:root{
  --bg:#f6f8fb; --fg:#0f1b2d; --muted:#4a5a72; --card:#ffffff; --line:#dbe3ee;
  --brand:#0b1f3a; --accent:#1f6feb; --accent-fg:#ffffff;
  --hero-a:#0b1f3a; --hero-b:#16406f; --hero-fg:#f3f7ff;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0a1320; --fg:#e8eef8; --muted:#9db0ca; --card:#111e31; --line:#223552;
         --brand:#e8eef8; --accent:#5b9dff; --accent-fg:#06101f; --hero-a:#0b1f3a; --hero-b:#10335a; }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--accent)}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 12px;border-radius:8px}
.skip:focus{left:8px;z-index:10}

.top{background:var(--hero-a);color:var(--hero-fg)}
.bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:4px 16px;min-height:60px;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:10px;color:var(--hero-fg);text-decoration:none;font-weight:650}
.brand svg{color:var(--hero-fg);flex:none}
.brand span{white-space:nowrap}
.top nav{display:flex;gap:18px;flex-wrap:wrap}
.top nav a{color:var(--hero-fg);text-decoration:none;opacity:.88;font-size:.95rem}
.top nav a:hover{opacity:1;text-decoration:underline}

.hero{background:linear-gradient(135deg,var(--hero-a),var(--hero-b));color:var(--hero-fg);padding:56px 0 72px}
.eyebrow{margin:0 0 8px;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;opacity:.8}
h1{margin:0 0 16px;font-size:clamp(1.9rem,5vw,3rem);line-height:1.15;letter-spacing:-.02em}
.lead{max-width:60ch;margin:0;font-size:1.1rem;opacity:.95}
.hero a{color:#bcd7ff}

.labs{display:grid;gap:20px;margin-top:-40px;grid-template-columns:1fr}
@media (min-width:760px){.labs{grid-template-columns:1fr 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;
  box-shadow:0 8px 24px rgba(8,20,40,.08);display:flex;flex-direction:column}
.card h3{margin:0 0 8px;font-size:1.35rem}
.card p{margin:0 0 12px;color:var(--muted)}
.card ul{margin:0 0 20px;padding-left:20px;color:var(--fg)}
.card li{margin:4px 0}
.btn{display:inline-block;align-self:flex-start;background:var(--accent);color:var(--accent-fg);
  padding:11px 20px;border-radius:10px;text-decoration:none;font-weight:650}
.btn:hover{filter:brightness(1.08)}
.btn:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.note{margin:10px 0 0;font-size:.85rem}
.card .btn{margin-top:auto}

.about{padding:56px 16px 40px;max-width:760px}
.about h2{margin:0 0 12px;font-size:1.5rem}
.about p{color:var(--muted)}

.foot{border-top:1px solid var(--line);padding:24px 0 36px;color:var(--muted);font-size:.9rem}
.foot p{margin:4px 0}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}