:root{--bg-main: #ffffff;--bg-sidebar: #f0f4fa;--bg-user-bubble: #e9e9eb;--bg-code: #282828;--bg-input: #f4f4f4;--text-primary: #1a1a1a;--text-secondary: #666666;--text-sidebar: #333333;--accent-blue: #2563eb;--accent-green: #10a37f;--accent-red: #ef4444;--btn-send: #2d2d2d;--border-color: #e5e7eb;--sidebar-active-bg: rgba(37, 99, 235, .08);--sidebar-hover-bg: rgba(0, 0, 0, .04);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--radius-full: 9999px;--transition: .2s ease;--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--sidebar-width: 280px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;font-family:var(--font);color:var(--text-primary);background:var(--bg-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit}input,textarea{font-family:inherit;font-size:inherit;border:none;outline:none}.app-layout{display:flex;height:100%;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--bg-sidebar);display:flex;flex-direction:column;border-right:1px solid var(--border-color);transition:transform var(--transition);z-index:10}.sidebar-header{padding:16px;display:flex;flex-direction:column;gap:8px}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:4px 0;margin-bottom:4px}.sidebar-brand-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--accent-blue),#7c3aed);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:700}.sidebar-brand-text{font-size:18px;font-weight:700;color:var(--text-primary)}.sidebar-search{position:relative}.sidebar-search input{width:100%;padding:10px 12px 10px 36px;background:#fff;border-radius:var(--radius-sm);border:1px solid var(--border-color);font-size:13px;color:var(--text-primary);transition:border-color var(--transition),box-shadow var(--transition)}.sidebar-search input:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px #2563eb1a}.sidebar-search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-secondary);font-size:14px;pointer-events:none}.sidebar-actions{display:flex;gap:8px}.sidebar-btn{flex:1;padding:10px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:all var(--transition);display:flex;align-items:center;justify-content:center;gap:6px}.sidebar-btn-new{background:var(--accent-blue);color:#fff}.sidebar-btn-new:hover{background:#1d4ed8;box-shadow:var(--shadow-sm)}.sidebar-btn-settings{background:#fff;color:var(--text-secondary);border:1px solid var(--border-color)}.sidebar-btn-settings:hover{background:var(--bg-sidebar);color:var(--text-primary)}.sidebar-chats{flex:1;overflow-y:auto;padding:8px}.sidebar-chats::-webkit-scrollbar{width:4px}.sidebar-chats::-webkit-scrollbar-thumb{background:#00000026;border-radius:2px}.chat-item{padding:12px 14px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:10px;margin-bottom:2px;position:relative;group:chat-item}.chat-item:hover{background:var(--sidebar-hover-bg)}.chat-item.active{background:var(--sidebar-active-bg)}.chat-item-icon{font-size:16px;flex-shrink:0;opacity:.5}.chat-item.active .chat-item-icon{opacity:1;color:var(--accent-blue)}.chat-item-title{flex:1;font-size:13.5px;font-weight:450;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-sidebar)}.chat-item.active .chat-item-title{color:var(--accent-blue);font-weight:550}.chat-item-delete{opacity:0;color:var(--text-secondary);font-size:16px;padding:4px;border-radius:4px;transition:all var(--transition);flex-shrink:0}.chat-item:hover .chat-item-delete{opacity:1}.chat-item-delete:hover{color:var(--accent-red);background:#ef44441a}.main-area{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}.navbar{height:56px;display:flex;align-items:center;padding:0 20px;border-bottom:1px solid var(--border-color);gap:12px;flex-shrink:0}.navbar-menu-btn{display:none;padding:8px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:20px}.navbar-menu-btn:hover{background:var(--sidebar-hover-bg)}.navbar-title{font-size:15px;font-weight:600;color:var(--text-primary);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model-selector{position:relative}.model-selector-btn{padding:6px 14px;border-radius:var(--radius-full);font-size:12.5px;font-weight:500;color:var(--text-secondary);background:var(--bg-input);transition:all