:root{
  --bg:#ffffff;
  --bg-alt:#f6f8fc;
  --ink:#0f172a;
  --ink-soft:#475569;
  --muted:#64748b;
  --line:#e2e8f0;
  --brand:#2563eb;
  --brand-2:#06b6d4;
  --brand-ink:#1d4ed8;
  --code-bg:#0f172a;
  --code-ink:#e2e8f0;
  --radius:14px;
  --maxw:1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand-ink);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
code{font-family:var(--mono);font-size:.9em}
.muted{color:var(--muted)}
.small{font-size:.875rem}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:700;letter-spacing:-.02em;color:var(--ink);font-size:1.02rem}
.brand:hover{text-decoration:none}
.brand-mark{color:var(--brand)}
.brand-rest{color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--ink-soft);font-size:.94rem;font-weight:500}
.nav-links a:hover{color:var(--brand-ink);text-decoration:none}
.nav-gh{padding:7px 14px;border:1px solid var(--line);border-radius:9px;color:var(--ink)!important}
.nav-gh:hover{border-color:var(--brand);background:var(--bg-alt)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:84px 0 72px;
  background:
    radial-gradient(900px 420px at 78% -8%, rgba(37,99,235,.12), transparent 60%),
    radial-gradient(700px 360px at 6% 8%, rgba(6,182,212,.10), transparent 55%);
}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(2.1rem,4.4vw,3.4rem);
  line-height:1.08;letter-spacing:-.03em;margin:0 0 18px;font-weight:800;
}
.grad{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{font-size:1.16rem;color:var(--ink-soft);margin:0 0 28px;max-width:46ch}
.hero-stats{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;min-width:140px;flex:1;
  box-shadow:0 1px 2px rgba(15,23,42,.04);
}
.stat .num{display:block;font-weight:800;font-size:1.12rem;color:var(--ink);letter-spacing:-.01em}
.stat .lbl{display:block;font-size:.78rem;color:var(--muted);margin-top:2px}
.hero-cta{display:flex;gap:14px;margin-bottom:22px;flex-wrap:wrap}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap}
.hero-badges img{height:20px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:600;font-size:.96rem;padding:11px 20px;border-radius:11px;
  border:1px solid transparent;cursor:pointer;transition:transform .06s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));color:#fff;
  box-shadow:0 6px 18px rgba(37,99,235,.32);
}
.btn-primary:hover{box-shadow:0 10px 26px rgba(37,99,235,.4)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-ink)}
.btn-lg{padding:14px 28px;font-size:1.05rem}

/* ---------- Code cards ---------- */
.code-card{
  background:var(--code-bg);border-radius:var(--radius);overflow:hidden;
  box-shadow:0 24px 60px -20px rgba(15,23,42,.5), 0 0 0 1px rgba(15,23,42,.06);
}
.code-head{
  display:flex;align-items:center;gap:8px;
  padding:12px 16px;background:#1e293b;border-bottom:1px solid #0b1220;
}
.code-head .dot{width:11px;height:11px;border-radius:50%;background:#475569}
.code-head .dot:nth-child(1){background:#ef4444}
.code-head .dot:nth-child(2){background:#f59e0b}
.code-head .dot:nth-child(3){background:#22c55e}
.code-file{margin-left:8px;color:#94a3b8;font-family:var(--mono);font-size:.82rem}
pre.code{margin:0;padding:20px 22px;overflow-x:auto}
pre.code code{
  font-family:var(--mono);font-size:.86rem;line-height:1.7;color:var(--code-ink);white-space:pre;
}
/* token colors */
.code .c1{color:#7c8aa5;font-style:italic}
.code .s{color:#86efac}
.code .t{color:#7dd3fc}
.code .k{color:#c4b5fd}
.code .fn{color:#fcd34d}
.code .pp{color:#f0abfc}
.code .pr{color:#22c55e}

/* ---------- Sections ---------- */
.section{padding:76px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{font-size:clamp(1.6rem,2.6vw,2.1rem);letter-spacing:-.02em;margin:0 0 10px;font-weight:800}
.section-sub{color:var(--ink-soft);margin:0 0 36px;font-size:1.05rem}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  transition:transform .12s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 36px -18px rgba(15,23,42,.28);border-color:#cbd5e1}
.card .ic{
  width:44px;height:44px;border-radius:11px;display:grid;place-items:center;font-size:1.3rem;
  background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(6,182,212,.12));margin-bottom:14px;
}
.card h3{margin:0 0 6px;font-size:1.12rem}
.card p{margin:0;color:var(--ink-soft);font-size:.96rem}

/* ---------- Quick start ---------- */
.quickstart{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.quickstart-copy p{color:var(--ink-soft)}
.terminal{
  background:var(--code-bg);border-radius:12px;padding:16px 18px;margin:18px 0;
  box-shadow:0 14px 36px -20px rgba(15,23,42,.5);
}
.terminal pre{margin:0;overflow-x:auto}
.terminal code{font-family:var(--mono);font-size:.85rem;color:var(--code-ink);line-height:1.8}
.quickstart-copy code{background:rgba(37,99,235,.08);padding:1px 6px;border-radius:6px;color:var(--brand-ink)}

/* ---------- Features ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature{padding:20px;border:1px solid var(--line);border-radius:12px;background:#fff}
.feature h4{margin:0 0 6px;font-size:1rem}
.feature p{margin:0;color:var(--ink-soft);font-size:.9rem}
.feature code{background:rgba(37,99,235,.08);padding:1px 5px;border-radius:5px;color:var(--brand-ink);font-size:.85em}

/* ---------- Publications ---------- */
.pubs{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.pubs li{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;
  border-left:3px solid var(--brand);
}
.pubs li a{font-weight:600;font-size:1.04rem}
.pub-venue{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}

/* ---------- Related ---------- */
.related{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.rel{
  display:block;padding:20px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);
  transition:transform .12s ease, box-shadow .2s ease, border-color .2s ease;
}
.rel:hover{transform:translateY(-3px);box-shadow:0 16px 36px -18px rgba(15,23,42,.28);border-color:var(--brand);text-decoration:none}
.rel strong{display:block;color:var(--brand-ink);margin-bottom:4px}
.rel span{color:var(--ink-soft);font-size:.9rem}

/* ---------- CTA ---------- */
.cta{
  padding:80px 0;text-align:center;
  background:linear-gradient(120deg,#0f172a,#1e293b);
}
.cta-inner h2{color:#fff;font-size:clamp(1.7rem,3vw,2.3rem);margin:0 0 12px;letter-spacing:-.02em}
.cta-inner p{color:#cbd5e1;margin:0 0 28px;font-size:1.08rem}

/* ---------- Footer ---------- */
.footer{background:#0b1220;color:#cbd5e1;padding:54px 0 28px}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1.4fr;gap:36px}
.footer .brand-rest{color:#e2e8f0}
.footer-col h5{color:#fff;margin:0 0 12px;font-size:.95rem;text-transform:uppercase;letter-spacing:.06em}
.footer-col a{display:block;color:#94a3b8;margin-bottom:8px}
.footer-col a:hover{color:#fff}
.footer .muted{color:#7d8aa3}
.footer-bottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:22px;text-align:center}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .quickstart{grid-template-columns:1fr;gap:28px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .related{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:28px}
}
@media (max-width:600px){
  .nav-links{gap:14px}
  .nav-links a:not(.nav-gh){display:none}
  .cards,.feature-grid,.related{grid-template-columns:1fr}
  .hero{padding:56px 0 48px}
}