:var(--ink);color:var(--paper);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap}
.sheet{max-width:820px;margin:24px auto;padding:28px 32px 36px;background:var(--paper);border-radius:10px;box-shadow:0 0 0 1px rgba(15,23,30,0.04),0 2px 4px rgba(15,23,30,0.06),0 14px 34px rgba(15,23,30,0.10)}
.crumbs{margin:0 0 8px;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--muted)}
h1{margin:0 0 12px;font-size:32px;line-height:1.2;letter-spacing:-0.01em}
h2{margin:32px 0 8px;padding-top:12px;border-top:1px solid var(--rule);font-size:20px;line-height:1.3}
.lead{font-size:18px;color:var(--ink-soft)}
ul{padding-left:20px}
li{margin:4px 0}
dt{margin-top:14px;font-weight:600}
dd{margin:4px 0 0}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.cards li{margin:0}
.cards a{display:block;height:100%;padding:12px 14px;border:1px solid var(--rule);border-radius:8px;color:var(--ink);text-decoration:none}
.cards a:hover{border-color:var(--blueline)}
.cards strong{display:block;margin-bottom:4px}
.cards span{display:block;font-size:14px;color:var(--muted)}
.model h2{font-size:18px}
.meta{font-size:14px;color:var(--muted)}
.cta{margin-top:28px;padding:12px 14px;border-left:3px solid var(--redline);background:var(--desk)}
.foot{max-width:820px;margin:0 auto 32px;padding:0 16px;font-size:13px;color:var(--muted)}
.foot a{color:var(--muted)}
@media (max-width:640px){.top nav{display:none}.top{justify-content:space-between}.sheet{margin:12px;padding:20px 16px 28px}h1{font-size:26px}}