*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f5f5f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}#root{min-height:100vh}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.auth-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-card{background:#fff;border-radius:20px;width:100%;max-width:400px;padding:40px;animation:.5s ease-out slideUp;box-shadow:0 20px 60px #0000004d}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.auth-card h1{color:#333;margin:0 0 10px;font-size:2rem;font-weight:700}.auth-subtitle{color:#666;margin-bottom:30px;font-size:.95rem}.auth-form{flex-direction:column;gap:20px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-group label{color:#333;font-size:.9rem;font-weight:500}.form-group input{border:2px solid #e0e0e0;border-radius:10px;outline:none;padding:12px 16px;font-size:1rem;transition:all .3s}.form-group input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.auth-button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:10px;margin-top:10px;padding:14px;font-size:1rem;font-weight:600;transition:all .3s}.auth-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 20px #667eea4d}.auth-button:disabled{opacity:.6;cursor:not-allowed}.error-message{color:#c33;background:#fee;border:1px solid #fcc;border-radius:8px;margin-bottom:20px;padding:12px;font-size:.9rem}.auth-footer{text-align:center;color:#666;margin-top:25px;font-size:.9rem}.auth-footer a{color:#667eea;font-weight:600;text-decoration:none}.auth-footer a:hover{text-decoration:underline}.chat-container{background:#f5f5f5;height:100vh;display:flex}.chat-sidebar{background:#fff;border-right:1px solid #e0e0e0;flex-direction:column;width:300px;display:flex}.chat-header{border-bottom:1px solid #e0e0e0;justify-content:space-between;align-items:center;padding:20px;display:flex}.user-info{align-items:center;gap:12px;display:flex}.user-avatar{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;font-size:1.2rem;font-weight:600;display:flex}.user-name{color:#333;font-size:1rem;font-weight:600}.user-status{color:#4caf50;font-size:.85rem}.logout-button{color:#fff;cursor:pointer;background:#f44336;border:none;border-radius:8px;padding:8px 16px;font-size:.9rem;transition:all .3s}.logout-button:hover{background:#d32f2f;transform:translateY(-1px)}.users-list{flex:1;padding:20px;overflow-y:auto}.users-list h3{color:#666;text-transform:uppercase;letter-spacing:1px;margin:0 0 15px;font-size:.9rem}.user-item{cursor:pointer;border-radius:10px;align-items:center;gap:12px;margin-bottom:8px;padding:12px;transition:all .3s;display:flex}.user-item:hover{background:#f5f5f5}.user-item.active{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}.user-item.active .user-name-small{color:#fff}.user-item.active .user-status-small{color:#fffc}.user-avatar-small{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-weight:600;display:flex;position:relative}.online-indicator{background:#4caf50;border:2px solid #fff;border-radius:50%;width:12px;height:12px;position:absolute;bottom:0;right:0}.user-details{flex:1;min-width:0}.user-name-small{color:#333;white-space:nowrap;text-overflow:ellipsis;font-size:.95rem;font-weight:600;overflow:hidden}.user-status-small{color:#666;font-size:.8rem}.chat-main{background:#fff;flex-direction:column;flex:1;display:flex}.chat-messages-header{background:#fff;border-bottom:1px solid #e0e0e0;padding:20px}.selected-user-info{align-items:center;gap:12px;display:flex}.chat-messages{background:#f9f9f9;flex-direction:column;flex:1;gap:15px;padding:20px;display:flex;overflow-y:auto}.message{flex-direction:column;max-width:70%;animation:.3s ease-out slideIn;display:flex}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.sent{align-self:flex-end}.message.received{align-self:flex-start}.message-content{word-wrap:break-word;border-radius:18px;padding:12px 16px;font-size:.95rem;line-height:1.4}.message.sent .message-content{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-bottom-right-radius:4px}.message.received .message-content{color:#333;background:#e0e0e0;border-bottom-left-radius:4px}.message-time{color:#999;margin-top:4px;padding:0 4px;font-size:.75rem}.message.sent .message-time{text-align:right}.typing-indicator{background:#e0e0e0;border-radius:18px 18px 18px 4px;gap:4px;padding:12px 16px;display:flex}.typing-indicator span{background:#666;border-radius:50%;width:8px;height:8px;animation:1.4s infinite typing}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.chat-input-form{background:#fff;border-top:1px solid #e0e0e0;gap:10px;padding:20px;display:flex}.chat-input{border:2px solid #e0e0e0;border-radius:25px;outline:none;flex:1;padding:12px 16px;font-size:1rem;transition:all .3s}.chat-input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.send-button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:25px;padding:12px 24px;font-weight:600;transition:all .3s}.send-button:hover{transform:translateY(-2px);box-shadow:0 5px 15px #667eea4d}.no-chat-selected{color:#999;flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}.no-chat-icon{margin-bottom:20px;font-size:4rem}.no-chat-selected h2{color:#666;margin:0 0 10px}.no-chat-selected p{color:#999;font-size:.9rem}.chat-messages::-webkit-scrollbar{width:6px}.users-list::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:#f1f1f1}.users-list::-webkit-scrollbar-track{background:#f1f1f1}.chat-messages::-webkit-scrollbar-thumb{background:#888;border-radius:3px}.users-list::-webkit-scrollbar-thumb{background:#888;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#555}.users-list::-webkit-scrollbar-thumb:hover{background:#555}.app{min-height:100vh}