:root{--bg-primary: #0a0e17;--bg-secondary: #111827;--bg-card: #1a2035;--bg-hover: #1e2a42;--border: #2a3550;--text-primary: #e8ecf4;--text-secondary: #8892a4;--text-muted: #5a6478;--accent: #00f0ff;--accent-dim: rgba(0, 240, 255, .15);--accent-glow: rgba(0, 240, 255, .3);--danger: #ff4d6a;--danger-dim: rgba(255, 77, 106, .15);--success: #34d399;--warning: #fbbf24;--font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--radius: 12px;--radius-sm: 8px;--shadow: 0 4px 20px rgba(0, 0, 0, .3);--transition: .2s ease}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;width:100%;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:radial-gradient(ellipse at 50% 20%,rgba(0,240,255,.06) 0%,var(--bg-primary) 60%)}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:48px 40px;width:100%;max-width:420px;box-shadow:var(--shadow);text-align:center}.login-card h1{font-size:24px;font-weight:700;margin-bottom:4px;color:var(--accent)}.login-card .subtitle{font-size:15px;color:var(--text-secondary);margin-bottom:32px}.login-card .icon{font-size:48px;margin-bottom:16px}.input-group{position:relative;margin-bottom:20px}.input-group input{width:100%;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;color:var(--text-primary);font-size:15px;font-family:var(--font);outline:none;transition:border var(--transition)}.input-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.input-group input::placeholder{color:var(--text-muted)}.btn-primary{width:100%;padding:14px 24px;background:linear-gradient(135deg,var(--accent),#0080ff);border:none;border-radius:var(--radius-sm);color:#000;font-size:15px;font-weight:600;font-family:var(--font);cursor:pointer;transition:opacity var(--transition),transform var(--transition)}.btn-primary:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.login-error{background:var(--danger-dim);border:1px solid var(--danger);border-radius:var(--radius-sm);padding:10px 14px;margin-bottom:16px;color:var(--danger);font-size:13px}.login-note{margin-top:20px;font-size:12px;color:var(--text-muted)}.admin-layout{display:flex;height:100vh}.sidebar{width:240px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-logo{padding:24px 20px;border-bottom:1px solid var(--border)}.sidebar-logo h2{font-size:16px;font-weight:700;color:var(--accent)}.sidebar-logo span{font-size:12px;color:var(--text-muted)}.sidebar-nav{flex:1;padding:12px 8px;display:flex;flex-direction:column;gap:2px}.sidebar-nav button{display:flex;align-items:center;gap:10px;width:100%;padding:10px 14px;background:none;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:14px;font-family:var(--font);cursor:pointer;transition:all var(--transition);text-align:left}.sidebar-nav button:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-nav button.active{background:var(--accent-dim);color:var(--accent);font-weight:500}.sidebar-nav button .nav-icon{font-size:18px;width:24px;text-align:center}.sidebar-footer{padding:16px;border-top:1px solid var(--border)}.sidebar-footer .session-info{font-size:11px;color:var(--text-muted);margin-bottom:8px}.btn-logout{width:100%;padding:8px;background:var(--danger-dim);border:1px solid transparent;border-radius:var(--radius-sm);color:var(--danger);font-size:13px;font-family:var(--font);cursor:pointer;transition:all var(--transition)}.btn-logout:hover{border-color:var(--danger);background:#ff4d6a40}.main-content{flex:1;overflow-y:auto;padding:28px 32px}.page-title{font-size:22px;font-weight:700;margin-bottom:24px;display:flex;align-items:center;gap:10px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:32px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:border-color var(--transition),box-shadow var(--transition)}.stat-card:hover{border-color:var(--accent);box-shadow:0 0 20px var(--accent-dim)}.stat-card .stat-icon{font-size:28px;margin-bottom:8px}.stat-card .stat-value{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:4px}.stat-card .stat-label{font-size:13px;color:var(--text-secondary)}.stat-card.accent .stat-value{color:var(--accent)}.stat-card.danger .stat-value{color:var(--danger)}.stat-card.success .stat-value{color:var(--success)}.stat-card.warning .stat-value{color:var(--warning)}.table-toolbar{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}.search-input{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text-primary);font-size:14px;font-family:var(--font);outline:none;width:300px;transition:border var(--transition)}.search-input:focus{border-color:var(--accent)}.search-input::placeholder{color:var(--text-muted)}.table-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.data-table{width:100%;border-collapse:collapse}.data-table th{background:var(--bg-secondary);padding:12px 16px;text-align:left;font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none}.data-table th:hover{color:var(--text-secondary)}.data-table td{padding:12px 16px;font-size:13px;border-bottom:1px solid var(--border);color:var(--text-primary)}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background:var(--bg-hover)}.data-table .user-id-link{color:var(--accent);cursor:pointer;text-decoration:none;font-weight:500}.data-table .user-id-link:hover{text-decoration:underline}.cost-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:12px;font-weight:500}.cost-badge.high{background:var(--danger-dim);color:var(--danger)}.cost-badge.medium{background:#fbbf2426;color:var(--warning)}.cost-badge.low{background:#34d39926;color:var(--success)}.pagination{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-top:1px solid var(--border);font-size:13px;color:var(--text-secondary)}.pagination-controls{display:flex;gap:8px}.pagination-controls button{padding:6px 14px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;font-family:var(--font);cursor:pointer;transition:all var(--transition)}.pagination-controls button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.pagination-controls button:disabled{opacity:.3;cursor:not-allowed}.user-detail-page{max-width:800px}.user-detail-header{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px}.user-detail-header .user-name{font-size:20px;font-weight:700;margin-bottom:4px}.user-detail-header .user-email{font-size:14px;color:var(--text-secondary);margin-bottom:12px}.user-meta{display:flex;gap:24px;flex-wrap:wrap;font-size:13px;color:var(--text-secondary)}.user-meta span{display:flex;align-items:center;gap:6px}.section-title{font-size:16px;font-weight:600;margin-bottom:12px;display:flex;align-items:center;gap:8px}.token-usage-list{display:grid;gap:12px;margin-bottom:24px}.token-usage-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;display:flex;justify-content:space-between;align-items:center}.token-usage-item .model-name{font-weight:600;margin-bottom:4px}.token-usage-item .model-stats{font-size:12px;color:var(--text-secondary)}.token-usage-item .model-cost{font-size:18px;font-weight:700;color:var(--accent)}.btn-danger{padding:12px 24px;background:var(--danger-dim);border:1px solid var(--danger);border-radius:var(--radius-sm);color:var(--danger);font-size:14px;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:13px;font-family:var(--font);cursor:pointer;transition:all var(--transition);margin-bottom:16px}.btn-back:hover{border-color:var(--accent);color:var(--accent)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .15s ease}.modal-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;width:100%;max-width:480px;box-shadow:var(--shadow)}.modal-card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--danger)}.modal-card p{font-size:14px;color:var(--text-secondary);margin-bottom:8px}.modal-card ul{list-style:none;padding:0;margin-bottom:24px}.modal-card ul li{font-size:13px;color:var(--text-secondary);padding:3px 0}.modal-card ul li:before{content:"• ";color:var(--danger)}.modal-actions{display:flex;gap:12px;justify-content:flex-end}.btn-cancel{padding:10px 20px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-family:var(--font);cursor:pointer;transition:all var(--transition)}.btn-cancel:hover{border-color:var(--text-muted)}.btn-danger-confirm{padding:10px 20px;background:var(--danger);border:none;border-radius:var(--radius-sm);color:#fff;font-size:14px;font-weight:600;font-family:var(--font);cursor:pointer;transition:opacity var(--transition)}.btn-danger-confirm:hover{opacity:.85}.btn-danger-confirm:disabled{opacity:.4;cursor:not-allowed}.charts-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}.chart-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.chart-card h3{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text-secondary)}.chart-card canvas{max-height:300px}.chart-card.full-width{grid-column:1 / -1}.loading-spinner{display:flex;align-items:center;justify-content:center;padding:60px;color:var(--text-muted);font-size:15px}.error-message{background:var(--danger-dim);border:1px solid var(--danger);border-radius:var(--radius-sm);padding:14px 18px;color:var(--danger);font-size:14px;margin-bottom:16px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.main-content>*{animation:slideUp .2s ease}.support-filters{display:flex;align-items:center;gap:16px;margin-bottom:20px;flex-wrap:wrap}.support-filter-tabs{display:flex;gap:4px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:4px}.support-filter-btn{padding:8px 16px;background:none;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:13px;font-family:var(--font);cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:6px}.support-filter-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.support-filter-btn.active{background:var(--accent-dim);color:var(--accent);font-weight:600}.support-filter-count{background:var(--accent-dim);color:var(--accent);padding:1px 6px;border-radius:10px;font-size:11px;font-weight:700}.support-search{flex:1;min-width:200px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text-primary);font-size:13px;font-family:var(--font);outline:none;transition:border var(--transition)}.support-search:focus{border-color:var(--accent)}.support-search::placeholder{color:var(--text-muted)}.support-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.support-list{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.support-empty-list{padding:60px 20px;text-align:center;color:var(--text-muted);font-size:14px}.support-table{width:100%;border-collapse:collapse}.support-table th{background:var(--bg-secondary);padding:10px 