.file-upload-container{margin-bottom:24px}.drop-zone{background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:2px dashed var(--border-color);border-radius:16px;padding:48px 24px;text-align:center;cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden}.drop-zone:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(99,102,241,.1),transparent);transition:left var(--transition-slow)}.drop-zone:hover:before{left:100%}.drop-zone:hover{border-color:var(--accent-primary);background:#6366f108;transform:translateY(-2px);box-shadow:var(--shadow-glow)}.drop-zone.dragging{border-color:var(--accent-primary);background:#6366f114;transform:scale(1.02)}.drop-zone.uploading{cursor:not-allowed;opacity:.7}.upload-icon{color:var(--accent-primary);margin-bottom:16px;animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.drop-zone h3{font-size:1.5rem;margin-bottom:8px;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.drop-zone p{color:var(--text-secondary);margin-bottom:16px}.file-types{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.file-type-badge{background:var(--bg-tertiary);color:var(--accent-primary);padding:6px 12px;border-radius:8px;font-size:.875rem;font-weight:500;border:1px solid var(--border-color)}.upload-loading{display:flex;flex-direction:column;align-items:center;gap:16px}.upload-loading p{color:var(--text-secondary);margin:0}.upload-status{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:12px;margin-top:16px;font-size:.875rem;font-weight:500}.upload-status.success{background:#10b9811a;border:1px solid var(--success);color:var(--success)}.upload-status.error{background:#ef44441a;border:1px solid var(--error);color:var(--error)}.upload-status button{margin-left:auto;background:none;color:inherit;padding:4px;display:flex;align-items:center;border-radius:4px}.upload-status button:hover{background:#ffffff1a}.document-list{margin-top:32px}.document-list-title{display:flex;align-items:center;gap:8px;font-size:1.125rem;font-weight:600;margin-bottom:16px;color:var(--text-primary)}.document-items{display:flex;flex-direction:column;gap:8px}.document-item{background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:12px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;transition:all var(--transition-normal)}.document-item:hover{border-color:var(--accent-primary);background:#6366f108;transform:translate(4px)}.document-info{display:flex;align-items:center;gap:12px;flex:1;min-width:0}.document-icon{color:var(--accent-primary);flex-shrink:0}.document-details{display:flex;flex-direction:column;gap:2px;min-width:0}.document-name{color:var(--text-primary);font-weight:500;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.document-meta{color:var(--text-muted);font-size:.75rem}.delete-btn{background:#ef44441a;color:var(--error);padding:8px;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal);flex-shrink:0}.delete-btn:hover{background:var(--error);color:#fff;transform:scale(1.1)}.document-list-loading,.document-list-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center;background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:16px;margin-top:32px}.document-list-loading p,.document-list-empty p{color:var(--text-secondary);margin-top:16px;margin-bottom:4px;font-weight:500}.document-list-empty span{color:var(--text-muted);font-size:.875rem}.empty-icon{color:var(--text-muted);opacity:.5}.chat-interface{display:flex;flex-direction:column;height:100%;background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:16px;overflow:hidden}.chat-header{display:flex;align-items:center;gap:12px;padding:20px 24px;background:#6366f108;border-bottom:1px solid var(--glass-border)}.header-icon{color:var(--accent-primary)}.chat-header h2{font-size:1.25rem;font-weight:600;margin:0;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.chat-header p{font-size:.875rem;color:var(--text-muted);margin:0}.chat-messages{flex:1;overflow-y:auto;overflow-x:hidden;padding:24px;display:flex;flex-direction:column;gap:16px;overflow-anchor:none;scroll-behavior:auto;contain:strict;will-change:scroll-position}.chat-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;padding:48px 24px}.empty-bot-icon{color:var(--accent-primary);margin-bottom:16px;opacity:.5;animation:pulse 2s ease-in-out infinite}.chat-empty h3{font-size:1.5rem;margin-bottom:8px;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.chat-empty p{color:var(--text-secondary);margin-bottom:24px}.example-questions{display:flex;flex-direction:column;gap:12px;align-items:center}.example-label{color:var(--text-muted);font-size:.875rem;font-weight:500}.example-chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.example-chips button{background:var(--bg-tertiary);color:var(--text-secondary);padding:8px 16px;border-radius:20px;font-size:.875rem;border:1px solid var(--border-color);transition:all var(--transition-normal);cursor:pointer}.example-chips button:hover{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary);transform:translateY(-2px)}.message{display:flex;gap:12px;align-items:flex-start}.message.user{flex-direction:row-reverse}.message-avatar{width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.message.user .message-avatar{background:var(--accent-gradient);color:#fff}.message.bot .message-avatar{background:var(--bg-tertiary);color:var(--accent-primary);border:1px solid var(--border-color)}.message-content{flex:1;background:var(--bg-secondary);padding:12px 16px;border-radius:12px;border:1px solid