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.35);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .5);--nav-backdrop: rgba(11, 13, 16, .88)}[data-theme=light]{--bg-app: #f8f9fa;--bg-surface: #ffffff;--bg-surface-elevated: #f1f3f5;--bg-surface-subtle: #e9ecef;--bg-surface-hover: #dee2e6;--bg-primary: #f8f9fa;--bg-secondary: #ffffff;--bg-tertiary: #f1f3f5;--text-primary: #111827;--text-secondary: #4b5563;--text-muted: #8c97a5;--text-inverse: #ffffff;--border-subtle: rgba(0, 0, 0, .07);--border-default: rgba(0, 0, 0, .12);--border-hover: rgba(0, 0, 0, .22);--border-focus: #2563eb;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-subtle: rgba(37, 99, 235, .08);--primary-border: rgba(37, 99, 235, .25);--primary-text: #1d4ed8;--success: #059669;--success-subtle: rgba(5, 150, 105, .08);--success-text: #047857;--success-border: rgba(5, 150, 105, .25);--warning: #d97706;--warning-subtle: rgba(217, 119, 6, .08);--warning-text: #b45309;--warning-border: rgba(217, 119, 6, .25);--error: #dc2626;--error-subtle: rgba(220, 38, 38, .08);--error-text: #b91c1c;--danger-text: #b91c1c;--danger-border: rgba(220, 38, 38, .25);--accent-cyan: #0284c7;--accent-emerald: #059669;--accent-rose: #e11d48;--accent-purple: #7c3aed;--accent-amber: #d97706;--font-heading: var(--font-sans);--font-body: var(--font-sans);--cbt-answered: #059669;--cbt-unanswered: #d97706;--cbt-review: #7c3aed;--cbt-unvisited: #f1f3f5;--cbt-unvisited-border: rgba(0, 0, 0, .1);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .05), 0 1px 2px rgba(0, 0, 0, .03);--shadow-md: 0 4px 14px rgba(0, 0, 0, .06);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .08);--nav-backdrop: rgba(248, 249, 250, .92)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-app);color:var(--text-primary);font-family:var(--font-sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;transition:background-color var(--trans-base),color 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var(--space-6)}}.exam-main{flex:1;max-width:1040px;width:100%;margin:0 auto;padding:var(--space-4);padding-bottom:90px;display:grid;grid-template-columns:1fr;gap:var(--space-5)}@media (min-width: 960px){.exam-main{grid-template-columns:1fr 310px;gap:var(--space-6);padding:var(--space-6);padding-bottom:90px}}.exam-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);display:flex;flex-direction:column;gap:var(--space-5);box-shadow:var(--shadow-sm)}.question-text{font-size:1.12rem;line-height:1.7;font-weight:500;color:var(--text-primary);white-space:pre-line}.options-stack{display:flex;flex-direction:column;gap:var(--space-3);margin-top:var(--space-2)}.option-item{display:flex;align-items:flex-start;gap:var(--space-3);padding:14px 16px;border-radius:var(--radius-md);border:1px solid var(--border-default);background:var(--bg-surface);color:var(--text-primary);cursor:pointer;transition:all 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var(--space-6)}}.exam-footer-inner{max-width:1040px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)}.exam-palette-sidebar{display:none;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-4);position:sticky;top:72px;height:fit-content;max-height:calc(100vh - 150px);overflow-y:auto}@media (min-width: 960px){.exam-palette-sidebar{display:block}}.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:var(--space-3)}.palette-item,.palette-btn{width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.82rem;font-weight:700;border:1px solid var(--border-subtle);background:var(--cbt-unvisited);color:var(--text-muted);cursor:pointer;transition:all var(--trans-fast)}.palette-item.current,.palette-btn.current{border:2px solid var(--primary)!important;outline:2px solid var(--primary-subtle);transform:scale(1.06)}.palette-item.answered,.palette-btn.palette-answered,.palette-answered{background:var(--cbt-answered)!important;color:#fff!important;border-color:var(--cbt-answered)!important}.palette-item.unanswered,.palette-btn.palette-unanswered,.palette-unanswered{background:var(--cbt-unanswered)!important;color:#fff!important;border-color:var(--cbt-unanswered)!important}.palette-item.marked,.palette-btn.palette-review,.palette-review{background:var(--cbt-review)!important;color:#fff!important;border-color:var(--cbt-review)!important}.palette-btn.palette-review-answered,.palette-review-answered{background:var(--cbt-review)!important;color:#fff!important;border:2px solid