12px;text-align:left;font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}.support-table td{padding:10px 12px;font-size:12px;border-bottom:1px solid var(--border);color:var(--text-primary)}.support-row{cursor:pointer;transition:background var(--transition)}.support-row:hover td{background:var(--bg-hover)}.support-row.selected td{background:var(--accent-dim)}.support-row.unread td{font-weight:600}.support-cell-id{white-space:nowrap;position:relative}.support-cell-email{max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.support-cell-subject{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.support-cell-date{white-space:nowrap;font-size:11px;color:var(--text-secondary)}.support-unread-badge{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:var(--accent);color:#000;font-size:10px;font-weight:800;margin-left:6px}.support-status{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;white-space:nowrap}.support-status.status-new{background:#fbbf2426;color:var(--warning)}.support-status.status-progress{background:#4488ff26;color:#48f}.support-status.status-closed{background:#34d39926;color:var(--success)}.support-detail{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;max-height:calc(100vh - 200px);overflow:hidden}.support-empty-detail{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-muted);font-size:14px}.support-empty-icon{font-size:40px;margin-bottom:12px}.support-detail-header{padding:16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}.support-detail-title{font-size:16px;font-weight:700;color:var(--accent);margin-bottom:6px}.support-detail-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--text-secondary)}.support-detail-email,.support-detail-date{display:flex;align-items:center;gap:4px}.support-detail-actions{display:flex;gap:6px;align-items:center}.support-status-select{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;color:var(--text-primary);font-size:12px;font-family:var(--font);outline:none;cursor:pointer}.support-btn-delete,.support-btn-close{width:32px;height:32px;border-radius:8px;border:1px solid var(--border);background:var(--bg-secondary);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.support-btn-delete:hover{background:var(--danger-dim);border-color:var(--danger)}.support-btn-close:hover{border-color:var(--text-muted)}.support-chat{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.support-chat-empty{text-align:center;padding:40px;color:var(--text-muted)}.support-bubble{max-width:80%;padding:10px 14px;border-radius:14px;font-size:13px;line-height:1.5;word-break:break-word}.support-bubble.user{align-self:flex-start;background:var(--bg-secondary);border:1px solid var(--border);border-radius:14px 14px 14px 4px}.support-bubble.admin{align-self:flex-end;background:var(--accent-dim);border:1px solid rgba(0,240,255,.25);border-radius:14px 14px 4px}.support-bubble-sender{font-size:10px;font-weight:700;margin-bottom:4px}.support-bubble.user .support-bubble-sender{color:var(--text-muted)}.support-bubble.admin .support-bubble-sender{color:var(--accent)}.support-bubble-text{color:var(--text-primary)}.support-bubble-attachment{margin-top:8px}.support-bubble-attachment img{max-width:100%;max-height:200px;border-radius:8px;cursor:pointer;transition:opacity var(--transition)}.support-bubble-attachment img:hover{opacity:.8}.support-bubble-time{font-size:10px;color:var(--text-muted);margin-top:4px}.support-reply-form{padding:12px 16px;border-top:1px solid var(--border)}.support-reply-result{padding:8px 12px;border-radius:var(--radius-sm);font-size:12px;font-weight:600;margin-bottom:8px;text-align:center}.support-reply-result.success{background:#34d39926;color:var(--success)}.support-reply-result.error{background:var(--danger-dim);color:var(--danger)}.support-reply-file{font-size:12px;color:var(--accent);margin-bottom:8px;display:flex;align-items:center;gap:6px}.support-reply-file .remove-file{color:var(--danger);cursor:pointer;font-size:14px}.support-reply-row{display:flex;gap:8px;align-items:flex-end}.support-reply-textarea{flex:1;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 12px;color:var(--text-primary);font-size:13px;font-family:var(--font);outline:none;resize:none;min-height:40px;max-height:100px;line-height:1.4}.support-reply-textarea:focus{border-color:var(--accent)}.support-btn-attach,.support-btn-send{width:38px;height:38px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-secondary);cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;transition:all var(--transition);flex-shrink:0}.support-btn-attach:hover{border-color:var(--accent)}.support-btn-send{background:var(--accent);border-color:var(--accent);color:#000;box-shadow:0 2px 8px var(--accent-glow)}.support-btn-send:hover:not(:disabled){opacity:.85}.support-btn-send:disabled{opacity:.4;cursor:not-allowed}@media(max-width:1024px){.sidebar{width:200px}.charts-grid{grid-template-columns:1fr}}@media(max-width:768px){.admin-layout{flex-direction:column}.sidebar{width:100%;flex-direction:row;border-right:none;border-bottom:1px solid var(--border)}.sidebar-nav{flex-direction:row;overflow-x:auto}.sidebar-footer{display:none}.main-content{padding:16px}.stats-grid{grid-template-columns:1fr 1fr}}