:root{--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-hover:#e2e8f0;--text-primary:#0f172a;--text-secondary:#64748b;--text-muted:#94a3b8;--border-color:#e2e8f0;--accent:#6366f1;--accent-light:#818cf8;--accent-bg:#eef2ff;--accent-text:#fff;--success:#10b981;--error:#ef4444;--shadow-sm:0 1px 2px rgba(0,0,0,.04);--shadow-md:0 4px 12px rgba(0,0,0,.08);--shadow-lg:0 8px 24px rgba(0,0,0,.12);--font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--input-bg:#fff;--input-border:#e2e8f0;--message-user-bg:var(--accent);--message-user-text:#fff;--message-bot-bg:transparent;--message-bot-text:var(--text-primary);--sidebar-width:280px;--border:var(--border-color);--card-bg:var(--bg-secondary)}[data-theme=dark]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-hover:#475569;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--border-color:#334155;--accent:#818cf8;--accent-light:#a5b4fc;--accent-bg:rgba(99,102,241,.15);--shadow-sm:0 1px 2px rgba(0,0,0,.2);--shadow-md:0 4px 12px rgba(0,0,0,.3);--shadow-lg:0 8px 24px rgba(0,0,0,.4);--input-bg:#1e293b;--input-border:#334155;--message-user-bg:var(--accent);--message-user-text:#fff}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .2s,color .2s;line-height:1.6}.app-container,body{background-color:var(--bg-primary)}.app-container{display:flex;flex-direction:column;height:100vh;width:100vw;overflow:hidden}.beta-banner{flex-shrink:0;background:linear-gradient(90deg,var(--accent) 0,var(--accent-light) 100%);color:var(--accent-text);text-align:center;padding:6px 16px;font-size:.8rem;font-weight:500;z-index:60}.app-body{flex:1 1}.app-body,.sidebar{display:flex;min-height:0}.sidebar{width:var(--sidebar-width);flex-shrink:0;background-color:var(--bg-secondary);border-right:1px solid var(--border-color);flex-direction:column;padding:16px;transition:transform .3s cubic-bezier(.4,0,.2,1);z-index:50}.sidebar-header{justify-content:space-between;padding:8px 4px;margin-bottom:24px}.logo,.sidebar-header{display:flex;align-items:center}.logo{font-size:1.5rem;font-weight:700;color:var(--accent);letter-spacing:-.5px;gap:8px}.logo:before{content:"✈️";font-size:1.25rem}.beta-tag{display:inline-block;font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:2px 8px;border-radius:6px;background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);color:var(--accent-text);margin-left:6px;vertical-align:middle;line-height:1.4}.sidebar-profile{display:flex;align-items:center;gap:10px;padding:10px 12px;margin-bottom:16px;background:var(--bg-tertiary);border-radius:var(--radius-md);border:1px solid var(--border-color)}.sidebar-profile-avatar{width:36px;height:36px;border-radius:50%;overflow:hidden;background:var(--bg-hover);display:flex;align-items:center;justify-content:center;flex-shrink:0}.sidebar-avatar-img{width:100%;height:100%;object-fit:cover}.sidebar-avatar-fallback{font-size:1.25rem}.sidebar-profile-name{font-size:.9rem;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.new-chat-btn{background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);color:var(--accent-text);border:none;padding:12px 16px;border-radius:var(--radius-md);font-weight:600;font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin-bottom:20px;transition:all .2s;box-shadow:var(--shadow-sm)}.new-chat-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.history-section-header{padding:8px 12px;margin-bottom:4px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.history-section-title{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;display:flex;align-items:center;gap:8px}.history-icon{opacity:.8;flex-shrink:0}.history-count-badge{font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:10px;background:var(--accent-bg);color:var(--accent)}.history-view-all-btn{margin-left:auto;font-size:.75rem;font-weight:500;padding:4px 10px;border:1px solid var(--border-color);background:transparent;border-radius:8px;color:var(--text-secondary);cursor:pointer;transition:all .15s}.history-view-all-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.history-list{flex:1 1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.history-item-wrapper{display:flex;align-items:center;gap:4px;border-radius:var(--radius-sm);transition:background-color .15s}.history-item-wrapper:hover{background-color:var(--bg-tertiary)}.history-item-wrapper:hover .history-item-delete{opacity:1}.history-item-wrapper.active{background-color:var(--accent-bg)}.history-item{flex:1 1;min-width:0;background:transparent;border:none;border-radius:var(--radius-sm);padding:10px 12px;text-align:left;cursor:pointer;color:var(--text-secondary);font-size:.875rem;transition:all .15s;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;display:flex;align-items:center;gap:10px}.history-item-icon{font-size:.875rem;opacity:.7;flex-shrink:0}.history-item-label{flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis}.history-item:hover{color:var(--text-primary)}.history-item-wrapper.active .history-item{color:var(--accent);font-weight:500}.history-item-delete{flex-shrink:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border:none;background:transparent;border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;opacity:0;transition:opacity .15s,color .15s,background-color .15s}.history-item-delete:hover{color:var(--error);background-color:rgba(239,68,68,.1)}@media (max-width:768px){.history-item-delete{opacity:1}}.history-empty{padding:16px 12px;font-size:.85rem}.history-empty,.history-loading{color:var(--text-muted);text-align:center}.history-loading{padding:12px;font-size:.8rem}.history-load-more-hint{padding:8px 12px;font-size:.75rem;color:var(--text-muted);text-align:center}.all-history-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:200;display:flex;align-items:center;justify-content:center;padding:24px}.all-history-modal{background:var(--bg-primary);border-radius:16px;box-shadow:var(--shadow-lg);max-width:480px;width:100%;max-height:80vh;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--border-color)}.all-history-header{padding:20px 24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:12px;flex-shrink:0}.all-history-header h3{margin:0;font-size:1.25rem;font-weight:600;color:var(--text-primary)}.all-history-count{font-size:.85rem;color:var(--text-secondary)}.all-history-close{margin-left:auto;width:36px;height:36px;border:none;background:var(--bg-tertiary);border-radius:8px;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1;transition:all .15s}.all-history-close:hover{background:var(--bg-hover);color:var(--text-primary)}.all-history-list{flex:1 1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:2px}.theme-toggle{margin-top:auto;padding-top:16px}.logout-section,.theme-toggle{border-top:1px solid var(--border-color)}.logout-section{padding-top:12px;margin-top:12px}.logout-btn{background:var(--bg-tertiary);border:none;color:var(--text-secondary);padding:10px 16px;border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;transition:all .15s}.logout-btn:hover{background-color:rgba(239,68,68,.1);color:var(--error)}.theme-btn{background:var(--bg-tertiary);border:none;color:var(--text-secondary);padding:10px 16px;border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;transition:all .15s}.theme-btn:hover{background-color:var(--bg-hover);color:var(--text-primary)}@media (max-width:768px){.sidebar{position:fixed;left:0;top:0;height:100%;transform:translateX(-100%);box-shadow:var(--shadow-lg)}.sidebar.show{transform:translateX(0)}.sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:40;opacity:0;pointer-events:none;transition:opacity .3s}.sidebar.show+.sidebar-overlay{opacity:1;pointer-events:auto}}.mobile-menu-toggle{display:none}.mobile-history-btn{width:auto;padding:8px 14px;gap:8px;font-size:.9rem;font-weight:500}.mobile-history-btn span{display:none}@media (max-width:768px){.mobile-menu-toggle{display:flex;align-items:center;justify-content:center}.mobile-history-btn span{display:inline}}.main-content{position:relative;background-color:var(--bg-primary);min-width:0;min-height:0}.main-content,.welcome-screen{flex:1 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.message-avatar{background:var(--accent);color:#fff}.message.assistant .message-avatar{background:var(--bg-tertiary);color:var(--text-primary)}.message-avatar-img{width:100%;height:100%;object-fit:cover;border-radius:50%}.message-avatar-fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:1rem;background:var(--accent);color:#fff;border-radius:50%}.message-content{padding:12px 16px;border-radius:var(--radius-lg);font-size:.95rem;max-width:85%;word-wrap:break-word;line-height:1.6}.message.user .message-content{background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);color:var(--message-user-text);border-bottom-right-radius:4px}.message.assistant .message-content{background-color:var(--bg-secondary);color:var(--message-bot-text);border:1px solid var(--border-color);border-bottom-left-radius:4px}.markdown-content{line-height:1.7}.markdown-content p{margin-bottom:.75em}.markdown-content p:last-child{margin-bottom:0}.markdown-content pre{background-color:var(--bg-tertiary);padding:16px;border-radius:var(--radius-sm);overflow-x:auto;margin:12px 0;font-size:.875rem}.markdown-content code{font-family:JetBrains Mono,Fira Code,Menlo,monospace;font-size:.875em;background:var(--bg-tertiary);padding:2px 6px;border-radius:4px}.markdown-content pre code{background:transparent;padding:0}.markdown-content ol,.markdown-content ul{margin:8px 0;padding-left:24px}.markdown-content li{margin-bottom:4px}.markdown-content h1,.markdown-content h2,.markdown-content h3{margin-top:16px;margin-bottom:8px;font-weight:600}.markdown-content a{color:var(--accent);text-decoration:none}.markdown-content a:hover{text-decoration:underline}.input-area-wrapper{position:absolute;bottom:0;left:0;right:0;padding:16px 16px 24px;background:linear-gradient(to top,var(--bg-primary) 70%,transparent 100%);display:flex;justify-content:center}.main-content.has-debug-panel .input-area-wrapper{padding-bottom:420px}@media (max-width:768px){.main-content.has-debug-panel .input-area-wrapper{padding-bottom:380px}}.input-container{width:100%;max-width:800px;background-color:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:8px 8px 8px 20px;display:flex;align-items:flex-end;gap:8px;transition:all .2s}.input-container:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg),var(--shadow-md)}.chat-input{flex:1 1;border:none;background:transparent;padding:10px 