:root{
  --bg:#0b0b0f;
  --fg:#e7e7ea;
  --muted:#a5a6ad;
  --accent:#86b7ff;
  --accent2:#ff8d7a;
  --card:#121218;
  --border:#22222c;
}
*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--fg);
  background:var(--bg);
  line-height:1.6;
  overflow-x:hidden;
}
/* full-page interactive background */
#bg{
  position:fixed;
  inset:0;
  z-index:-1;
  background:radial-gradient(1200px 800px at 15% 25%, rgba(134,183,255,0.15), transparent 60%),
             radial-gradient(1000px 700px at 70% 65%, rgba(255,141,122,0.12), transparent 60%),
             var(--bg);
}
/* content container */
.container{
  max-width:1100px;
  margin:0 auto;
  padding:72px 24px;
}
h1,h2,h3{line-height:1.2;margin:0 0 12px 0}
h1{font-size:42px;letter-spacing:0.3px}
h2{font-size:28px;color:#f3f3f7;margin-top:48px}
.lead{font-size:18px;color:var(--muted);max-width:900px}

.hero{
  padding:120px 0 80px 0;
  position:relative;
}
.badge{
  display:inline-block;padding:6px 10px;border:1px solid var(--border);
  background:rgba(255,255,255,0.02);border-radius:999px;color:var(--muted);font-size:12px
}
.kicker{color:var(--accent);text-transform:uppercase;letter-spacing:1.2px;font-size:12px}
hr{border:0;border-top:1px solid var(--border);margin:36px 0}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid var(--border);
  border-radius:16px;
  padding:20px;
}
.grid{
  display:grid;gap:18px;
}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:900px){
  .grid.cols-2,.grid.cols-3{grid-template-columns:1fr}
  h1{font-size:36px}
}
.figure{
  border:1px solid var(--border);
  background:var(--card);
  border-radius:14px;
  padding:10px;
}
.figure img{width:100%;display:block;border-radius:10px;opacity:0.96}
.figure small{color:var(--muted)}
code.inline{background:#161622;border:1px solid #232335;border-radius:6px;padding:2px 6px}
pre{
  background:#0e0e16;border:1px solid #222234;border-radius:12px;padding:14px;overflow:auto;
}
.ascii{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size:13px; color:#c9c9d3;}
.footer{
  border-top:1px solid var(--border);
  padding:32px 0 80px;
  color:var(--muted);
  font-size:14px;
}
/* sticky header */
.topbar{
  position:sticky;top:0;background:rgba(11,11,15,0.55);backdrop-filter: blur(8px);
  border-bottom:1px solid rgba(255,255,255,0.05);z-index:5
}
.topbar .container{padding:10px 24px;display:flex;gap:16px;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:600}
.logo-dot{
  width:10px;height:10px;border-radius:50%;background:conic-gradient(from 0deg, #86b7ff, #ff8d7a);
  box-shadow:0 0 10px rgba(255,141,122,0.55), 0 0 12px rgba(134,183,255,0.6);
}
.nav{display:flex;gap:14px;font-size:14px}
.nav a{color:var(--muted);text-decoration:none}
.nav a:hover{color:#fff}
.cta{border:1px solid var(--border);padding:8px 12px;border-radius:10px;text-decoration:none;color:#fff}
/* note blocks */
.note{border-left:3px solid var(--accent);padding:10px 12px;background:rgba(134,183,255,0.07);border-radius:10px}
.warning{border-left-color:#ffb4a7;background:rgba(255,141,122,0.07)}
/* link styles */
a{color:#cfe1ff}
a:hover{text-decoration:none}
/* reduce motion preference */
@media (prefers-reduced-motion: reduce){
  canvas#net{display:none}
}