:root{--primary:#7b1fa2;--bg:#f7f2f9;--card:#fff;--text:#1f2937;--muted:#6b7280;--border:#e5e7eb}body.dark{--bg:#0f0f14;--card:#16161d;--text:#f3f4f6;--muted:#9ca3af;--border:#2a2a33}*{box-sizing:border-box;font-family:Poppins,sans-serif;margin:0;padding:0}body{background:var(--bg);color:var(--text)}header{position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--border);padding:.9rem 1.2rem;display:flex;justify-content:space-between;align-items:center}.logo{font-weight:800;font-size:1.2rem;color:var(--primary)}.theme-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:transparent;cursor:pointer}main{max-width:900px;margin:auto;padding:1.2rem}.exam-head{background:var(--card);border-radius:18px;padding:1.4rem;border-left:6px solid var(--primary);margin-bottom:1.2rem}.exam-head h1{color:var(--primary);font-size:1.25rem}.short-instructions{margin:.6rem 0 .8rem;font-size:.85rem;color:var(--muted)}.short-instructions li{margin-left:1rem}.exam-meta{display:flex;gap:1rem;font-size:.85rem;align-items:center;flex-wrap:wrap}.timer{margin-left:auto;font-weight:800;color:#16a34a}.question{background:var(--card);border-radius:16px;padding:1.2rem;border:1px solid var(--border);margin-bottom:1.2rem}.q-no{font-weight:800;color:var(--primary)}.q-text{margin:.7rem 0;font-weight:600}.write-note{font-size:.8rem;color:var(--muted);background:rgba(123,31,162,.08);padding:.5rem .8rem;border-radius:10px}.section-btn{position:fixed;right:0;top:50%;transform:translateY(-50%);background:var(--primary);color:white;border:none;padding:10px 14px;border-radius:12px 0 0 12px;font-weight:700;z-index:20}.sidebar{position:fixed;right:-220px;top:50%;transform:translateY(-50%);width:200px;background:var(--primary);color:white;border-radius:12px 0 0 12px;padding:14px;transition:.3s;z-index:19}.sidebar.open{right:0}.sidebar button{width:100%;margin-bottom:8px;padding:10px;border-radius:10px;border:none;background:rgba(255,255,255,.15);color:white;font-weight:700}.submit-bar{position:sticky;bottom:0;background:var(--card);border-top:1px solid var(--border);padding:.8rem;display:flex;justify-content:space-between;align-items:center}.submit-btn{background:var(--primary);color:white;border:none;padding:.6rem 1.2rem;border-radius:12px;font-weight:700;cursor:pointer}footer{background:#0f0f14;color:#cbd5e1;padding:2rem 1rem;text-align:center;margin-top:2rem}footer a{color:#c084fc;text-decoration:none;margin:0 6px;font-size:.85rem}.submit-overlay{position:fixed;inset:0;background:rgba(0,0,0,.65);display:none;align-items:center;justify-content:center;z-index:100}.submit-popup{background:var(--card);width:min(92%,720px);border-radius:20px;padding:2rem;position:relative}.popup-options{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;margin-top:1.4rem}.popup-card{border-radius:16px;padding:1.4rem;border:1px solid var(--border)}.popup-card.paid{border:2px solid var(--primary);background:linear-gradient(180deg,#1a0b25,#120816);color:#f4f4f6}.popup-btn{width:100%;margin-top:1rem;padding:.7rem;border-radius:12px;font-weight:700;border:none;cursor:pointer}.popup-btn.primary{background:linear-gradient(135deg,#9333ea,#7c3aed);color:white}.popup-btn.secondary{background:transparent;border:1px solid var(--border);color:var(--text)}.close-popup{position:absolute;top:10px;right:14px;border:none;background:none;font-size:1.2rem;cursor:pointer}@media (max-width:600px){.popup-options{grid-template-columns:1fr}}