var(--transition);display:flex;align-items:center;gap:6px;white-space:nowrap}.model-selector-btn:hover{background:var(--border-color);color:var(--text-primary)}.model-dropdown{position:absolute;top:calc(100% + 6px);right:0;background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md);min-width:240px;padding:6px;z-index:100;animation:dropdownIn .15s ease}@keyframes dropdownIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.model-option{padding:10px 14px;border-radius:var(--radius-sm);font-size:13.5px;color:var(--text-primary);transition:background var(--transition);display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left}.model-option:hover{background:var(--bg-input)}.model-option.active{background:var(--sidebar-active-bg);color:var(--accent-blue);font-weight:500}.model-option-check{color:var(--accent-blue);font-size:16px}.reasoning-toggle{padding:10px 14px;border-top:1px solid var(--border-color);margin-top:4px;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary);cursor:pointer}.reasoning-toggle input[type=checkbox]{accent-color:var(--accent-blue);width:16px;height:16px}.messages-container{flex:1;overflow-y:auto;padding:24px 0;scroll-behavior:smooth}.messages-container::-webkit-scrollbar{width:6px}.messages-container::-webkit-scrollbar-thumb{background:#0000001f;border-radius:3px}.messages-inner{max-width:768px;margin:0 auto;padding:0 24px}.message{margin-bottom:24px;animation:messageIn .25s ease}@keyframes messageIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-user{display:flex;justify-content:flex-end}.message-user-bubble{background:var(--bg-user-bubble);padding:12px 16px;border-radius:var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);max-width:80%;font-size:14.5px;line-height:1.6;white-space:pre-wrap;word-break:break-word}.message-user-image{display:block;max-width:100%;max-height:300px;border-radius:12px;margin-bottom:8px;object-fit:contain}.message-assistant{padding-right:40px}.message-assistant-content{font-size:14.5px;line-height:1.75}.message-assistant-actions{margin-top:8px;display:flex;gap:4px}.copy-btn{padding:6px 10px;border-radius:var(--radius-sm);font-size:12px;color:var(--text-secondary);transition:all var(--transition);display:flex;align-items:center;gap:4px}.copy-btn:hover{background:var(--bg-input);color:var(--text-primary)}.copy-btn.copied{color:var(--accent-green)}.streaming-cursor:after{content:"▌";animation:blink .8s infinite;color:var(--accent-blue);margin-left:2px}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.markdown-content h1{font-size:1.5em;font-weight:700;margin:16px 0 8px}.markdown-content h2{font-size:1.3em;font-weight:600;margin:14px 0 6px}.markdown-content h3{font-size:1.15em;font-weight:600;margin:12px 0 4px}.markdown-content p{margin:8px 0}.markdown-content ul,.markdown-content ol{padding-left:24px;margin:8px 0}.markdown-content li{margin:4px 0}.markdown-content strong{font-weight:600}.markdown-content em{font-style:italic}.markdown-content a{color:var(--accent-blue);text-decoration:none}.markdown-content a:hover{text-decoration:underline}.markdown-content blockquote{border-left:3px solid var(--border-color);padding-left:16px;color:var(--text-secondary);margin:8px 0}.markdown-content table{border-collapse:collapse;margin:12px 0;width:100%;font-size:13.5px}.markdown-content th,.markdown-content td{border:1px solid var(--border-color);padding:8px 12px;text-align:left}.markdown-content th{background:var(--bg-input);font-weight:600}.code-block-wrapper{position:relative;margin:12px 0;border-radius:var(--radius-sm);overflow:hidden}.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:#383838;font-size:12px;color:#a0a0a0}.code-block-copy{padding:4px 10px;border-radius:4px;font-size:11px;color:#a0a0a0;transition:all var(--transition)}.code-block-copy:hover{background:#ffffff1a;color:#fff}.code-block-copy.copied{color:var(--accent-green)}.markdown-content code:not(pre code){background:#0000000f;padding:2px 6px;border-radius:4px;font-size:.9em;font-family:SF Mono,Fira Code,Consolas,monospace}.markdown-content pre{margin:0!important;padding:0!important;background:transparent!important}.markdown-content pre code{font-size:13px!important;line-height:1.6!important}.input-bar-container{padding:12px 24px 20px;max-width:768px;margin:0 