:root{--bg:#111827;--bg2:#1f2937;--card:rgba(31,41,55,0.75);--text:#f9fafb;--muted:#9ca3af;--accent:#38bdf8;--primary:#6366f1;--primary-2:#a855f7;--ok:#10b981;--bad:#f43f5e;--border:rgba(255,255,255,0.08)}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Inter,Segoe UI,Roboto,Arial,Helvetica,sans-serif;background:radial-gradient(circle at 10% 0,#172554 0,transparent 35%),radial-gradient(circle at 90% 20%,#312e81 0,transparent 30%),linear-gradient(180deg,var(--bg2) 0,var(--bg) 100%);color:var(--text)}a{color:inherit;text-decoration:none}.container{max-width:980px;margin:0 auto;padding:30px}@media (max-width:450px){.container{padding:15px 0}}.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:22px}.brand{font-weight:800;font-size:1.3rem;letter-spacing:.3px}.nav{display:flex;gap:10px;flex-wrap:wrap}.nav a{border:1px solid var(--border);border-radius:999px;padding:8px 14px;background:rgba(255,255,255,.02);transition:.2s ease}.nav a:hover{border-color:#7c8af7;transform:translateY(-1px)}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 20px 45px rgba(0,0,0,.35);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);width:100%;margin-top:15px}.card h3{font-size:clamp(.8rem,3vw,1.3rem)}.home{display:grid;grid-gap:18px;gap:18px}.eyebrow{color:#93c5fd;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;font-size:.78rem}.heroTitle{margin:6px 0 8px;font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.2}.heroText{color:var(--muted);max-width:700px}.ctaRow{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.topics{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:12px;gap:12px}.topicCard{display:block;border-radius:16px;border:1px solid var(--border);background:rgba(255,255,255,.02);padding:16px;transition:.2s ease}.topicCard p{color:var(--muted)}.topicCard:hover{border-color:#7c8af7;transform:translateY(-2px)}.hint{color:#93c5fd;font-weight:600}.btn{border:1px solid var(--border);background:rgba(255,255,255,.03);color:var(--text);border-radius:12px;padding:10px 14px;cursor:pointer;transition:.2s ease}.btn:hover:not(:disabled){transform:translateY(-1px);border-color:#7c8af7}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{border:none;background:linear-gradient(130deg,var(--primary),var(--primary-2))}.options-grid{display:flex;justify-content:flex-start;align-items:center;column-gap:20px}.options-grid>a{padding:10px 30px;font-size:18px;cursor:pointer}@media (max-width:600px){.options-grid{flex-direction:column;gap:10px}.options-grid>.category{width:90%;text-align:center}.topbar{flex-direction:column;align-items:center}}