:root{
  --bg:#F6F7F9;
  --surface:rgba(255,255,255,.78);
  --surfaceSolid:#ffffff;
  --text:#0B0F19;
  --muted:#5B6472;
  --line:rgba(15,23,42,.12);
  --brand:#0B5FFF;
  --brand2:#6AE4FF;
  --shadow: 0 18px 60px rgba(15,23,42,.12);
  --shadow2: 0 10px 30px rgba(15,23,42,.10);
  --radius: 22px;
  --radius2: 16px;
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background:
    radial-gradient(900px 620px at 12% 0%, rgba(11,95,255,.14), transparent 60%),
    radial-gradient(820px 540px at 88% 8%, rgba(106,228,255,.18), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, #ffffff 55%, var(--bg) 100%);
  overflow-x:hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline; text-underline-offset:3px; text-decoration-thickness:2px}
.wrap{max-width:var(--max); margin:0 auto; padding:0 20px}

/* Nav */
.nav{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(180%) blur(16px);
  background: rgba(17,24,39,.92);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:130px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:900;
  letter-spacing:.2px;
  color:var(--text);
}
.brand:hover{text-decoration:none}
.brand-sub{font-weight:900; font-size:12px; color:var(--muted)}
.logo{
  width:130px;
  height:130px;
  display:block;
  object-fit:contain;
  flex-shrink:0;
}
.nav-links{display:flex; gap:18px; align-items:center}
.hamburger{display:none}
.nav-links a{
  color:var(--muted);
  font-weight:800;
  font-size:14px;
  padding:10px 10px;
  border-radius:12px;
  transition:.2s ease;
  text-decoration:none;
}
.nav-links a:hover{color:var(--text); background:rgba(15,23,42,.06); text-decoration:none}

/* Dark header override (logo is light) */
.nav .brand{color:rgba(255,255,255,.92)}
.nav .brand-sub{color:rgba(255,255,255,.64)}
.nav .nav-links a{color:rgba(255,255,255,.74)}
.nav .nav-links a:hover{color:#fff; background:rgba(255,255,255,.10); text-decoration:none}
.nav .btn{
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.18);
  color:#fff;
  box-shadow:none;
}
.nav .btn:hover{background: rgba(255,255,255,.14)}
.nav .btn.primary{
  background: #fff;
  color: var(--text);
  border-color: rgba(255,255,255,.22);
}
.nav .btn.primary:hover{background: #f3f4f6}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  font-weight:900;
  border:1px solid var(--line);
  background: var(--surfaceSolid);
  color:var(--text);
  box-shadow: 0 1px 2px rgba(15,23,42,.06);
  transition:.2s ease;
  cursor:pointer;
  text-decoration:none;
}
.btn:hover{transform: translateY(-1px); background: rgba(15,23,42,.03); text-decoration:none}
.btn:focus-visible{
  outline:none;
  box-shadow: 0 0 0 4px rgba(11,95,255,.18), 0 1px 2px rgba(15,23,42,.06);
}
.btn.primary{
  border-color: rgba(15,23,42,.10);
  background: var(--text);
  color:#fff;
  box-shadow: var(--shadow2);
}
.btn.primary:hover{background: #111827}

/* Content */
main{padding:72px 0 64px}
h1{
  margin:0 0 12px;
  font-size:44px;
  line-height:1.08;
  letter-spacing:-.6px;
}
.lede{
  margin:0 0 18px;
  color:var(--muted);
  font-size:15px;
  line-height:1.7;
  max-width:80ch;
}
.meta{
  display:flex; gap:10px; flex-wrap:wrap;
  margin:0 0 18px;
  color:var(--muted);
  font-weight:900;
  font-size:13px;
}
.meta span{
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background: rgba(15,23,42,.035);
  border:1px solid var(--line);
}
.panel{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background: var(--surfaceSolid);
  padding:20px;
  box-shadow: 0 1px 2px rgba(15,23,42,.06);
}
.panel h2{
  margin:22px 0 10px;
  font-size:18px;
  letter-spacing:-.2px;
}
.panel h2:first-child{margin-top:0}
.panel h3{
  margin:18px 0 10px;
  font-size:15px;
}
.panel p{
  margin:0 0 12px;
  color:var(--muted);
  line-height:1.8;
  font-size:14px;
}
.panel ul, .panel ol{
  margin:0 0 12px;
  padding-left:18px;
  color:var(--muted);
  line-height:1.8;
  font-size:14px;
}
.panel li{margin:6px 0}
.panel code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
}
.callout{
  border-radius:var(--radius2);
  border:1px solid var(--line);
  background: rgba(15,23,42,.035);
  padding:14px;
}

footer{
  padding:22px 0 40px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:13px;
}
.foot{
  display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap;
}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--text)}

@media (max-width: 900px){
  h1{font-size:36px}
  .nav-links{display:none}
  .nav-inner{height:130px}
  .logo{width:130px; height:130px}
  .hamburger{display:inline-flex}
}