.upgrade-panel{background:#fff;border:1px solid #dbe3ee;border-radius:18px;padding:20px;margin:16px 0;color:#24324b;font-size:13px}.upgrade-panel h2{font-size:18px;font-weight:800;margin-bottom:8px}.upgrade-panel p{margin:8px 0}.upgrade-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:12px 0}.upgrade-button{background:#4338ca;color:#fff;border-radius:9px;padding:9px 14px;font-weight:700;cursor:pointer}.upgrade-button.secondary{background:#eef2ff;color:#3730a3}.upgrade-button:disabled{opacity:.45;cursor:wait}.upgrade-panel input[type=file]{max-width:100%}.upgrade-status{white-space:pre-wrap;overflow-wrap:anywhere;padding:12px;border-radius:10px;background:#f1f5f9;max-height:300px;overflow:auto}.upgrade-error{color:#991b1b;background:#fef2f2}.upgrade-success{color:#065f46;background:#ecfdf5}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.preview-language{border:1px solid #dbe3ee;padding:16px;border-radius:12px;min-width:0}.question-copy{line-height:1.8;overflow-wrap:anywhere;margin:12px 0}.question-copy table{border-collapse:collapse;width:100%;display:block;overflow:auto}.question-copy td,.question-copy th{border:1px solid #cbd5e1;padding:5px}.question-diagram{max-height:420px;max-width:100%;height:auto;object-fit:contain;margin:14px auto;background:white}.question-part{border-top:1px solid #dbe3ee;margin-top:14px;padding-top:12px}.preview-options{list-style-type:upper-alpha;margin-left:22px}.preview-options li{padding:5px}.practice-choice{display:flex;align-items:flex-start;gap:12px;padding:12px;border:1px solid #dbe3ee;border-radius:12px;margin:8px 0;cursor:pointer}.practice-choice:has(input:checked){border-color:#6366f1;background:#eef2ff}.practice-answer{background:#ecfdf5;border:1px solid #a7f3d0;padding:16px;border-radius:12px;margin-top:14px}.practice-text{width:100%;min-height:100px;padding:12px;border:1px solid #cbd5e1;border-radius:12px}.practice-meta{font-size:11px;color:#596579;margin-bottom:10px}.practice-feedback{font-weight:800;margin:12px 0}.coverage-table{width:100%;border-collapse:collapse}.coverage-table td,.coverage-table th{padding:8px;border-bottom:1px solid #e2e8f0;text-align:left}.upgrade-panel select{padding:8px;border:1px solid #cbd5e1;border-radius:8px;max-width:100%}@media(max-width:700px){.preview-grid{grid-template-columns:1fr}.upgrade-panel{padding:14px}}