:root{--bg:#0b0d12;--muted:#9aa3b2;--text:#e9eef7;--line:hsla(0,0%,100%,.08);--btn:#2a64ff;--btn2:#1a1f2e}*{box-sizing:border-box}body,html{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:radial-gradient(1200px 700px at 20% 0,rgba(42,100,255,.2),transparent 55%),radial-gradient(900px 600px at 80% 10%,rgba(0,255,198,.12),transparent 50%),var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.container{max-width:980px;margin:0 auto;padding:24px}.header{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}.brand{font-weight:800;letter-spacing:.4px}.nav a{color:var(--muted);margin-left:14px}.nav a:hover{color:var(--text)}.hero{padding:42px 0 14px}.h1{font-size:clamp(30px,4vw,46px);line-height:1.05;margin:0 0 10px}.sub{color:var(--muted);font-size:16px;max-width:640px}.row{display:grid;grid-template-columns:1.25fr .75fr;grid-gap:18px;gap:18px;margin-top:22px}@media (max-width:860px){.row{grid-template-columns:1fr}}.card{background:linear-gradient(180deg,hsla(0,0%,100%,.06),hsla(0,0%,100%,.03));border:1px solid var(--line);border-radius:18px;padding:18px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:10px;gap:10px}@media (max-width:700px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.badge{border:1px solid var(--line);padding:10px 12px;color:var(--muted);background:rgba(0,0,0,.18)}.badge,.btn{border-radius:14px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border:1px solid hsla(0,0%,100%,.12);background:var(--btn);color:#fff;font-weight:700;cursor:pointer}.btn.secondary{background:var(--btn2);color:var(--text)}.btn:disabled{opacity:.55;cursor:not-allowed}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.quizWrap{max-width:720px;margin:24px auto}.progress{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 18px}.dot{width:10px;height:10px;border-radius:999px;background:hsla(0,0%,100%,.12)}.dot.on{background:rgba(42,100,255,.95)}.qTitle{font-size:22px;margin:0 0 12px}.opt{width:100%;text-align:left;padding:14px;border-radius:14px;border:1px solid var(--line);background:rgba(0,0,0,.16);color:var(--text);cursor:pointer;margin-bottom:10px}.opt:hover{border-color:rgba(42,100,255,.55)}.opt small{display:block;color:var(--muted);margin-top:4px}.footer{padding:28px 0 10px;color:var(--muted);border-top:1px solid var(--line);margin-top:26px}hr{border:none;border-top:1px solid var(--line);margin:14px 0}.pill{display:inline-flex;gap:8px;align-items:center;padding:8px 10px;border-radius:999px;border:1px solid var(--line);background:rgba(0,0,0,.18);color:var(--muted);margin-right:8px;margin-top:8px}.h2{font-size:18px;margin:0 0 8px}.big{font-size:28px;margin:6px 0}.muted{color:var(--muted)}