auto;width:100%}.input-bar{display:flex;align-items:flex-end;background:var(--bg-input);border-radius:var(--radius-lg);padding:8px 8px 8px 16px;gap:4px;border:1px solid transparent;transition:border-color var(--transition),box-shadow var(--transition)}.input-bar:focus-within{border-color:var(--border-color);box-shadow:0 0 0 3px #00000008}.input-bar textarea{flex:1;background:transparent;resize:none;min-height:24px;max-height:160px;padding:8px 0;font-size:14.5px;line-height:1.5;color:var(--text-primary);transition:min-height .2s ease}.input-bar:focus-within textarea{min-height:64px}.input-bar textarea::placeholder{color:var(--text-secondary)}.input-btn{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;transition:all var(--transition);flex-shrink:0;font-size:16px;color:var(--text-secondary)}.input-btn:hover{background:#0000000f;color:var(--text-primary)}.input-btn-send{background:var(--btn-send);color:#fff}.input-btn-send:hover{background:#1a1a1a}.input-btn-send:disabled{opacity:.4;cursor:not-allowed}.input-btn-stop{background:var(--accent-red);color:#fff}.input-btn-stop:hover{background:#dc2626}.input-bar.recording{border-color:var(--accent-red);box-shadow:0 0 0 3px #ef44441f}.input-btn-recording{background:var(--accent-red);color:#fff;animation:pulse-recording 1.5s ease infinite}.input-btn-recording:hover{background:#dc2626}@keyframes pulse-recording{0%,to{box-shadow:0 0 #ef444466}50%{box-shadow:0 0 0 8px #ef444400}}.image-preview{padding:8px 16px;display:flex;align-items:center;gap:8px}.image-preview img{width:48px;height:48px;object-fit:cover;border-radius:var(--radius-sm)}.image-preview-remove{padding:4px;border-radius:4px;color:var(--text-secondary);font-size:14px}.image-preview-remove:hover{background:#ef44441a;color:var(--accent-red)}.welcome-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:24px}.welcome-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--accent-blue),#7c3aed);border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:12px;color:#fff}.welcome-title{font-size:28px;font-weight:700;color:var(--text-primary)}.welcome-subtitle{font-size:17px;color:var(--text-secondary);font-weight:400}.login-page{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;background:linear-gradient(135deg,#f0f4fa,#e8edf5,#f3f0ff)}.login-logo{width:80px;height:80px;background:linear-gradient(135deg,var(--accent-blue),#7c3aed);border-radius:22px;display:flex;align-items:center;justify-content:center;font-size:36px;color:#fff;box-shadow:0 8px 24px #2563eb40}.login-content{text-align:center;display:flex;flex-direction:column;gap:8px}.login-title{font-size:32px;font-weight:700}.login-subtitle{font-size:16px;color:var(--text-secondary)}.login-btn{margin-top:16px;padding:14px 40px;background:var(--btn-send);color:#fff;border-radius:var(--radius-full);font-size:15px;font-weight:600;transition:all var(--transition);box-shadow:var(--shadow-sm)}.login-btn:hover{background:#1a1a1a;box-shadow:var(--shadow-md);transform:translateY(-1px)}.scroll-to-bottom{position:absolute;bottom:100px;left:50%;transform:translate(-50%);width:36px;height:36px;border-radius:var(--radius-full);background:#fff;box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:18px;transition:all var(--transition);z-index:5}.scroll-to-bottom:hover{background:var(--bg-input);box-shadow:0 6px 20px #00000026}.settings-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.settings-dialog{background:#fff;border-radius:var(--radius-md);width:90%;max-width:520px;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px #0003;animation:dialogIn .25s ease}@keyframes dialogIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.settings-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-color)}.settings-header h2{font-size:18px;font-weight:600}.settings-close{padding:6px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:20px}.settings-close:hover{background:var(--bg-input);color:var(--text-primary)}.settings-body{padding:24px;display:flex;flex-direction:column;gap:24px}.settings-section h3{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.settings-section