:root{--bg: #0d0d0f;--surface: #16161a;--surface2: #1e1e24;--surface3: #26262e;--border: #2a2a35;--accent: #7c6aff;--accent-soft: rgba(124, 106, 255, .12);--accent-glow: rgba(124, 106, 255, .35);--text: #e8e8f0;--text-muted: #6b6b80;--text-faint: #3a3a4a;--green: #4ade80;--red: #f87171;--yellow: #f59e0b;--msg-out: #6366f1;--msg-in: #2a2a35;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--font: "Sora", sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%;overflow:hidden}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;-webkit-font-smoothing:antialiased}button{font-family:var(--font);cursor:pointer}input,textarea{font-family:var(--font)}input[type=file]{display:none}.auth-screen{height:100%;display:flex;align-items:center;justify-content:center;padding:20px;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(124,106,255,.12) 0%,transparent 70%)}.auth-card{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:32px 28px;display:flex;flex-direction:column;gap:16px}.auth-logo{text-align:center}.auth-logo-icon{width:52px;height:52px;background:var(--accent-soft);border:1px solid var(--accent-glow);border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:10px}.auth-logo h1{font-size:20px;font-weight:600;letter-spacing:-.5px}.auth-logo p{font-size:12px;color:var(--text-muted);margin-top:3px}.auth-lang-select{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);font-size:12px;padding:5px 10px;outline:none;cursor:pointer}.auth-tabs{display:flex;background:var(--surface2);border-radius:10px;padding:3px;gap:3px}.auth-tab{flex:1;padding:8px;border:none;border-radius:var(--radius-sm);font-size:13px;font-weight:500;background:transparent;color:var(--text-muted);transition:all .2s}.auth-tab.active{background:var(--accent);color:#fff}.auth-field{display:flex;flex-direction:column;gap:6px}.auth-field label{font-size:11px;font-weight:500;color:var(--text-muted);letter-spacing:.5px;text-transform:uppercase}.auth-field input{background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:11px 14px;color:var(--text);font-size:14px;outline:none;transition:border-color .2s;width:100%}.auth-field input:focus{border-color:var(--accent)}.auth-field input::placeholder{color:var(--text-faint)}.auth-hint{font-size:11px;color:var(--text-muted)}.auth-btn{padding:12px;border-radius:10px;border:none;font-size:14px;font-weight:600;background:var(--accent);color:#fff;transition:all .2s;width:100%}.auth-btn:hover{background:#6a58f0}.auth-btn:disabled{opacity:.5;cursor:not-allowed}.auth-error{color:var(--red);font-size:12px;background:#f8717114;border:1px solid rgba(248,113,113,.2);border-radius:var(--radius-sm);padding:8px 12px;text-align:center}.sidebar{width:280px;flex-shrink:0;display:flex;flex-direction:column;border-right:1px solid var(--border);background:var(--surface)}.sidebar-header{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.sidebar-user{display:flex;align-items:center;gap:10px;min-width:0}.sidebar-username{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-logout{padding:7px 14px;border-radius:var(--radius-full);border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);font-size:12px;font-weight:500;white-space:nowrap;flex-shrink:0;transition:all .15s}.sidebar-logout:hover{border-color:var(--red);color:var(--red)}.sidebar-lang{padding:8px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.sidebar-lang-label{font-size:11px;color:var(--text-muted)}.sidebar-lang-buttons{display:flex;gap:4px}.sidebar-lang-btn{padding:3px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);font-size:11px;font-weight:500;transition:all .15s}.sidebar-lang-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}.sidebar-search{padding:10px 12px;border-bottom:1px solid var(--border);display:flex;gap:8px;flex-shrink:0}.sidebar-search input{flex:1;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:7px 11px;color:var(--text);font-size:13px;outline:none;min-width:0;transition:border-color .2s}.sidebar-search input:focus{border-color:var(--accent)}.sidebar-search input::placeholder{color:var(--text-faint)}.sidebar-search-btn{padding:7px 