:root{--primary: #4F46E5;--primary-hover: #4338ca;--primary-light: #e0e7ff;--success: #10b981;--success-light: #d1fae5;--warning: #f59e0b;--warning-light: #fef3c7;--danger: #ef4444;--danger-light: #fee2e2;--info: #3b82f6;--info-light: #dbeafe;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--type-single: #3b82f6;--type-multiple: #8b5cf6;--type-judge: #10b981;--type-fill: #f59e0b;--type-essay: #ef4444;--diff-easy: #10b981;--diff-easy-medium: #34d399;--diff-medium: #3b82f6;--diff-hard: #f59e0b;--diff-harder: #ef4444;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-sm: 4px;--radius: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;--transition-fast: .15s ease-in-out;--transition: .25s ease-in-out;--transition-slow: .35s ease-in-out;--sidebar-width: 260px;--sidebar-collapsed-width: 72px;--header-height: 64px}@media(prefers-color-scheme:dark){:root{--gray-50: #111827;--gray-100: #1f2937;--gray-200: #374151;--gray-300: #4b5563;--gray-400: #6b7280;--gray-500: #9ca3af;--gray-600: #d1d5db;--gray-700: #e5e7eb;--gray-800: #f3f4f6;--gray-900: #f9fafb}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-sans);font-size:1rem;line-height:1.6;color:var(--gray-800);background-color:var(--gray-50);min-height:100vh}a{color:var(--primary);text-decoration:none;transition:color 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1rem;font-size:.875rem;font-weight:500;border-radius:var(--radius);transition:all var(--transition-fast);white-space:nowrap;border:1px solid transparent}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,#6366f1 100%);color:#fff;box-shadow:0 2px 4px #4f46e533}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #4f46e54d}.btn-secondary{background:var(--gray-100);color:var(--gray-700);border-color:var(--gray-200)}.btn-secondary:hover:not(:disabled){background:var(--gray-200)}.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-outline:hover:not(:disabled){background:var(--primary-light)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-lg{padding:.75rem 1.5rem;font-size:1rem}.btn-sm{padding:.25rem .75rem;font-size:.75rem}.btn-xs{padding:.125rem .5rem;font-size:.7rem}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border-radius:var(--radius);color:var(--gray-500);transition:all var(--transition-fast)}.icon-btn:hover{background:var(--gray-100);color:var(--gray-700)}.icon-btn-sm{width:28px;height:28px}.form-input{width:100%;padding:.625rem .875rem;font-size:.875rem;color:var(--gray-800);background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);transition:all var(--transition-fast)}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-input::placeholder{color:var(--gray-400)}.form-input-lg{padding:.75rem 1rem;font-size:1rem}.form-select{width:100%;padding:.625rem 2.5rem .625rem .875rem;font-size:.875rem;color:var(--gray-800);background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right .75rem center;border:1px solid var(--gray-200);border-radius:var(--radius);appearance:none;cursor:pointer;transition:all var(--transition-fast)}.form-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.checkbox{display:inline-flex;align-items:center;gap:var(--spacing-sm);cursor:pointer;-webkit-user-select:none;user-select:none}.checkbox input[type=checkbox]{width:16px;height:16px;accent-color:var(--primary)}.card{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}.card-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg);border-bottom:1px solid var(--gray-100)}.card-header h2{font-size:1.125rem;font-weight:600;color:var(--gray-900)}.card-body{padding:var(--spacing-lg)}.card-footer{display:flex;align-items:center;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-lg);border-top:1px solid var(--gray-100);background:var(--gray-50)}.badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;font-size:.7rem;font-weight:600;color:#fff;background:var(--primary);border-radius:var(--radius-full)}.hot-badge{background:linear-gradient(135deg,#f59e0b,#ef4444);animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.8}}.badge-dot{position:absolute;top:6px;right:6px;width:8px;height:8px;background:var(--danger);border-radius:50%;border:2px solid white}.tag{display:inline-flex;align-items:center;padding:.25rem .75rem;font-size:.75rem;font-weight:500;color:var(--gray-700);background:var(--gray-100);border-radius:var(--radius-full);gap:var(--spacing-xs)}.type-badge-sm{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:22px;padding:0 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0;background:var(--gray-100)}.dropdown-menu{position:absolute;top:100%;right:0;min-width:180px;padding:var(--spacing-sm) 0;margin-top:var(--spacing-sm);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:100;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all var(--transition-fast)}.dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:.625rem 