p{font-size:12.5px;color:var(--text-secondary);margin-bottom:10px}.settings-facts-list{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}.settings-fact{font-size:13px;color:var(--text-primary);padding:6px 0;border-bottom:1px solid var(--border-color)}.settings-textarea{width:100%;min-height:100px;padding:12px;background:var(--bg-input);border-radius:var(--radius-sm);border:1px solid var(--border-color);font-size:13.5px;line-height:1.5;resize:vertical;color:var(--text-primary);transition:border-color var(--transition)}.settings-textarea:focus{border-color:var(--accent-blue)}.settings-btn{padding:10px 20px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:all var(--transition)}.settings-btn-primary{background:var(--accent-blue);color:#fff}.settings-btn-primary:hover{background:#1d4ed8}.settings-btn-danger{background:transparent;color:var(--accent-red);border:1px solid var(--accent-red)}.settings-btn-danger:hover{background:#ef44440d}.settings-btn-secondary{background:var(--bg-input);color:var(--text-primary)}.settings-btn-secondary:hover{background:var(--border-color)}.settings-actions{display:flex;gap:8px;flex-wrap:wrap}.settings-footer{padding:16px 24px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.settings-user-info{font-size:13px;color:var(--text-secondary)}.settings-logout{padding:8px 16px;border-radius:var(--radius-sm);font-size:13px;color:var(--accent-red);font-weight:500;transition:background var(--transition)}.settings-logout:hover{background:#ef44440f}.loading-screen{height:100%;display:flex;align-items:center;justify-content:center}.loading-spinner{width:32px;height:32px;border:3px solid var(--border-color);border-top-color:var(--accent-blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.mcp-servers-list{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.mcp-server-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--bg-input);border-radius:var(--radius-sm);transition:background var(--transition)}.mcp-server-item:hover{background:var(--border-color)}.mcp-server-info{display:flex;align-items:center;gap:10px;min-width:0;flex:1}.mcp-server-status{width:8px;height:8px;border-radius:50%;background:#d1d5db;flex-shrink:0;transition:background var(--transition)}.mcp-server-status.active{background:var(--accent-green);box-shadow:0 0 6px #10a37f66}.mcp-server-details{display:flex;flex-direction:column;min-width:0}.mcp-server-name{font-size:13px;font-weight:500;color:var(--text-primary)}.mcp-server-url{font-size:11px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mcp-server-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.mcp-server-delete{padding:4px;border-radius:4px;color:var(--text-secondary);font-size:14px;opacity:0;transition:all var(--transition)}.mcp-server-item:hover .mcp-server-delete{opacity:1}.mcp-server-delete:hover{color:var(--accent-red);background:#ef44441a}.mcp-toggle{position:relative;display:inline-block;width:36px;height:20px;cursor:pointer}.mcp-toggle input{opacity:0;width:0;height:0}.mcp-toggle-slider{position:absolute;top:0;right:0;bottom:0;left:0;background:#d1d5db;border-radius:10px;transition:background var(--transition)}.mcp-toggle-slider:before{content:"";position:absolute;width:16px;height:16px;left:2px;bottom:2px;background:#fff;border-radius:50%;transition:transform var(--transition);box-shadow:0 1px 3px #00000026}.mcp-toggle input:checked+.mcp-toggle-slider{background:var(--accent-green)}.mcp-toggle input:checked+.mcp-toggle-slider:before{transform:translate(16px)}.mcp-add-form{display:flex;flex-direction:column;gap:8px}.mcp-input{width:100%;padding:10px 12px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:13px;color:var(--text-primary);transition:border-color var(--transition)}.mcp-input:focus{border-color:var(--accent-blue);outline:none}.mcp-input::placeholder{color:var(--text-secondary)}.tool-call-indicator{display:flex;align-items:center;gap:8px;padding:10px 14px;margin-bottom:16px;background:#2563eb0f;border-radius:var(--radius-sm);font-size:13px;color:var(--accent-blue);animation:messageIn .25s ease}@media(max-width:768px){.sidebar{position:fixed;left:0;top:0;bottom:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000004d;z-index:9}.navbar-menu-btn{display:flex}.messages-inner{padding:0 16px}.input-bar-container{padding:8px 16px 12px}}