:root{--primary:#0f766e;--dark:#0f172a;--muted:#64748b;--bg:#f8fafc;--card:#ffffff;--border:#e2e8f0;--danger:#b91c1c}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--dark)}a{color:var(--primary);text-decoration:none}.container{max-width:1180px;margin:0 auto;padding:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:0 10px 25px rgba(15,23,42,.04)}.btn{display:inline-flex;border:0;border-radius:10px;padding:10px 16px;background:var(--primary);color:#fff;font-weight:700;cursor:pointer}.input{width:100%;border:1px solid var(--border);border-radius:10px;padding:11px 12px;margin:8px 0 16px}.alert{padding:12px 16px;border-radius:10px;background:#fee2e2;color:var(--danger);margin:10px 0}.grid{display:grid;gap:16px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:800px){.grid-3{grid-template-columns:1fr}}