.question-nav-container{background:color-mix(in srgb, var(--practice-surface-elevated,var(--theme-card-bg)) 92%, transparent);border:1px solid var(--practice-border,var(--theme-border));transition:all var(--transition-base);box-shadow:var(--practice-shadow-sm,var(--shadow-sm));-webkit-backdrop-filter:saturate(180%)blur(18px);backdrop-filter:saturate(180%)blur(18px);border-radius:18px;margin-bottom:18px;padding:16px}.question-nav-container.collapsed{padding:10px 12px}.question-nav-header{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.nav-header-buttons{align-items:center;gap:8px;display:flex}.nav-title{color:var(--theme-text-primary);letter-spacing:0;font-size:14px;font-weight:650}.nav-toggle-btn{background:color-mix(in srgb, var(--theme-card-bg) 86%, transparent);border:1px solid var(--practice-border,var(--theme-border));cursor:pointer;color:var(--theme-text-secondary);border-radius:999px;justify-content:center;align-items:center;width:30px;height:30px;padding:0;transition:all .2s;display:flex}.nav-toggle-btn:hover{background-color:var(--theme-bg-secondary);border-color:var(--theme-accent);color:var(--theme-accent)}.sidebar-toggle-btn-in-nav{background:color-mix(in srgb, var(--theme-card-bg) 86%, transparent);border:1px solid var(--practice-border,var(--theme-border));cursor:pointer;color:var(--theme-text-secondary);border-radius:999px;justify-content:center;align-items:center;width:30px;height:30px;padding:0;transition:all .2s;display:flex}.sidebar-toggle-btn-in-nav:hover{background-color:var(--theme-bg-secondary);border-color:var(--theme-accent);color:var(--theme-accent)}.nav-toggle-btn svg,.sidebar-toggle-btn-in-nav svg{width:15px;height:15px}.question-nav-container.collapsed .question-nav-header{margin-bottom:0}.question-nav-grid{grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:8px;display:grid}.nav-btn{aspect-ratio:1;border:1px solid var(--practice-border,var(--theme-border));background:color-mix(in srgb, var(--theme-card-bg) 92%, transparent);cursor:pointer;width:100%;transition:all var(--transition-fast);color:var(--theme-text-primary);box-shadow:none;border-radius:12px;justify-content:center;align-items:center;padding:5px;font-size:14px;font-weight:600;display:flex}.nav-btn:hover{border-color:var(--theme-accent);color:var(--theme-accent)}.nav-btn.correct{background-color:var(--practice-green,#34c759)!important;color:#fff!important;border-color:var(--practice-green,#34c759)!important}.nav-btn.incorrect{background-color:var(--practice-red,#ff3b30)!important;color:#fff!important;border-color:var(--practice-red,#ff3b30)!important}.nav-btn.current{border-color:var(--practice-blue,var(--theme-accent));background-color:color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 11%, var(--theme-card-bg) 89%);color:var(--practice-blue,var(--theme-accent));box-shadow:0 0 0 3px color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 16%, transparent)}.nav-btn.current.correct{color:#fff!important;background-color:#52c41a!important;border-color:#49b115!important}.nav-btn.current.incorrect{color:#fff!important;background-color:#ff4d4f!important;border-color:#e83a3c!important}.nav-btn.not-answered{background-color:color-mix(in srgb, var(--theme-card-bg) 94%, transparent);color:var(--theme-text-secondary);border-color:var(--practice-border,var(--theme-border))}.nav-btn.locked{background-color:var(--theme-bg-secondary);color:var(--theme-text-tertiary);cursor:not-allowed;opacity:.6;position:relative}.nav-btn.locked:hover{background-color:var(--theme-bg-secondary);border-color:var(--theme-border)}.lock-icon{width:10px;height:10px;position:absolute;top:4px;right:4px}.nav-legend{color:var(--theme-text-tertiary);flex-wrap:wrap;justify-content:center;gap:14px;margin-top:14px;font-size:12px;transition:color .3s;display:flex}@media (max-width:768px){.question-nav-container{border-radius:14px;margin-bottom:10px;padding:11px}.question-nav-container.collapsed{padding:8px 10px}.question-nav-header{margin-bottom:8px}.nav-title{font-size:13px}.nav-toggle-btn,.sidebar-toggle-btn-in-nav{width:32px;height:32px}.question-nav-grid{overscroll-behavior:contain;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;max-height:168px;padding:2px;overflow-y:auto}.nav-btn{aspect-ratio:1;border-radius:10px;min-height:38px;font-size:12px}.nav-legend{gap:10px;margin-top:10px;font-size:11px}}@media (max-width:390px){.question-nav-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}.legend-item{align-items:center;display:flex}.legend-box{border:1px solid var(--practice-border,var(--theme-border));border-radius:999px;width:10px;height:10px;margin-right:6px;transition:border-color .3s}.legend-box.correct{background-color:#52c41a}.legend-box.incorrect{background-color:#ff4d4f}.legend-box.not-answered{background-color:var(--theme-card-bg);border:1px solid var(--theme-border)}