0;font-size:.95rem;color:var(--text-primary);outline:none;font-family:inherit;resize:none;overflow-y:auto;min-height:24px;max-height:200px;line-height:1.5}.chat-input::placeholder{color:var(--text-muted)}.send-btn{background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);border:none;cursor:pointer;color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}.send-btn:hover:not(:disabled){transform:scale(1.05);box-shadow:var(--shadow-md)}.send-btn:disabled{opacity:.4;cursor:not-allowed;background:var(--bg-tertiary);color:var(--text-muted)}.focus-tags{display:flex;gap:8px;flex-wrap:wrap;padding:0 4px 8px}.focus-tag{background:var(--accent-bg);color:var(--accent);padding:4px 12px;border-radius:20px;font-size:.8rem;font-weight:500;display:flex;align-items:center;gap:6px;border:1px solid transparent;transition:all .15s}.focus-tag-remove{border:none;background:none;cursor:pointer;color:var(--accent);font-size:14px;font-weight:700;line-height:1;padding:0;opacity:.7;transition:opacity .15s}.char-counter{text-align:right;font-size:.7rem;color:var(--text-muted);padding:4px 12px 0}.char-counter.warning{color:var(--error)}@keyframes shimmer{0%{background-position:-200%}to{background-position:200%}}.thinking-text{font-size:.9rem;font-weight:500;color:var(--text-secondary);background:linear-gradient(90deg,var(--text-secondary) 0,var(--accent) 50%,var(--text-secondary) 100%);background-size:200% auto;background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:shimmer 2s linear infinite}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);padding:20px}.login-box{background:var(--bg-primary);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.login-header{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:24px}.login-logo{color:var(--accent);letter-spacing:-.5px}.login-logo,.login-title{font-size:1.75rem;font-weight:700}.login-title{color:var(--text-primary);margin-bottom:8px;text-align:center}.login-subtitle{color:var(--text-secondary);font-size:.9rem;text-align:center;margin-bottom:32px}.login-error{background:rgba(239,68,68,.1);color:var(--error);padding:12px 16px;border-radius:var(--radius-sm);margin-bottom:20px;font-size:.875rem;border:1px solid rgba(239,68,68,.2)}.login-form{gap:20px}.login-field,.login-form{display:flex;flex-direction:column}.login-field{gap:8px}.login-field label{font-size:.875rem;font-weight:600;color:var(--text-primary)}.login-field input{background:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--radius-sm);padding:12px 16px;font-size:.95rem;color:var(--text-primary);transition:all .2s;font-family:inherit}.login-field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.login-btn{background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);color:var(--accent-text);border:none;padding:14px 24px;border-radius:var(--radius-md);font-weight:600;font-size:1rem;cursor:pointer;transition:all .2s;margin-top:8px}.login-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-md)}.login-btn:disabled{opacity:.6;cursor:not-allowed}.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;background:var(--bg-primary);color:var(--text-primary)}.loading-spinner{font-size:3rem;animation:float 2s ease-in-out infinite;margin-bottom:16px}.app-loading p{color:var(--text-secondary);font-size:1rem}.debug-panel{position:fixed;bottom:0;left:0;right:0;background:var(--bg-secondary);border-top:1px solid var(--border-color);z-index:90;max-height:400px;display:flex;flex-direction:column;box-shadow:0 -4px 12px rgba(0,0,0,.1);transform:translateY(calc(100% - 40px));transition:transform .3s cubic-bezier(.4,0,.2,1)}.debug-panel.expanded{transform:translateY(0)}.debug-panel-toggle{width:100%;background:var(--bg-tertiary);border:none;border-top:1px solid var(--border-color);padding:8px 16px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;color:var(--text-secondary);font-size:.85rem;font-weight:500;transition:all .2s;gap:8px}.debug-panel-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}.debug-panel-content{padding:16px;max-height:300px;overflow-y:auto;border-top:1px solid var(--border-color)}.debug-section{margin-bottom:16px}.debug-label-input{display:block;font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}.debug-input-group{display:flex;gap:8px;align-items:center}.debug-input{flex:1 1;background:var(--input-bg);border:1px solid var(--input-border);padding:8px 12px;color:var(--text-primary);font-family:JetBrains Mono,Fira Code,Menlo,monospace}.debug-btn,.debug-input{border-radius:var(--radius-sm);font-size:.875rem}.debug-btn{padding:8px 16px;font-weight:500;cursor:pointer;border:none;transition:all .2s;white-space:nowrap}.debug-btn-primary{background:linear-gradient(135deg,var(--accent) 0,var(--accent-light) 100%);color:var(--accent-text)}.debug-info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:12px;gap:12px;margin-top:16px;padding-top:16px;border-top:1px solid var(--border-color)}.debug-info-item{display:flex;flex-direction:column;gap:4px}.debug-info-label{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.debug-info-value{font-size:.875rem;color:var(--text-primary);font-family:JetBrains Mono,Fira Code,Menlo,monospace;word-break:break-all}.debug-info-value.connected{color:var(--success)}.debug-info-value.disconnected{color:var(--error)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}