12px;border-radius:var(--radius-sm);border:none;font-size:12px;font-weight:600;background:var(--accent);color:#fff;flex-shrink:0}.sidebar-remove-all-row{padding:6px 12px;border-bottom:1px solid var(--border);display:flex;justify-content:flex-end}.sidebar-remove-all-btn{padding:4px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:none;color:var(--text-faint);font-size:11px;transition:all .15s}.sidebar-remove-all-btn:hover{border-color:var(--red);color:var(--red)}.sidebar-convos{flex:1;overflow-y:auto}.sidebar-convos::-webkit-scrollbar{width:3px}.sidebar-convos::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.sidebar-empty{padding:32px 16px;text-align:center;color:var(--text-faint);font-size:13px}.settings-panel{display:flex;flex-direction:column;flex:1;overflow-y:auto}.settings-header{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:12px;font-size:14px;font-weight:600;color:var(--text);justify-content:space-between}.settings-header button{align-items:center;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);font-size:12px}.settings-list{display:flex;flex-direction:column;padding:8px;gap:4px}.settings-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:10px;border:none;background:none;color:var(--text);font-size:14px;cursor:pointer;text-align:left;transition:background .15s;width:100%}.settings-item:hover{background:#ffffff0f}.settings-item.danger{color:var(--red)}.settings-item.danger:hover{background:#f8717114}@media (max-width: 600px){.sidebar{width:100%;border-right:none}.sidebar.hidden{display:none}}.chat-area{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-shrink:0}.chat-header-info{flex:1;min-width:0}.chat-header-name{font-size:14px;font-weight:600}.chat-header-status{font-size:11px;color:var(--text-muted);display:flex;align-items:center;gap:4px}.chat-back-btn{display:none;align-items:center;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);font-size:12px}@media (max-width: 600px){.chat-back-btn{display:flex}}.chat-messages{flex:1;overflow-y:auto;padding:14px 16px;display:flex;flex-direction:column;gap:4px}.chat-messages::-webkit-scrollbar{width:4px}.chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.chat-date-divider{text-align:center;margin:10px 0 6px}.chat-date-divider span{font-size:11px;color:var(--text-faint);background:var(--surface2);padding:3px 10px;border-radius:var(--radius-full)}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--text-faint)}.chat-empty-icon{font-size:36px}.chat-empty p{font-size:13px}.chat-img-preview{padding:7px 12px;border-top:1px solid var(--border);display:flex;align-items:center;gap:10px;background:var(--surface2);flex-shrink:0}.chat-img-preview img{height:44px;border-radius:7px;object-fit:cover}.chat-img-preview span{font-size:12px;color:var(--text-muted)}.chat-img-remove{background:none;border:none;color:var(--red);font-size:18px;margin-left:auto}.chat-input-bar{padding:10px 12px;border-top:1px solid var(--border);display:flex;align-items:flex-end;gap:8px;background:var(--surface);flex-shrink:0}.chat-attach-btn{width:36px;height:36px;border:1px solid var(--border);border-radius:10px;background:var(--surface2);color:var(--text-muted);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.chat-textarea{flex:1;background:var(--surface2);border:1px solid var(--border);border-radius:13px;padding:9px 13px;color:var(--text);font-size:13.5px;outline:none;resize:none;min-height:38px;max-height:110px;line-height:1.5;transition:border-color .2s}.chat-textarea:focus{border-color:var(--accent)}.chat-textarea::placeholder{color:var(--text-faint)}.chat-send-btn{width:38px;height:38px;background:var(--accent);border:none;border-radius:11px;color:#fff;font-size:16px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:opacity .15s}.chat-send-btn:disabled{opacity:.4;cursor:not-allowed}@media (max-width: 600px){.chat-area{display:none}.chat-area.visible{display:flex}}.app{height:100%;display:flex;max-width:900px;margin:0 auto;background:var(--surface);border-left:1px solid var(--border);border-right:1px solid var(--border)}.avatar{background:var(--accent-soft);border:1px