:root{--bg:#0a0c16;--ink:#e7ecfb;--muted:#93a0c6;--line:rgba(120,150,240,.14);--card:rgba(15,19,34,.62);--c1:#6366f1;--c2:#22d3ee;--c3:#38bdf8;--grad:linear-gradient(110deg,#6366f1,#38bdf8 55%,#22d3ee);--mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;--radius:20px;--shadow:0 30px 80px -30px rgba(0,0,0,.85)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.5}.bg-wrap{position:fixed;inset:0;z-index:-3;background:radial-gradient(1200px 800px at 84% -12%,#141a34 0,transparent 60%),radial-gradient(1000px 700px at 2% 108%,#101a30 0,transparent 55%),var(--bg)}.blob{position:fixed;border-radius:50%;filter:blur(88px);opacity:.24;z-index:-2;animation:float 30s ease-in-out infinite;will-change:transform}.b1{width:44vw;height:44vw;left:-12vw;top:-14vw;background:radial-gradient(circle at 30% 30%,#6366f1,transparent 66%)}.b2{width:42vw;height:42vw;right:-14vw;top:6vh;background:radial-gradient(circle at 60% 40%,#22d3ee,transparent 64%);animation-delay:-11s}.b3{width:40vw;height:40vw;left:28vw;bottom:-22vw;background:radial-gradient(circle at 50% 50%,#38bdf8,transparent 62%);animation-delay:-19s}@keyframes float{0%,to{transform:translate(0) scale(1)}33%{transform:translate(4vw,3vh) scale(1.07)}66%{transform:translate(-3vw,-2vh) scale(.95)}}.grid-overlay{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:54px 54px;-webkit-mask-image:radial-gradient(1100px 700px at 50% -5%,#000 0,transparent 78%);mask-image:radial-gradient(1100px 700px at 50% -5%,#000 0,transparent 78%);opacity:.5}@media (prefers-reduced-motion:reduce){.blob{animation:none}}.shell{max-width:720px;margin:0 auto;padding:30px 22px 60px}.brand-row{display:flex;align-items:center;gap:11px;margin-bottom:26px}.logo-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--grad);box-shadow:0 8px 26px -8px rgba(99,102,241,.55)}.wordmark{font-weight:800;font-size:20px;letter-spacing:-.02em}.wordmark b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero{text-align:center;margin:6px auto 22px;max-width:620px}.hero h1{font-size:clamp(30px,5.4vw,50px);line-height:1.05;letter-spacing:-.035em;font-weight:850;margin:0 0 12px}.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{color:var(--muted);font-size:clamp(15px,2.2vw,17px);margin:0 auto;max-width:520px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow)}.expr{width:100%;background:rgba(10,12,22,.8);border:1px solid var(--line);color:var(--ink);border-radius:13px;padding:16px;font-family:var(--mono);font-size:clamp(18px,5vw,24px);text-align:center;letter-spacing:.06em;outline:none}.expr:focus{border-color:var(--c2);box-shadow:0 0 0 3px rgba(34,211,238,.16)}.expr.bad{border-color:#f87171}.fields{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:6px;gap:6px;margin-top:8px}.fl{font-size:10px;color:var(--muted);font-weight:600;letter-spacing:.02em}.desc,.fl{text-align:center}.desc{margin-top:18px;padding:18px;border-radius:14px;background:rgba(10,12,22,.5);border:1px solid var(--line)}.desc .txt{font-size:clamp(17px,3.6vw,22px);font-weight:750;line-height:1.35}.desc .txt.err{color:#fca5a5;font-weight:600;font-size:15px}.next{margin-top:18px}.next h3{font-size:12px;color:var(--muted);font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px}.runs{flex-direction:column;gap:7px}.run,.runs{display:flex}.run{align-items:center;gap:12px;background:rgba(10,12,22,.5);border:1px solid var(--line);border-radius:11px;padding:10px 14px;font-family:var(--mono);font-size:14px}.run .idx{color:var(--c2);font-weight:700}.run .when{color:var(--ink)}.examples{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap;justify-content:center}.chip{background:rgba(99,102,241,.12);color:var(--c3);border:1px solid rgba(99,102,241,.32);border-radius:9px;padding:8px 12px;font-size:12px;font-weight:600;cursor:pointer;font-family:var(--mono)}.chip:hover{background:rgba(99,102,241,.22)}.note{margin-top:16px;font-size:12px;text-align:center;line-height:1.6;border-top:1px solid var(--line);padding-top:14px}.footer,.note{color:var(--muted)}.footer{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;font-size:13px}.footer .sep{opacity:.4}