.quiz-container{max-width:680px;width:100%;margin:0 auto;padding:40px 40px 64px;flex:1;min-height:520px}@media(max-width:540px){.quiz-container{padding:24px 16px 48px}}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.quiz-progress{font-size:15px;font-weight:600;color:#666}.quiz-score{font-size:15px;font-weight:700;color:#00247d}.quiz-progress-bar{height:6px;background:#e0e0e0;border-radius:999px;margin-bottom:28px;overflow:hidden}.quiz-progress-fill{height:100%;background:#00247d;border-radius:999px;transition:width .3s ease}.quiz-question{font-size:clamp(18px,2.5vw,22px);font-weight:700;color:#1a1a1a;line-height:1.45;margin:0 0 28px;min-height:2.9em}.quiz-section-tag{display:inline-block;font-size:12px;font-weight:600;color:#00247d;background:#e8edf8;border-radius:6px;padding:3px 10px;margin-bottom:12px;letter-spacing:.2px}.quiz-options{display:flex;flex-direction:column;align-items:stretch;gap:12px;margin-bottom:24px}.quiz-option{display:flex;align-items:flex-start;gap:14px;background:#fff;border:2px solid #e0e0e0;border-radius:12px;padding:16px 20px;cursor:pointer;text-align:left;width:100%;font-family:inherit;transition:border-color .15s,background .15s}@media(max-width:540px){.quiz-option{padding:14px 16px}}.quiz-option:hover:not(:disabled){border-color:#c5cfeb;background:#f8faff}.quiz-option:disabled{cursor:default}.quiz-option.correct{border-color:#00247d;background:#e8edf8}.quiz-option.wrong{border-color:#cf1b2b;background:#fbe9eb}.option-key{font-size:16px;font-weight:800;color:#00247d;min-width:24px;flex-shrink:0;padding-top:1px}.quiz-option.correct .option-key{color:#00247d}.quiz-option.wrong .option-key{color:#a8141f}.option-text{font-size:15px;color:#333;line-height:1.5}.quiz-explanation{background:#fff;border:1px solid #e0e0e0;border-radius:12px;padding:18px;margin-bottom:20px}.explanation-status{font-size:16px;font-weight:700;margin-bottom:10px}.explanation-status.correct{color:#00247d}.explanation-status.wrong{color:#a8141f}.explanation-correct-label{font-size:14px;font-weight:600;color:#00247d;margin-bottom:8px}.explanation-text{font-size:14px;color:#555;line-height:1.6}.quiz-next-btn{width:100%;padding:16px;background:#00247d;color:#fff;border:none;border-radius:12px;font-size:17px;font-weight:700;font-family:inherit;cursor:pointer;transition:opacity .15s,transform .1s}.quiz-next-btn:hover{opacity:.9}.quiz-next-btn:active{transform:scale(.98)}@keyframes shimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.skel{background:linear-gradient(90deg,#e8edf2 25%,#f4f6f9,#e8edf2 75%);background-size:800px 100%;animation:shimmer 1.4s infinite linear;border-radius:8px}.skel--h18{height:18px}.skel--h22{height:22px}.skel--h28{height:28px}.skel--w80{width:80px}.skel--w100{width:100px}.skel--w120{width:120px}.skel--w70pct{width:70%}.skel--w80pct{width:80%}.skel--w100pct{width:100%}.skel--option{height:54px;border-radius:12px}.quiz-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;gap:16px;color:#666;font-size:16px}.spinner{width:40px;height:40px;border:4px solid #e0e0e0;border-top-color:#00247d;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.quiz-topbar{display:flex;align-items:center;gap:12px;margin-bottom:18px;font-size:13px;min-height:27px}.quiz-topbar-right{margin-left:auto;display:flex;align-items:center;gap:14px}.quiz-exit{display:inline-flex;align-items:center;gap:4px;color:#666;text-decoration:none;font-weight:600}.quiz-exit:hover{color:#00247d}.quiz-mode-badge{display:inline-flex;align-items:center;gap:5px;background:#e8edf8;color:#00247d;border-radius:999px;padding:4px 11px;font-weight:700;font-size:12px;letter-spacing:.02em}.quiz-mode-badge.exam{background:#00247d;color:#fff}.quiz-switch-mode{color:#00247d;white-space:nowrap;font-weight:600;text-decoration:underline;text-underline-offset:3px}.quiz-resume-note{background:#fbe9eb;border:1px solid #f3c3c8;color:#a8141f;border-radius:10px;padding:10px 14px;font-size:13px;margin-bottom:16px}.quiz-resume-note button{background:none;border:none;padding:0;font:inherit;font-weight:700;color:#00247d;text-decoration:underline;cursor:pointer}.quiz-timer{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:#00247d;font-variant-numeric:tabular-nums}.quiz-timer.urgent{color:#a8141f;animation:pulse 1s ease-in-out infinite}@keyframes pulse{50%{opacity:.55}}.quiz-question-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;min-height:27px}.quiz-question-meta .quiz-section-tag{margin-bottom:0}.quiz-values-hint{color:#a8141f;font-weight:600}.quiz-flag-btn{display:inline-flex;align-items:center;gap:5px;background:#fff;border:1px solid #e0e0e0;color:#666;border-radius:999px;padding:5px 11px;font:inherit;font-size:12px;font-weight:600;cursor:pointer;flex-shrink:0;transition:background .15s,border-color .15s,color .15s}.quiz-flag-btn:hover{border-color:#cf1b2b;color:#a8141f}.quiz-flag-btn.active{background:#fbe9eb;border-color:#cf1b2b;color:#a8141f}.quiz-option.selected{border-color:#00247d;background:#e8edf8}.quiz-option.selected .option-key{color:#00247d}.quiz-exam-actions{display:flex;gap:10px}.quiz-exam-actions .quiz-next-btn{flex:1}.quiz-next-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.quiz-back-btn{padding:16px 20px;background:#fff;color:#00247d;border:2px solid #c5cfeb;border-radius:12px;font-size:15px;font-weight:700;font-family:inherit;cursor:pointer}.quiz-back-btn:disabled{opacity:.4;cursor:not-allowed}.quiz-kbd-hint{display:none;font-size:12px;color:#9aa3b2;white-space:nowrap}.quiz-kbd-hint kbd{display:inline-block;padding:1px 6px;border:1px solid #d5dbe5;border-bottom-width:2px;border-radius:5px;background:#fff;font-family:inherit;font-size:11px;color:#5a6478}@media(hover:hover)and (min-width:700px){.quiz-kbd-hint{display:inline}}.quiz-empty{text-align:center;padding:48px 20px;background:#fff;border-radius:16px;box-shadow:0 2px 8px #00000014}.quiz-empty h2{font-size:22px;font-weight:800;margin:0 0 8px;color:#1a1a1a}.quiz-empty p{color:#666;margin:0 0 20px}.quiz-next-btn--link{display:inline-block;width:auto;text-decoration:none;padding:14px 28px}.quiz-main{flex:1;display:flex;flex-direction:column}.quiz-main>astro-island{flex:1;display:flex;flex-direction:column}.quiz-main .quiz-currency-note{margin-top:auto}.quiz-feedback-slot{min-height:236px}