.exam-answer-sheet{border:1px solid color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 24%, var(--practice-border,var(--theme-border)) 76%);background:color-mix(in srgb, var(--practice-surface-elevated,var(--theme-card-bg)) 94%, transparent);width:min(100%,940px);box-shadow:var(--practice-shadow-sm,var(--shadow-sm));-webkit-backdrop-filter:saturate(180%)blur(18px);backdrop-filter:saturate(180%)blur(18px);border-radius:18px;margin:0 auto 16px;padding:14px 16px}.exam-answer-sheet-header{justify-content:space-between;align-items:center;gap:12px;display:flex}.exam-answer-sheet-heading{flex-wrap:wrap;align-items:baseline;gap:8px 14px;min-width:0;display:flex}.exam-answer-sheet-title,.exam-answer-sheet-summary,.exam-answer-sheet-actions,.exam-answer-sheet-mark,.exam-answer-sheet-toggle,.exam-answer-sheet-legend,.exam-answer-sheet-legend span{align-items:center;display:inline-flex}.exam-answer-sheet-title{color:var(--theme-text-primary);letter-spacing:-.01em;white-space:nowrap;gap:8px;font-size:14px;font-weight:750}.exam-answer-sheet-title svg{width:17px;height:17px;color:var(--practice-blue,var(--theme-accent))}.exam-answer-sheet-summary{color:var(--theme-text-secondary);gap:7px;font-size:12px;font-weight:600}.exam-answer-sheet-summary-separator{color:var(--theme-text-tertiary)}.exam-answer-sheet-actions{flex:none;gap:8px}.exam-answer-sheet-mark,.exam-answer-sheet-toggle{border:1px solid var(--practice-border,var(--theme-border));background:color-mix(in srgb, var(--theme-card-bg) 88%, transparent);min-height:32px;color:var(--theme-text-secondary);cursor:pointer;transition:border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);border-radius:999px}.exam-answer-sheet-mark{white-space:nowrap;gap:6px;padding:0 11px;font-size:12px;font-weight:700}.exam-answer-sheet-mark svg{width:14px;height:14px}.exam-answer-sheet-mark:hover,.exam-answer-sheet-toggle:hover{border-color:color-mix(in srgb, #f59e0b 62%, var(--practice-border,var(--theme-border)) 38%);background:color-mix(in srgb, #f59e0b 10%, var(--theme-card-bg) 90%);color:#b45309}.exam-answer-sheet-mark.is-marked{color:#b45309;background:#fff7ed;border-color:#f59e0b}.exam-answer-sheet-toggle{justify-content:center;width:32px;padding:0}.exam-answer-sheet-toggle svg{width:16px;height:16px}.exam-answer-sheet-grid{overscroll-behavior:contain;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:8px;max-height:210px;margin-top:14px;padding:2px;display:grid;overflow-y:auto}.exam-answer-sheet-question{border:1px solid var(--practice-border,var(--theme-border));background:color-mix(in srgb, var(--theme-card-bg) 94%, transparent);min-width:0;min-height:42px;color:var(--theme-text-secondary);font:inherit;cursor:default;transition:border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);border-radius:11px;justify-content:center;align-items:center;padding:5px;font-size:13px;font-weight:700;display:flex;position:relative}button.exam-answer-sheet-question{cursor:pointer}button.exam-answer-sheet-question:hover{border-color:var(--practice-blue,var(--theme-accent));color:var(--practice-blue,var(--theme-accent))}.exam-answer-sheet-question.is-answered{border-color:color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 42%, var(--practice-border,var(--theme-border)) 58%);background:color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 11%, var(--theme-card-bg) 89%);color:var(--practice-blue,var(--theme-accent))}.exam-answer-sheet-question.is-current{box-shadow:0 0 0 3px color-mix(in srgb, var(--practice-blue,var(--theme-accent)) 16%, transparent)}.exam-answer-sheet-question.is-marked{background:color-mix(in srgb, #f59e0b 14%, var(--theme-card-bg) 86%);color:#b45309;border-color:#f59e0b}.exam-answer-sheet-question.is-current.is-marked{box-shadow:0 0 0 3px #f59e0b38}.exam-answer-sheet-number{line-height:1}.exam-answer-sheet-flag{width:10px;height:10px;position:absolute;top:4px;right:4px}.exam-answer-sheet-footer{justify-content:space-between;align-items:center;gap:10px 18px;margin-top:12px;display:flex}.exam-answer-sheet-legend{color:var(--theme-text-tertiary);white-space:nowrap;flex-wrap:wrap;gap:6px 12px;font-size:11px}.exam-answer-sheet-legend span{gap:5px}.exam-answer-sheet-legend i{border:1px solid var(--practice-border,var(--theme-border));background:var(--theme-card-bg);border-radius:999px;width:9px;height:9px;display:inline-block}.exam-answer-sheet-legend i.is-answered{border-color:var(--practice-blue,var(--theme-accent));background:var(--practice-blue,var(--theme-accent))}.exam-answer-sheet-legend i.is-marked{background:#f59e0b;border-color:#f59e0b}.exam-answer-sheet-hint{color:var(--theme-text-tertiary);text-align:right;margin:0;font-size:11px;line-height:1.4}.exam-answer-sheet button:focus-visible{outline:2px solid var(--practice-blue,var(--theme-accent));outline-offset:2px}@media (max-width:640px){.exam-answer-sheet{border-radius:15px;margin-bottom:12px;padding:12px}.exam-answer-sheet-header{align-items:flex-start}.exam-answer-sheet-heading{display:block}.exam-answer-sheet-summary{margin-top:4px;display:flex}.exam-answer-sheet-mark{justify-content:center;width:32px;padding:0}.exam-answer-sheet-mark span{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.exam-answer-sheet-grid{grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;max-height:180px}.exam-answer-sheet-question{border-radius:9px;min-height:38px;font-size:12px}.exam-answer-sheet-footer{display:block}.exam-answer-sheet-hint{text-align:left;margin-top:8px}}[data-theme=black] .exam-answer-sheet-mark.is-marked{background:color-mix(in srgb, #7c2d12 48%, var(--theme-card-bg) 52%);color:#fdba74}[data-theme=black] .exam-answer-sheet-question.is-marked{background:color-mix(in srgb, #7c2d12 42%, var(--theme-card-bg) 58%);color:#fdba74}[data-theme=black] .exam-answer-sheet-legend i.is-marked{background:#f59e0b;border-color:#f59e0b}