solid var(--accent-glow);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;color:var(--accent);flex-shrink:0}.avatar-sm{width:34px;height:34px;font-size:14px}.avatar-md{width:38px;height:38px;font-size:15px}.avatar-msg{width:26px;height:26px;font-size:11px;background:var(--surface3);color:var(--text-muted);border:none}.online-status{font-size:11px;color:var(--green);display:flex;align-items:center;gap:3px}.dot{width:5px;height:5px;border-radius:50%;background:var(--text-faint);flex-shrink:0}.dot.on{background:var(--green)}.dot.typing{background:var(--accent)}.dot.yellow{background:var(--yellow)}.avatar-dot{position:absolute;bottom:1px;right:1px;width:9px;height:9px;border-radius:50%;background:var(--text-faint);border:2px solid var(--surface)}.avatar-dot.on{background:var(--green)}.convo-item{display:flex;align-items:center;gap:10px;padding:11px 14px;cursor:pointer;border-bottom:1px solid var(--border);transition:background .12s;position:relative}.convo-item:hover{background:var(--surface2)}.convo-item.active{background:var(--accent-soft);border-left:2px solid var(--accent)}.convo-avatar{width:38px;height:38px;background:var(--surface3);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;color:var(--text-muted);flex-shrink:0;position:relative}.convo-info{flex:1;min-width:0}.convo-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.convo-preview{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.convo-preview.unread{color:var(--accent);font-weight:500}.convo-delete-btn{opacity:0;background:none;border:none;color:var(--text-faint);font-size:16px;padding:2px 6px;border-radius:6px;transition:all .15s;flex-shrink:0}.convo-item:hover .convo-delete-btn{opacity:1;color:var(--red)}@media (max-width: 600px){.convo-delete-btn{opacity:1;font-size:18px;padding:4px 8px}}.unread-badge{background:var(--red);color:#fff;font-size:10px;font-weight:700;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 5px;flex-shrink:0;animation:popIn .2s ease}@keyframes popIn{0%{transform:scale(0)}to{transform:scale(1)}}.msg-row{display:flex;align-items:flex-end;gap:6px;animation:fadeUp .18s ease}@keyframes fadeUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.msg-row.out{flex-direction:row-reverse}.msg-row.out .msg-avatar{display:none}.msg-bubble-group{display:flex;flex-direction:column;gap:2px;max-width:72%}.msg-row.out .msg-bubble-group{align-items:flex-end}.bubble{padding:8px 13px;border-radius:16px;font-size:13.5px;line-height:1.5;word-break:break-word;position:relative}.bubble.in{background:var(--msg-in);border:1px solid var(--border);color:var(--text);border-bottom-left-radius:4px}.bubble.out{background:var(--msg-out);color:#fff;border-bottom-right-radius:4px}.bubble img{max-width:100%;border-radius:10px;display:block;max-height:200px;object-fit:cover}.bubble-meta{font-size:10px;color:var(--text-faint);padding:0 4px}.msg-row.out .bubble-meta{text-align:right}.bubble-delete-btn{position:absolute;top:-7px;right:-7px;width:17px;height:17px;background:var(--red);border:none;border-radius:50%;color:#fff;font-size:10px;cursor:pointer;display:none;align-items:center;justify-content:center}.bubble:hover .bubble-delete-btn{display:flex}.typing-indicator{font-size:11px;display:flex;align-items:center;gap:6px;padding:4px 0;font-style:italic}.typing-dots{display:flex;gap:3px}.typing-dots span{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:typingBounce 1.2s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,60%,to{opacity:.2;transform:scale(.8)}30%{opacity:1;transform:scale(1)}}.toast{position:fixed;top:30px;left:50%;transform:translate(-50%);background:#1e1e24;color:#e8e8f0;font-size:13px;padding:10px 20px;border-radius:999px;border:1px solid rgba(255,255,255,.1);display:inline-flex;align-items:center;gap:10px;white-space:nowrap;z-index:999;animation:toastIn .2s ease}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:9999;cursor:not-allowed}.loading-spinner{width:32px;height:32px;border:3px solid rgba(255,255,255,.1);border-top-color:#7c6aff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}