@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";:root{--primary-color: #4f46e5;--primary-dark: #4338ca;--bg-color: #f3f4f6;--panel-bg: #ffffff;--text-main: #111827;--text-muted: #6b7280;--border-color: #e5e7eb;--message-mine-bg: #4f46e5;--message-mine-text: #ffffff;--message-mine-time: #e0e7ff;--message-others-bg: #f3f4f6;--message-others-text: #1f2937;--message-others-time: #9ca3af;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--radius-md: .5rem;--radius-lg: 1rem;--radius-xl: 1.5rem}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}.login-container{height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,#e0e7ff,#f3f4f6)}.login-box{background:var(--panel-bg);padding:40px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:420px;text-align:center;border:1px solid rgba(255,255,255,.5)}.login-box h2{font-size:1.75rem;font-weight:600;color:var(--text-main);margin-bottom:.5rem}.login-box p{color:var(--text-muted);margin-bottom:24px;font-size:.95rem}.login-box input{width:100%;padding:14px 16px;border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:20px;font-size:1rem;font-family:Inter,sans-serif;outline:none;transition:border-color .2s,box-shadow .2s;background-color:#f9fafb}.login-box input:focus{border-color:var(--primary-color);background-color:#fff;box-shadow:0 0 0 3px #4f46e526}.login-box button{width:100%;padding:14px;background:var(--primary-color);color:#fff;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s,transform .1s;box-shadow:var(--shadow-md)}.login-box button:disabled{background:#a5b4fc;cursor:not-allowed;transform:none;box-shadow:none}.login-box button:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px)}.login-box button:active:not(:disabled){transform:translateY(0)}.app-container{display:flex;justify-content:center;height:100vh;padding:24px;background:linear-gradient(135deg,#f3f4f6,#e5e7eb)}.chat-window{width:100%;max-width:1000px;background:var(--panel-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.7)}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10}.header-info h2{font-size:1.25rem;font-weight:600;margin-bottom:4px;color:var(--text-main)}.status-indicators{display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:500;color:var(--text-muted)}.status-dot{width:8px;height:8px;border-radius:50%;background:#ccc;box-shadow:0 0 0 2px #fff}.status-dot.connected{background:#10b981}.status-dot.disconnected{background:#ef4444}.header-stats{display:flex;align-items:center;gap:20px;font-size:.9rem;color:var(--text-muted)}.header-stats strong{color:var(--text-main);font-weight:600}.logout-btn{background:#f3f4f6;border:1px solid var(--border-color);color:var(--text-main);padding:8px 16px;border-radius:var(--radius-md);cursor:pointer;font-size:.85rem;font-weight:500;transition:all .2s}.logout-btn:hover{background:#e5e7eb;color:#111827}.error-banner{background:#fef2f2;color:#b91c1c;padding:12px 24px;font-size:.9rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #fee2e2;font-weight:500}.error-banner button{background:#fee2e2;border:1px solid #f87171;color:#b91c1c;padding:6px 12px;border-radius:var(--radius-md);cursor:pointer;font-weight:500;transition:background .2s}.error-banner button:hover{background:#fca5a5}.messages-area{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;background-color:#fafafa}.messages-list{display:flex;flex-direction:column;gap:20px}.loading-state,.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted)}.empty-icon{font-size:3rem;margin-bottom:16px;opacity:.8}.empty-state h3{font-size:1.25rem;color:var(--text-main);margin-bottom:8px}.empty-state p{font-size:.95rem}.message-wrapper{display:flex;flex-direction:column;width:100%}.message-content{display:flex;flex-direction:column;max-width:75%}.message-wrapper.mine,.message-wrapper.mine .message-content{align-items:flex-end}.message-wrapper.others,.message-wrapper.others .message-content{align-items:flex-start}.message-bubble{padding:12px 16px;border-radius:var(--radius-xl);position:relative;box-shadow:var(--shadow-sm);display:inline-block;min-width:60px}.message-text{word-wrap:break-word;white-space:pre-wrap;line-height:1.5;font-size:.95rem}.message-time{font-size:.7rem;display:block;text-align:right;margin-top:6px;font-weight:500}.message-sender{font-size:.75rem;color:var(--text-muted);margin-top:4px;padding:0 8px;font-weight:500}.mine .message-bubble{background:var(--message-mine-bg);color:var(--message-mine-text);border-bottom-right-radius:4px}.mine .message-time{color:var(--message-mine-time)}.others .message-bubble{background:var(--message-others-bg);color:var(--message-others-text);border-bottom-left-radius:4px;border:1px solid var(--border-color);box-shadow:none}.others .message-time{color:var(--message-others-time)}.typing-indicator{display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:500;color:var(--text-muted);padding:8px 16px;background:var(--panel-bg);border-radius:1rem;align-self:flex-start;border:1px solid var(--border-color);margin-top:-10px}.dots{display:flex;gap:4px}.dots span{width:6px;height:6px;background-color:var(--text-muted);border-radius:50%;animation:blink 1.4s infinite both}.dots span:nth-child(2){animation-delay:.2s}.dots span:nth-child(3){animation-delay:.4s}@keyframes blink{0%,to{opacity:.2;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}.chat-footer{padding:16px 24px;border-top:1px solid var(--border-color);background:var(--panel-bg);display:flex;flex-direction:column}.message-input-container{display:flex;align-items:flex-end;gap:12px}.message-input{flex:1;border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:12px 16px;resize:none;font-family:inherit;font-size:.95rem;outline:none;line-height:1.5;max-height:120px;background-color:#f9fafb;transition:border-color .2s,box-shadow .2s,background-color .2s}.message-input:focus{border-color:var(--primary-color);background-color:#fff;box-shadow:0 0 0 3px #4f46e526}.send-button{background:var(--primary-color);color:#fff;border:none;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;flex-shrink:0;box-shadow:var(--shadow-md)}.send-button svg{width:20px;height:20px;fill:currentColor;margin-left:2px}.send-button:disabled{background:#a5b4fc;cursor:not-allowed;box-shadow:none}.send-button:hover:not(:disabled){background:var(--primary-dark);transform:scale(1.05)}.send-button:active:not(:disabled){transform:scale(.95)}@media (max-width: 768px){.app-container{padding:0}.chat-window{border-radius:0;max-width:100%;border:none}.header-stats span:nth-child(2){display:none}.chat-header{padding:12px 16px}.messages-area{padding:16px}.chat-footer{padding:12px 16px}}