:root{--primary: #bc9700;--primary-hover: #9e7f00;--primary-light: rgba(188, 151, 0, .08);--primary-medium: rgba(188, 151, 0, .2);--bg-app: #f4f6f8;--bg-card: #ffffff;--bg-header: #1e1e24;--text-main: #1f2937;--text-muted: #6b7280;--text-light: #f9fafb;--border: #e5e7eb;--border-gold: rgba(188, 151, 0, .3);--success: #10b981;--success-light: rgba(16, 185, 129, .1);--error: #ef4444;--error-light: rgba(239, 68, 68, .1);--warning: #f59e0b;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 18px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -1px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .05), 0 4px 6px -2px rgba(188, 151, 0, .08);--shadow-gold: 0 8px 20px -6px rgba(188, 151, 0, .25);--font-family: "Inter", system-ui, -apple-system, sans-serif;--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-app);color:var(--text-main);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-app)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary-medium)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.app-container{display:flex;min-height:100vh}.sidebar{width:260px;background-color:var(--bg-header);color:var(--text-light);display:flex;flex-direction:column;flex-shrink:0;border-right:1px solid rgba(255,255,255,.05)}.sidebar-brand{padding:24px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.05)}.brand-icon{width:32px;height:32px;border-radius:8px;background-color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;color:#fff}.sidebar-menu{flex:1;padding:16px;list-style:none;display:flex;flex-direction:column;gap:8px}.menu-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);color:#9ca3af;text-decoration:none;cursor:pointer;transition:var(--transition-fast);border:1px solid transparent}.menu-item:hover{background-color:#ffffff08;color:var(--text-light)}.menu-item.active{background-color:var(--primary-light);color:var(--primary);border-color:#bc970033;font-weight:500}.sidebar-footer{padding:16px;border-top:1px solid rgba(255,255,255,.05)}.main-content{flex:1;display:flex;flex-direction:column;min-width:0;overflow-y:auto}.header{height:70px;background-color:var(--bg-card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 32px}.header-user{display:flex;align-items:center;gap:16px}.user-badge{background-color:var(--primary-light);color:var(--primary);padding:4px 8px;border-radius:4px;font-size:11px;font-weight:600;letter-spacing:.05em}.content-body{flex:1;padding:32px;max-width:1400px;width:100%;margin:0 auto;animation:fadeIn var(--transition-normal)}.card{background-color:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:24px;margin-bottom:24px;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.card:hover{box-shadow:var(--shadow-md)}.card-gold{border-left:4px solid var(--primary);box-shadow:var(--shadow-gold)}.card-title{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--text-main);display:flex;align-items:center;justify-content:space-between}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-bottom:32px}.stat-card{background-color:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border);padding:24px;display:flex;align-items:center;gap:20px}.stat-icon{width:52px;height:52px;border-radius:12px;background-color:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center}.stat-info{display:flex;flex-direction:column}.stat-value{font-size:24px;font-weight:700;color:var(--text-main)}.stat-label{font-size:13px;color:var(--text-muted)}.form-group{margin-bottom:20px}.form-label{display:block;font-size:13px;font-weight:550;margin-bottom:6px;color:var(--text-main)}.form-control{width:100%;padding:10px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);font-size:14px;transition:var(--transition-fast);background-color:#fff}.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #bc970026}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:var(--transition-fast);border:1px solid transparent}.btn:active{transform:scale(.98)}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);box-shadow:var(--shadow-gold)}.btn-secondary{background-color:#fff;border-color:var(--border);color:var(--text-main)}.btn-secondary:hover{background-color:var(--bg-app);border-color:var(--text-muted)}.btn-danger{background-color:var(--error);color:#fff}.btn-danger:hover{background-color:#dc2626}.btn-sm{padding:6px 12px;font-size:12px}.table-responsive{width:100%;overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-md);background-color:var(--bg-card)}.table{width:100%;border-collapse:collapse;text-align:left}.table th{background-color:var(--bg-app);padding:14px 18px;font-size:12px;font-weight:600;text-transform:uppercase;color:var(--text-muted);letter-spacing:.05em;border-bottom:1px solid var(--border)}.table td{padding:14px 18px;border-bottom:1px solid var(--border);font-size:14px;color:var(--text-main)}.table tr:last-child td{border-bottom:none}.table tr:hover td{background-color:#00000003}.badge{display:inline-flex;padding:3px 8px;border-radius:9999px;font-size:11px;font-weight:500;text-transform:uppercase}.badge-success{background-color:var(--success-light);color:var(--success)}.badge-danger{background-color:var(--error-light);color:var(--error)}.badge-warning{background-color:#f59e0b1a;color:var(--warning)}.badge-primary{background-color:var(--primary-light);color:var(--primary)}.split-screen-container{display:flex;height:calc(100vh - 70px);overflow:hidden}.pdf-panel{flex:1;border-right:1px solid var(--border);background-color:#525659;display:flex;flex-direction:column}.pdf-viewer-fallback{color:#fff;padding:32px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;gap:16px}.answer-grid-panel{width:450px;flex-shrink:0;background-color:var(--bg-card);display:flex;flex-direction:column;overflow-y:auto}.test-header{padding:24px;border-bottom:1px solid var(--border)}.test-timer{font-size:20px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:8px}.bubble-sheet-container{flex:1;padding:24px;display:flex;flex-direction:column;gap:16px}.bubble-row{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:var(--radius-sm);background-color:var(--bg-app);border:1px solid transparent;transition:var(--transition-fast)}.bubble-row:hover{border-color:var(--primary-medium)}.bubble-number{font-weight:700;font-size:14px;width:32px}.bubble-options{display:flex;gap:8px}.bubble{width:32px;height:32px;border-radius:50%;border:1.5px solid var(--text-muted);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;cursor:pointer;transition:var(--transition-fast);background-color:#fff;-webkit-user-select:none;user-select:none}.bubble:hover{border-color:var(--primary);color:var(--primary)}.bubble.selected{background-color:var(--primary);border-color:var(--primary);color:#fff;box-shadow:var(--shadow-gold)}.custom-progress-bar{height:10px;background-color:var(--border);border-radius:9999px;overflow:hidden;position:relative;width:100%}.custom-progress-fill{height:100%;background-color:var(--primary);border-radius:9999px;transition:width .4s ease}.net-status-badge{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--radius-sm);font-size:12px;font-weight:550}.net-online{background-color:var(--success-light);color:var(--success)}.net-offline{background-color:var(--error-light);color:var(--error);animation:pulse 1.5s infinite}@media (max-width: 1024px){.app-container{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid rgba(255,255,255,.05)}.sidebar-menu{flex-direction:row;flex-wrap:wrap;padding:12px;gap:4px}.menu-item{padding:8px 12px;font-size:13px}}