var(--cbt-answered)!important}.palette-item.unvisited,.palette-btn.palette-unvisited,.palette-unvisited{background:var(--cbt-unvisited);color:var(--text-muted);border-color:var(--cbt-unvisited-border)}.palette-legend{display:flex;flex-direction:column;gap:8px;font-size:.78rem;color:var(--text-secondary)}.legend-item{display:flex;align-items:center;gap:8px}.legend-dot{width:12px;height:12px;border-radius:50%;flex-shrink:0}.cbt-timer{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--radius-full);font-family:var(--font-mono);font-weight:700;font-size:.92rem;border:1px solid var(--border-subtle);background:var(--bg-surface);color:var(--text-primary);transition:all 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var(--border-default);color:var(--text-primary)}.section-pill-bar{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}.section-pill-bar::-webkit-scrollbar{display:none}.section-pill{display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--radius-full);font-size:.8rem;font-weight:600;border:1px solid var(--border-subtle);background:var(--bg-surface);color:var(--text-secondary);cursor:pointer;transition:all var(--trans-fast);white-space:nowrap}.section-pill:hover{color:var(--text-primary);border-color:var(--border-default);background:var(--bg-surface-elevated)}.section-pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}.option-card{display:flex;align-items:flex-start;gap:var(--space-3);padding:14px 16px;border-radius:var(--radius-md);border:1px solid var(--border-default);background:var(--bg-surface);color:var(--text-primary);cursor:pointer;transition:all var(--trans-fast);touch-action:manipulation;-webkit-user-select:none;user-select:none;margin-bottom:10px}.option-card:hover{border-color:var(--border-hover);background:var(--bg-surface-elevated)}.option-card.selected{border-color:var(--primary);background:var(--primary-subtle)}.option-letter{width:28px;height:28px;border-radius:var(--radius-sm);background:var(--bg-surface-subtle);color:var(--text-secondary);font-weight:700;font-size:.85rem;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--trans-fast)}.option-card.selected .option-letter{background:var(--primary);color:#fff}.mission-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-sm);margin-bottom:var(--space-6)}.streak-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-full);background:#f59e0b1f;color:var(--accent-amber);border:1px solid rgba(245,158,11,.25);font-size:.78rem;font-weight:700}.cutoff-progress-container{margin-top:14px;padding:12px 14px;background:var(--bg-surface-subtle);border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.cutoff-track{height:8px;border-radius:var(--radius-full);background:var(--bg-surface-elevated);overflow:hidden;margin-top:8px}.cutoff-bar{height:100%;border-radius:var(--radius-full);background:linear-gradient(90deg,var(--primary),var(--accent-cyan));transition:width .4s ease}.recommendation-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-5);display:flex;justify-content:space-between;align-items:center;gap:var(--space-4);margin-bottom:var(--space-3);transition:all var(--trans-fast)}.recommendation-card:hover{border-color:var(--border-default);background:var(--bg-surface-elevated)}.glass-panel-hover:hover{border-color:var(--border-hover);background:var(--bg-surface-elevated);cursor:pointer}.mobile-drawer-overlay,.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#000000a6;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:var(--space-4)}.mobile-drawer-content{width:100%;max-width:540px;background:var(--bg-surface-elevated);border-radius:var(--radius-xl);padding:var(--space-6);max-height:85vh;overflow-y:auto;border:1px solid var(--border-default);box-shadow:var(--shadow-lg);animation:modalFadeIn var(--trans-fast)}.cbt-palette-toggle-mobile{display:flex}@media (min-width: 960px){.cbt-palette-toggle-mobile{display:none!important}}.cbt-sidebar-palette{display:none;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-4);position:sticky;top:72px;height:fit-content;max-height:calc(100vh - 150px);overflow-y:auto}@media (min-width: 960px){.cbt-sidebar-palette{display:block}}.progress-bar-track{width:100%;height:6px;background:var(--bg-surface-subtle);border-radius:var(--radius-full);overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary);border-radius:var(--radius-full);transition:width .3s ease}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#0009;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:var(--space-4);animation:modalFadeIn var(--trans-fast)}.modal-content{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-xl);max-width:480px;width:100%;padding:var(--space-6);box-shadow:var(--shadow-lg);max-height:90vh;overflow-y:auto}@keyframes modalFadeIn{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-default);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}