:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--success: #16a34a;--success-light: #dcfce7;--warning: #ca8a04;--warning-light: #fef9c3;--danger: #dc2626;--danger-light: #fee2e2;--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;--sidebar-width: 256px;--header-height: 64px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--gray-50);color:var(--gray-800);line-height:1.5}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e3a5f,#2563eb)}.login-card{background:#fff;border-radius:12px;padding:40px;width:100%;max-width:420px;box-shadow:0 20px 60px #0000004d}.login-logo{text-align:center;margin-bottom:32px}.login-logo h1{font-size:24px;color:var(--gray-800);font-weight:700}.login-logo p{color:var(--gray-500);font-size:14px;margin-top:4px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:600;color:var(--gray-700);margin-bottom:6px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1px solid var(--gray-300);border-radius:8px;font-size:14px;transition:border-color .2s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all 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20px;color:var(--gray-400);text-decoration:none;font-size:14px;transition:all .2s}.sidebar-nav a:hover{background:#ffffff1a;color:#fff;text-decoration:none}.sidebar-nav a.active{background:var(--primary);color:#fff}.sidebar-footer{padding:16px 20px;border-top:1px solid rgba(255,255,255,.1)}.sidebar-footer a{display:flex;align-items:center;gap:8px;color:var(--gray-400);text-decoration:none;font-size:14px;padding:8px 0}.sidebar-footer a:hover{color:#fff;text-decoration:none}.main-content{flex:1;margin-left:var(--sidebar-width)}.top-header{height:var(--header-height);background:#fff;border-bottom:1px solid var(--gray-200);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:50}.top-header h1{font-size:20px;font-weight:600}.top-header-right{display:flex;align-items:center;gap:16px;color:var(--gray-600);font-size:14px}.page-content{padding:24px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 1px 3px #0000001a}.stat-card .stat-label{font-size:13px;color:var(--gray-500);margin-bottom:8px}.stat-card .stat-value{font-size:28px;font-weight:700;color:var(--gray-800)}.stat-card .stat-sub{font-size:12px;color:var(--gray-400);margin-top:4px}.card{background:#fff;border-radius:12px;box-shadow:0 1px 3px #0000001a;margin-bottom:24px}.card-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--gray-200)}.card-header h3{font-size:16px;font-weight:600}.card-body{padding:20px}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse}table th{text-align:left;padding:12px 16px;font-size:13px;font-weight:600;color:var(--gray-500);background:var(--gray-50);border-bottom:1px solid var(--gray-200)}table td{padding:12px 16px;font-size:14px;border-bottom:1px solid var(--gray-100)}table tbody tr:hover{background:var(--gray-50)}.badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}.badge-success{background:var(--success-light);color:var(--success)}.badge-warning{background:var(--warning-light);color:var(--warning)}.badge-danger{background:var(--danger-light);color:var(--danger)}.badge-gray{background:var(--gray-100);color:var(--gray-600)}.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}.alert-error{background:var(--danger-light);color:var(--danger);border:1px solid #fca5a5}.alert-success{background:var(--success-light);color:var(--success);border:1px solid #86efac}.tabs{display:flex;gap:4px;border-bottom:2px solid var(--gray-200);margin-bottom:24px}.tab{padding:12px 20px;font-size:14px;font-weight:500;color:var(--gray-500);background:none;border:none;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s}.tab:hover{color:var(--gray-700)}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:#fff;border-radius:12px;padding:24px;width:100%;max-width:480px;box-shadow:0 20px 60px #0000004d}.modal h3{font-size:18px;margin-bottom:16px}.modal-footer{display:flex;justify-content:flex-end;gap:8px;margin-top:24px}.empty-state{text-align:center;padding:48px 24px;color:var(--gray-400)}.empty-state .icon{font-size:48px;margin-bottom:16px}.empty-state p{font-size:14px}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.detail-field{margin-bottom:12px}.detail-field label{display:block;font-size:12px;color:var(--gray-500);margin-bottom:4px}.detail-field span{font-size:14px;color:var(--gray-800)}.loading{display:flex;align-items:center;justify-content:center;padding:48px;color:var(--gray-400)}@media (max-width: 768px){.sidebar{width:100%;position:static}.main-content{margin-left:0}.stats-grid{grid-template-columns:1fr 1fr}.detail-grid{grid-template-columns:1fr}}