1rem;font-size:.875rem;color:var(--gray-700);transition:all var(--transition-fast)}.dropdown-item:hover{background:var(--gray-100)}.search-box{position:relative;display:flex;align-items:center}.search-box svg{position:absolute;left:.75rem;color:var(--gray-400)}.search-box input{padding-left:2.5rem}.progress-bar{height:8px;background:var(--gray-200);border-radius:var(--radius-full);overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary);border-radius:var(--radius-full);transition:width 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spin{to{transform:rotate(360deg)}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.grid{display:grid}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}.hidden{display:none!important}.text-center{text-align:center}.text-right{text-align:right}.w-full{width:100%}.h-full{height:100%}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.p-sm{padding:var(--spacing-sm)}.p-md{padding:var(--spacing-md)}.p-lg{padding:var(--spacing-lg)}.rounded{border-radius:var(--radius)}.rounded-lg{border-radius:var(--radius-lg)}.shadow{box-shadow:var(--shadow)}.shadow-lg{box-shadow:var(--shadow-lg)}#app{width:100%;min-height:100vh}.page-content{padding:var(--spacing-lg);max-width:1400px;margin:0 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var(--transition)}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.stat-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:var(--radius-md);flex-shrink:0}.stat-content{flex:1}.stat-value{font-size:1.75rem;font-weight:700;color:var(--gray-900);line-height:1.2}.stat-label{font-size:.875rem;color:var(--gray-500);margin-top:.25rem}.stat-change{font-size:.75rem;margin-top:.25rem}.stat-change.positive{color:var(--success)}.stat-change.negative{color:var(--danger)}.stat-change.neutral{color:var(--gray-400)}.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.stat-item{text-align:center;padding:var(--spacing-lg);background:linear-gradient(135deg,white 0%,var(--gray-50) 100%);border-radius:var(--radius-lg);border:1px solid var(--gray-100)}.stat-item .stat-value{font-size:2rem;font-weight:700;color:var(--primary)}.stat-item .stat-label{font-size:.875rem;color:var(--gray-500);margin-top:.25rem}.required{color:var(--danger)}.form-group{margin-bottom:var(--spacing-md)}.form-group label{display:block;font-size:.875rem;font-weight:500;color:var(--gray-700);margin-bottom:.5rem}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-md)}.form-hint{font-size:.75rem;color:var(--gray-400);margin-top:.25rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);text-align:center}.empty-state-icon{width:120px;height:120px;margin-bottom:var(--spacing-lg);color:var(--gray-300)}.empty-state-title{font-size:1.125rem;font-weight:600;color:var(--gray-700);margin-bottom:var(--spacing-sm)}.empty-state-desc{font-size:.875rem;color:var(--gray-500);max-width:320px}@media(max-width:768px){.page-header{flex-direction:column;gap:var(--spacing-md)}.header-actions{width:100%;flex-direction:column}.header-actions .btn{width:100%}.filter-bar{flex-direction:column;align-items:stretch}.filter-group{flex-direction:column}.stats-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}}.sidebar[data-v-eace9cb7]{width:var(--sidebar-width);background:#fff;border-right:1px solid var(--gray-200);display:flex;flex-direction:column;transition:width var(--transition);flex-shrink:0}.sidebar.collapsed[data-v-eace9cb7]{width:var(--sidebar-collapsed-width)}.sidebar-header[data-v-eace9cb7]{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg);border-bottom:1px solid var(--gray-100)}.logo[data-v-eace9cb7]{display:flex;align-items:center;gap:var(--spacing-md)}.logo span[data-v-eace9cb7]{font-size:1rem;font-weight:600;color:var(--gray-900);white-space:nowrap}.collapse-btn[data-v-eace9cb7]{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;border-radius:var(--radius-sm);color:var(--gray-400);transition:all 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white}.badge-count[data-v-8c7b7e37]{position:absolute;top:4px;right:4px;min-width:16px;height:16px;padding:0 4px;background:var(--danger);color:#fff;font-size:.65rem;font-weight:600;border-radius:8px;display:flex;align-items:center;justify-content:center;border:2px solid white}@media(max-width:1024px){.search-box[data-v-8c7b7e37]{display:none}}@media(max-width:768px){.header-right .icon-btn[data-v-8c7b7e37]:not(:last-child){display:none}.user-info[data-v-8c7b7e37]{display:none}}.app-container[data-v-f7beeef3]{display:flex;min-height:100vh;background:var(--gray-50)}.main-content[data-v-f7beeef3]{flex:1;display:flex;flex-direction:column;min-width:0;transition:margin-left var(--transition)}.content-area[data-v-f7beeef3]{flex:1;padding:0;background:var(--gray-50)}.content-area[data-v-f7beeef3]>*{animation:fadeIn-f7beeef3 .3s ease-out}@keyframes 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