:root{--color-primary:#4F6BFF;--color-primary-light:#7B8FFF;--color-primary-dark:#3A50CC;--color-primary-bg:#EEF1FF;--color-success:#22C55E;--color-success-bg:#F0FFF4;--color-danger:#EF4444;--color-danger-bg:#FFF5F5;--color-warning:#F59E0B;--color-warning-bg:#FFFBEB;--color-info:#3B82F6;--color-info-bg:#EFF6FF;--color-purple:#8B5CF6;--color-purple-bg:#F0F0FF;--color-bg:#F8F9FC;--color-surface:#FFFFFF;--color-surface-hover:#F1F3F9;--color-border:#E5E7EB;--color-text:#1A1D2B;--color-text-secondary:#6B7280;--color-text-muted:#9CA3AF;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--shadow-sm:0 1px 3px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.06);--shadow-md:0 4px 12px rgba(0,0,0,0.06),0 2px 4px rgba(0,0,0,0.04);--shadow-lg:0 12px 32px rgba(0,0,0,0.08),0 4px 8px rgba(0,0,0,0.04);--shadow-xl:0 20px 50px rgba(0,0,0,0.12);--transition:0.2s cubic-bezier(0.4,0,0.2,1);--font:"Inter",-apple-system,BlinkMacSystemFont,sans-serif}[data-theme=dark]{--color-primary:#6B82FF;--color-primary-light:#8FA0FF;--color-primary-dark:#5570FF;--color-primary-bg:#1E2340;--color-success:#34D399;--color-success-bg:#0D2818;--color-danger:#F87171;--color-danger-bg:#2D1215;--color-warning:#FBBF24;--color-warning-bg:#2D2205;--color-info:#60A5FA;--color-info-bg:#1E3A5F;--color-purple:#A78BFA;--color-purple-bg:#251E40;--color-bg:#0F1117;--color-surface:#1A1D2B;--color-surface-hover:#252836;--color-border:#2E3247;--color-text:#E8EAF0;--color-text-secondary:#9CA3B4;--color-text-muted:#6B7280;--shadow-sm:0 1px 3px rgba(0,0,0,0.2),0 1px 2px rgba(0,0,0,0.3);--shadow-md:0 4px 12px rgba(0,0,0,0.3),0 2px 4px rgba(0,0,0,0.2);--shadow-lg:0 12px 32px rgba(0,0,0,0.4),0 4px 8px rgba(0,0,0,0.2);--shadow-xl:0 20px 50px 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var(--color-border);border-radius:50%;background:var(--color-surface);color:var(--color-text-secondary);box-shadow:var(--shadow-sm);cursor:pointer}.sidebar-collapse-btn:focus-visible,.sidebar-collapse-btn:hover{color:var(--color-primary);border-color:var(--color-primary)}.sidebar-collapse-btn svg{width:16px;height:16px}.sidebar-logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--color-primary);text-decoration:none}.sidebar-logo svg{width:28px;height:28px}.sidebar-nav{flex:1 1;padding:16px 12px;display:flex;flex-direction:column;gap:4px;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--color-text-secondary);text-decoration:none;font-size:.875rem;font-weight:500;transition:all var(--transition);cursor:pointer;border:none;background:none;width:100%;text-align:left;min-height:42px}.nav-item:hover{background:var(--color-surface-hover);color:var(--color-text)}.nav-item.active{background:var(--color-primary-bg);color:var(--color-primary);font-weight:600}.nav-item svg{width:20px;height:20px;flex-shrink:0}.nav-section-title{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);padding:16px 12px 6px}.main-content{flex:1 1;min-width:0;margin-left:260px;display:flex;justify-content:center}.main-content-inner{width:100%;max-width:1200px;padding:32px 40px}@media (min-width:769px){.sidebar.collapsed{width:72px}.sidebar.collapsed .nav-item span,.sidebar.collapsed .nav-item>svg:not(:first-child),.sidebar.collapsed .sidebar-logo span{display:none!important}.sidebar.collapsed .nav-section-title,.sidebar.collapsed .sidebar-footer-sync,.sidebar.collapsed 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var(--transition)}.breadcrumb a:hover{color:var(--color-primary)}.breadcrumb svg{width:14px;height:14px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:20px;gap:20px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px;transition:all var(--transition);cursor:pointer;position:relative;overflow:hidden;text-decoration:none;color:inherit}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--color-primary-light)}.card:active{transform:translateY(0) scale(.99);transition-duration:.1s}.card-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.25rem}.card h3{font-size:1.1rem;font-weight:600;margin-bottom:6px}.card p{color:var(--color-text-secondary);font-size:.85rem;line-height:1.5}.card-meta{gap:16px;margin-top:16px;font-size:.8rem;color:var(--color-text-muted)}.card-meta,.card-meta span{display:flex;align-items:center}.card-meta span{gap:4px}.card-meta svg{width:14px;height:14px}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition);border:none;text-decoration:none}.btn svg{width:18px;height:18px}.btn-primary{background:var(--color-primary);color:white;box-shadow:0 2px 8px rgba(79,107,255,.3)}.btn-primary:hover{background:var(--color-primary-dark);box-shadow:0 4px 16px rgba(79,107,255,.4);transform:translateY(-1px)}.btn:active{transform:translateY(0) scale(.98);transition-duration:.1s}.btn-primary:active{box-shadow:0 1px 4px rgba(79,107,255,.25)}.btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-surface-hover);border-color:var(--color-primary-light)}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover{background:var(--color-surface-hover);color:var(--color-text)}.btn-danger{background:var(--color-danger);color:white}.btn-danger:hover{background:#DC2626}.btn-success{background:var(--color-success);color:white}.btn-sm{padding:6px 