:root{--primary:#667eea;--secondary:#764ba2;--success:#28a745;--danger:#dc3545;--warning:#ffc107;--info:#17a2b8;--light:#f8f9fa;--dark:#343a40;--gray-200:#e9ecef;--gray-400:#ced4da;--gray-600:#6c757d}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#333;background-color:#fff;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.login-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;display:flex}.login-box{background:#fff;border-radius:12px;width:100%;max-width:400px;padding:40px;animation:.3s ease-out slideUp;box-shadow:0 10px 40px #0000004d}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-header{text-align:center;margin-bottom:30px}.login-header h1{color:#333;margin:0 0 10px;font-size:32px;font-weight:700}.login-header p{color:#666;margin:0;font-size:14px}.login-content{flex-direction:column;gap:20px;display:flex}.google-login-wrapper{justify-content:center;display:flex}.google-login-btn{color:#333;cursor:pointer;background:#fff;border:1px solid #e0e0e0;border-radius:8px;justify-content:center;align-items:center;gap:10px;width:100%;padding:12px 24px;font-size:16px;font-weight:500;transition:all .3s;display:flex}.google-login-btn:hover{background:#f8f8f8;box-shadow:0 2px 8px #0000001a}.google-login-btn:active{transform:scale(.98)}.login-info{background:#f5f5f5;border-radius:8px;padding:20px}.login-info p{color:#666;margin:0 0 15px;font-size:14px;font-weight:500}.login-info ul{margin:0;padding:0;list-style:none}.login-info li{color:#666;margin-bottom:8px;padding-left:25px;font-size:14px;position:relative}.login-info li:last-child{margin-bottom:0}@media (width<=480px){.login-box{margin:20px;padding:30px 20px}.login-header h1{font-size:24px}}.chat-container{background:#fff;height:100vh;display:flex;overflow:hidden}.chat-sidebar{background:#fff;border-right:1px solid #e5e5e5;flex-direction:column;width:300px;display:flex;overflow-y:auto}.chat-header-sidebar{border-bottom:1px solid #e5e5e5;justify-content:space-between;align-items:center;padding:15px;display:flex}.chat-header-sidebar h2{color:#333;margin:0;font-size:20px}.logout-btn{cursor:pointer;background:0 0;border:none;border-radius:50%;padding:5px;font-size:20px;transition:background .2s}.user-info{border-bottom:1px solid #e5e5e5;align-items:center;gap:10px;padding:15px;display:flex}.user-avatar-sidebar{object-fit:cover;border-radius:50%;width:45px;height:45px}.user-details{flex:1;min-width:0}.user-name{color:#333;white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:14px;font-weight:600;overflow:hidden}.user-email{color:#999;white-space:nowrap;text-overflow:ellipsis;margin:3px 0 0;font-size:12px;overflow:hidden}.users-list{flex:1;padding:10px;overflow-y:auto}.users-list h3{color:#666;margin:0 5px 10px;font-size:14px;font-weight:600}.no-users{text-align:center;color:#999;padding:20px;font-size:14px}.user-item{cursor:pointer;border-radius:8px;align-items:center;gap:10px;margin-bottom:5px;padding:10px;transition:background .2s;display:flex}.user-item:hover{background:#f5f5f5}.user-item.active{background:#e3f2fd}.user-avatar{object-fit:cover;border-radius:50%;width:40px;height:40px}.user-item-info{flex:1;min-width:0}.user-item-name{color:#333;white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:13px;font-weight:600;overflow:hidden}.user-item-email{color:#999;white-space:nowrap;text-overflow:ellipsis;margin:3px 0 0;font-size:11px;overflow:hidden}.chat-main{background:#fff;flex-direction:column;flex:1;display:flex}.no-chat-selected{background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%);flex:1;justify-content:center;align-items:center;display:flex}.empty-state{text-align:center;color:#666}.empty-state h2{color:#333;margin:0 0 10px;font-size:28px}.empty-state p{margin:0;font-size:16px}.chat-message-header{background:#fff;border-bottom:1px solid #e5e5e5;padding:15px 20px}.chat-header-info{align-items:center;gap:12px;display:flex}.chat-header-info img{object-fit:cover;border-radius:50%;width:40px;height:40px}.chat-header-info h3{color:#333;margin:0;font-size:16px;font-weight:600}.chat-header-info p{color:#999;margin:3px 0 0;font-size:12px}.messages-container{background:#fff;flex-direction:column;flex:1;gap:10px;padding:20px;display:flex;overflow-y:auto}.no-messages{color:#999;flex:1;justify-content:center;align-items:center;font-size:14px;display:flex}.message{margin-bottom:8px;display:flex}.message.sent{justify-content:flex-end}.message.received{justify-content:flex-start}.message-content{word-wrap:break-word;border-radius:12px;max-width:70%;padding:10px 15px}.message.sent .message-content{color:#fff;background:#007bff}.message.received .message-content{color:#333;background:#e5e5e5}.message-content p{margin:0 0 5px;font-size:14px}.message-time{opacity:.7;font-size:11px;display:block}.message-input-form{background:#fff;border-top:1px solid #e5e5e5;gap:10px;padding:15px 20px;display:flex}.message-input{border:1px solid #e5e5e5;border-radius:24px;outline:none;flex:1;padding:10px 15px;font-size:14px;transition:border-color .2s}.message-input:focus{border-color:#007bff}.send-btn{color:#fff;cursor:pointer;background:#007bff;border:none;border-radius:24px;padding:10px 25px;font-size:14px;font-weight:600;transition:background .2s}.send-btn:hover:not(:disabled){background:#0056b3}.send-btn:disabled{cursor:not-allowed;background:#ccc}.chat-loading{color:#666;justify-content:center;align-items:center;height:100vh;font-size:18px;display:flex}.chat-sidebar::-webkit-scrollbar{width:8px}.messages-container::-webkit-scrollbar{width:8px}.users-list::-webkit-scrollbar{width:8px}.chat-sidebar::-webkit-scrollbar-track{background:#f1f1f1}.messages-container::-webkit-scrollbar-track{background:#f1f1f1}.users-list::-webkit-scrollbar-track{background:#f1f1f1}.chat-sidebar::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.messages-container::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.users-list::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.chat-sidebar::-webkit-scrollbar-thumb:hover{background:#555}.messages-container::-webkit-scrollbar-thumb:hover{background:#555}.users-list::-webkit-scrollbar-thumb:hover{background:#555}@media (width<=768px){.chat-sidebar{width:250px}.message-content{max-width:85%}}@media (width<=480px){.chat-container{flex-direction:column}.chat-sidebar{border-bottom:1px solid #e5e5e5;border-right:none;width:100%;height:auto;max-height:200px}.chat-main{flex:1}.message-content{max-width:90%}}.admin-container{background:#f5f7fa;min-height:100vh}.admin-header{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:space-between;align-items:center;padding:30px 40px;display:flex;box-shadow:0 4px 15px #0000001a}.admin-title h1{margin:0;font-size:28px;font-weight:700}.admin-title p{opacity:.9;margin:5px 0 0;font-size:14px}.admin-header-actions{align-items:center;gap:20px;display:flex}.admin-user-info{align-items:center;gap:10px;display:flex}.admin-user-avatar{object-fit:cover;border:2px solid #fff;border-radius:50%;width:40px;height:40px}.admin-user-name{font-size:14px;font-weight:500}.logout-btn{color:#fff;cursor:pointer;background:#fff3;border:1px solid #ffffff4d;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-size:20px;transition:all .3s;display:flex}.logout-btn:hover{background:#ffffff4d}.admin-content{max-width:1400px;margin:0 auto;padding:40px}.stats-row{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-bottom:40px;display:grid}.stat-card{text-align:center;background:#fff;border-radius:10px;padding:25px;box-shadow:0 2px 8px #00000014}.stat-number{color:#667eea;margin-bottom:10px;font-size:36px;font-weight:700}.stat-label{color:#666;font-size:14px;font-weight:500}.admin-panel{background:#fff;border-radius:10px;margin-bottom:30px;overflow:hidden;box-shadow:0 2px 8px #00000014}.panel-header{border-bottom:1px solid #e5e5e5;justify-content:space-between;align-items:center;padding:25px;display:flex}.panel-header h2{color:#333;margin:0;font-size:20px}.sort-controls{align-items:center;gap:10px;display:flex}.sort-controls label{color:#666;font-size:14px;font-weight:500}.sort-controls select{cursor:pointer;background:#fff;border:1px solid #e5e5e5;border-radius:6px;padding:8px 12px;font-size:14px;transition:border-color .2s}.sort-controls select:focus{border-color:#667eea;outline:none}.users-table-wrapper{overflow-x:auto}.users-table{border-collapse:collapse;width:100%}.users-table thead{background:#f9fafb}.users-table th{text-align:left;color:#666;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid #e5e5e5;padding:15px 20px;font-size:13px;font-weight:600}.users-table td{color:#333;border-bottom:1px solid #f0f0f0;padding:15px 20px;font-size:14px}.user-row{transition:background .2s}.user-row:hover{background:#f9fafb}.user-cell{font-weight:600}.user-row-info{align-items:center;gap:10px;display:flex}.user-row-info img{object-fit:cover;border-radius:50%;width:32px;height:32px}.status-badge{border-radius:20px;padding:5px 12px;font-size:12px;font-weight:600;display:inline-block}.status-badge.online{color:#155724;background:#d4edda}.status-badge.offline{color:#383d41;background:#e2e3e5}.role-badge{border-radius:20px;padding:5px 12px;font-size:12px;font-weight:600;display:inline-block}.role-badge.admin{color:#004085;background:#cce5ff}.role-badge.user{color:#856404;background:#fff3cd}.no-users-message{text-align:center;color:#999;padding:40px;font-size:16px}.info-box{background:#fff;border-left:4px solid #667eea;border-radius:10px;padding:25px;box-shadow:0 2px 8px #00000014}.info-box h3{color:#333;margin:0 0 15px;font-size:16px}.info-box ul{margin:0;padding:0;list-style:none}.info-box li{color:#666;padding:8px 0;font-size:14px}.admin-loading{color:#666;background:#f5f7fa;justify-content:center;align-items:center;height:100vh;font-size:18px;display:flex}@media (width<=768px){.admin-header{text-align:center;flex-direction:column;gap:20px}.admin-content{padding:20px}.panel-header{flex-direction:column;align-items:flex-start;gap:15px}.stats-row{grid-template-columns:1fr}.users-table{font-size:12px}.users-table th,.users-table td{padding:10px}}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}