:root{--bg-primary: #0f1219;--bg-secondary: #1a1d2e;--bg-card: #1e2340;--bg-input: #262b47;--bg-hover: #2a3050;--border-color: #2d3354;--text-primary: #e8eaed;--text-secondary: #9ba0b5;--text-muted: #6b7194;--accent: #4f8cff;--accent-hover: #3a7bf5;--accent-light: rgba(79, 140, 255, .12);--success: #34d399;--warning: #fbbf24;--danger: #ef4444;--danger-hover: #dc2626;--sidebar-width: 220px;--header-height: 56px}html,body,#app{height:100%;background:var(--bg-primary);color:var(--text-primary);font-size:14px;line-height:1.5}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--bg-primary) 0%,#0a0e1a 100%)}.login-card{width:400px;padding:40px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px}.login-card h1{text-align:center;font-size:24px;font-weight:600;margin-bottom:8px}.login-card .subtitle{text-align:center;color:var(--text-secondary);margin-bottom:32px;font-size:14px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;color:var(--text-secondary);font-size:13px}.form-input{width:100%;padding:10px 14px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-size:14px;outline:none;transition:border-color .2s}.form-input:focus{border-color:var(--accent)}.form-input::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;gap:6px}.btn-primary{background:var(--accent);color:#fff;width:100%}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:var(--danger-hover)}.btn-warning{background:var(--warning);color:#1a1d2e}.btn-warning:hover{background:#f59e0b}.btn-outline{background:transparent;border:1px solid var(--border-color);color:var(--text-primary)}.btn-outline:hover{background:var(--bg-hover)}.btn-sm{padding:6px 12px;font-size:12px}.btn-xs{padding:4px 8px;font-size:11px;border-radius:4px}.admin-layout{display:flex;height:100vh}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color)}.sidebar-header h2{font-size:18px;font-weight:600;color:var(--text-primary)}.sidebar-header .sub{font-size:12px;color:var(--text-muted);margin-top:2px}.sidebar-nav{flex:1;padding:12px 8px;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 14px;margin-bottom:2px;border-radius:8px;color:var(--text-secondary);cursor:pointer;transition:all .15s;font-size:14px}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{background:var(--accent-light);color:var(--accent);font-weight:500}.nav-item .icon{font-size:18px;width:22px;text-align:center}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border-color)}.sidebar-footer .user-info{font-size:13px;color:var(--text-secondary)}.sidebar-footer .logout-btn{font-size:12px;color:var(--danger);cursor:pointer;margin-top:4px;display:inline-block}.sidebar-footer .logout-btn:hover{color:var(--danger-hover)}.sidebar-footer-actions{display:flex;align-items:center;gap:12px;margin-top:4px}.sidebar-footer .change-pwd-btn{font-size:12px;color:var(--accent);cursor:pointer;display:inline-block}.sidebar-footer .change-pwd-btn:hover{color:var(--accent-hover)}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.page-header{padding:20px 28px 0}.page-header h1{font-size:22px;font-weight:600}.page-body{flex:1;padding:20px 28px 28px;overflow-y:auto}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:20px;margin-bottom:16px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:20px}.stat-card .stat-label{font-size:13px;color:var(--text-secondary);margin-bottom:8px}.stat-card .stat-value{font-size:28px;font-weight:700;color:var(--text-primary)}.stat-card .stat-sub{font-size:12px;color:var(--text-muted);margin-top:4px}.table-wrapper{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border-color);font-size:13px}th{color:var(--text-secondary);font-weight:500;white-space:nowrap}th.sortable{cursor:pointer;-webkit-user-select:none;user-select:none}th.sortable:hover{color:var(--accent)}.sort-icon{display:inline-block;margin-left:4px;font-size:11px;color:var(--text-muted)}th.sortable:hover .sort-icon{color:var(--accent)}td{color:var(--text-primary)}tr:hover td{background:var(--bg-hover)}.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:500}.badge-success{background:#34d39926;color:var(--success)}.badge-warning{background:#fbbf2426;color:var(--warning)}.badge-danger{background:#ef444426;color:var(--danger)}.badge-info{background:#4f8cff26;color:var(--accent)}.pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:20px}.pagination button{padding:6px 12px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:6px;color:var(--text-primary);cursor:pointer;font-size:13px}.pagination button:disabled{opacity:.4;cursor:not-allowed}.pagination button:hover:not(:disabled){background:var(--bg-hover)}.pagination .page-info{color:var(--text-secondary);font-size:13px}.toolbar{display:flex;gap:12px;align-items:center;margin-bottom:16px}.toolbar .btn{width:auto}.search-bar{display:flex;gap:12px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.search-bar .form-input{width:240px}.search-bar .btn{width:auto}.alert{padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:12px}.alert-error{background:#ef44441f;color:var(--danger);border:1px solid rgba(239,68,68,.2)}.alert-success{background:#34d3991f;color:var(--success);border:1px solid rgba(52,211,153,.2)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.modal-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:28px;width:480px;max-width:90vw;max-height:80vh;overflow-y:auto}.modal-content h2{font-size:18px;margin-bottom:16px}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}.modal-actions .btn{width:auto}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state .icon{font-size:48px;margin-bottom:12px}.loading{text-align:center;padding:40px;color:var(--text-muted)}.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--border-color);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.sidebar{width:60px}.sidebar-header h2,.sidebar-header .sub,.nav-item span,.sidebar-footer{display:none}.nav-item{justify-content:center;padding:12px}.nav-item .icon{font-size:20px}.page-body{padding:16px}.stats-grid{grid-template-columns:repeat(2,1fr)}}