14px;font-size:.8rem}.btn-lg{padding:14px 28px;font-size:1rem;border-radius:var(--radius-md)}.btn-group{display:flex;gap:8px;flex-wrap:wrap}.quiz-container{max-width:800px;margin:0 auto}.quiz-progress{display:flex;align-items:center;gap:16px;margin-bottom:32px}.quiz-progress-bar{flex:1 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auto;text-align:center}.results-header{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:48px;margin-bottom:24px;box-shadow:var(--shadow-md)}.results-score{position:relative;width:160px;height:160px;margin:0 auto 24px}.results-score-circle{width:100%;height:100%;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-direction:column}.results-score-number{font-size:3rem;font-weight:800;line-height:1}.results-score-label{font-size:.85rem;color:var(--color-text-secondary);margin-top:4px}.results-stats{display:flex;justify-content:center;gap:40px;margin-top:24px}.results-stat{text-align:center}.results-stat-value{font-size:1.5rem;font-weight:700}.results-stat-label{font-size:.8rem;color:var(--color-text-secondary)}.results-detail-list{display:flex;flex-direction:column;gap:8px;text-align:left}.results-detail-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:16px 20px;display:flex;align-items:flex-start;gap:12px;transition:all var(--transition)}.results-detail-item:hover{box-shadow:var(--shadow-sm)}.results-detail-icon{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}.results-detail-icon.correct{background:var(--color-success-bg);color:var(--color-success)}.results-detail-icon.incorrect{background:var(--color-danger-bg);color:var(--color-danger)}.results-detail-text{font-size:.875rem;line-height:1.5}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px;margin-bottom:32px}.stat-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;display:flex;align-items:center;gap:16px;transition:all 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var(--transition);background:var(--color-surface);color:var(--color-text)}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(79,107,255,.1)}textarea.form-input{resize:vertical;min-height:80px}.mode-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:16px;gap:16px}.mode-card{background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all var(--transition);text-align:center}.mode-card:hover{border-color:var(--color-primary-light);box-shadow:var(--shadow-md);transform:translateY(-2px)}.mode-card.selected{border-color:var(--color-primary);background:var(--color-primary-bg);box-shadow:0 0 0 3px rgba(79,107,255,.15)}.mode-card-icon{width:52px;height:52px;border-radius:var(--radius-md);background:var(--color-primary-bg);color:var(--color-primary);display:flex;align-items:center;justify-content:center;margin:0 auto 12px}.mode-card h3{font-size:.95rem;font-weight:600;margin-bottom:4px}.mode-card p{font-size:.8rem;color:var(--color-text-secondary)}.upload-zone{border:2px dashed var(--color-border);border-radius:var(--radius-lg);padding:48px;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--color-surface)}.upload-zone:hover{border-color:var(--color-primary);background:var(--color-primary-bg)}.upload-zone svg{width:40px;height:40px;color:var(--color-text-muted);margin-bottom:12px}.upload-zone p{color:var(--color-text-secondary);font-size:.9rem}.upload-zone-highlight{color:var(--color-primary);font-weight:600}.format-guide{border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background:var(--color-surface)}.format-guide-header{display:flex;align-items:stretch}.format-guide-toggle{flex:1 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code{padding:2px 6px;border-radius:var(--radius-sm);background:var(--color-primary-bg);color:var(--color-primary);font-size:.8rem;font-weight:600;font-family:SF Mono,Fira Code,Consolas,monospace}.format-guide-fields{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:8px;gap:8px;margin-bottom:16px}.format-guide-field{display:flex;align-items:baseline;gap:8px;padding:8px 12px;border-radius:var(--radius-sm);background:var(--color-bg);border:1px solid var(--color-border)}.format-guide-field code{flex-shrink:0}.format-guide-field span{font-size:.8rem;color:var(--color-text-muted);line-height:1.4}.format-guide-example{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border)}.format-guide-example-header{padding:8px 14px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);background:var(--color-surface-hover);border-bottom:1px solid var(--color-border)}.format-guide-code{margin:0;padding:16px;background:#1a1b26;color:#a9b1d6;font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.8rem;line-height:1.7;overflow-x:auto;-moz-tab-size:2;tab-size:2}@media (max-width:768px){.format-guide-header{align-items:stretch;flex-direction:column}.format-guide-vis-link{border-top:1px solid var(--color-border);border-left:0}.format-guide-fields{grid-template-columns:1fr}}.progress-ring{position:relative;display:inline-flex}.progress-ring-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem}.tag{display:inline-flex;align-items:center;padding:4px 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