var(--glass-border);max-width:80%;box-shadow:var(--shadow-sm)}.message.user .message-content{background:var(--accent-gradient);color:#fff;border:none}.message.user .message-content p{color:#fff;margin:0}.message-sources{display:flex;align-items:center;gap:8px;margin-top:12px;padding-top:12px;border-top:1px solid var(--glass-border);font-size:.75rem;color:var(--text-muted);flex-wrap:wrap}.source-badge{background:var(--bg-secondary);color:var(--accent-primary);padding:4px 8px;border-radius:6px;font-weight:500;border:1px solid var(--border-color)}.message-actions{display:flex;align-items:center;gap:8px;margin-top:12px;padding-top:12px;border-top:1px solid var(--glass-border)}.action-btn{display:flex;align-items:center;gap:4px;padding:6px 10px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-secondary);font-size:.75rem;cursor:pointer;transition:all var(--transition-normal)}.action-btn:hover{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.action-label{font-size:.75rem;font-weight:500;color:var(--accent-primary)}.feedback-buttons{display:flex;gap:8px;margin-left:auto}.action-btn.active-like{background:#22c55e1a;color:#22c55e;border-color:#22c55e}.action-btn.active-like:hover{background:#22c55e;color:#fff}.action-btn.active-dislike{background:#ef44441a;color:#ef4444;border-color:#ef4444}.action-btn.active-dislike:hover{background:#ef4444;color:#fff}.typing-indicator{display:flex;gap:4px;padding:8px 0}.typing-indicator span{width:8px;height:8px;background:var(--accent-primary);border-radius:50%;animation:typing 1.4s infinite}.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);opacity:.7}30%{transform:translateY(-10px);opacity:1}}.chat-input-form{display:flex;gap:12px;padding:20px 24px;background:#6366f105;border-top:1px solid var(--glass-border)}.chat-input-form input{flex:1;margin:0}.chat-input-form button{padding:12px 20px;flex-shrink:0}.chat-input-form button:disabled{opacity:.5;cursor:not-allowed}.chat-input-form button:disabled:hover{transform:none;box-shadow:var(--shadow-sm)}.app{height:100vh;display:flex;flex-direction:column;overflow:hidden}.app-header{background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--glass-border);padding:20px 32px;z-index:100;box-shadow:var(--shadow-sm);flex-shrink:0}.header-content{max-width:1600px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:16px}.logo-icon{color:var(--accent-primary);animation:float 3s ease-in-out infinite}.logo h1{font-size:1.75rem;font-weight:700;margin:0;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo p{font-size:.875rem;color:var(--text-muted);margin:0}.header-badge{display:flex;align-items:center;gap:8px;background:var(--bg-tertiary);padding:8px 16px;border-radius:20px;border:1px solid var(--border-color);font-size:.875rem;color:var(--text-secondary)}.header-badge svg{color:var(--accent-primary)}.app-main{flex:1;display:grid;grid-template-columns:400px 1fr;gap:24px;padding:24px 32px;max-width:1600px;margin:0 auto;width:100%;overflow:hidden}.sidebar{display:flex;flex-direction:column;height:calc(100vh - 140px);overflow-y:auto;contain:strict;overflow-anchor:none}.chat-section{height:calc(100vh - 140px);contain:layout;isolation:isolate}@media (max-width: 1024px){.app-main{grid-template-columns:1fr;gap:24px}.sidebar,.chat-section{height:auto;position:static}.sidebar{order:2}.chat-section{order:1;min-height:600px}}@media (max-width: 768px){.app-header{padding:16px 20px}.header-content{flex-direction:column;gap:12px;align-items:flex-start}.logo h1{font-size:1.5rem}.app-main{padding:16px 20px}}:root{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-tertiary: #f1f5f9;--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--border-color: rgba(99, 102, 241, .2);--success: #10b981;--error: #ef4444;--warning: #f59e0b;--glass-bg: rgba(255, 255, 255, .8);--glass-border: rgba(99, 102, 241, .15);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);--shadow-glow: 0 0 20px rgba(99, 102, 241, .15);--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}*{margin:0;padding:0;box-sizing:border-box}html{overflow:hidden!important;height:100vh;width:100%;position:fixed}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow:hidden!important;height:100vh!important;position:fixed!important;width:100%!important;top:0;left:0}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 20% 50%,rgba(99,102,241,.05) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(139,92,246,.05) 0%,transparent 50%);pointer-events:none;z-index:-1}#root{height:100vh;display:flex;flex-direction:column;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-tertiary)}::-webkit-scrollbar-thumb{background:var(--accent-primary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-secondary)}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.glass-card{background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:16px;box-shadow:var(--shadow-md)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}.fade-in{animation:fadeIn var(--transition-normal) ease-out}.slide-in{animation:slideIn var(--transition-normal) ease-out}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:all var(--transition-normal)}.btn-primary{background:var(--accent-gradient);color:#fff;padding:12px 24px;border-radius:12px;font-weight:600;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.btn-primary:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left var(--transition-slow)}.btn-primary:hover:before{left:100%}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);padding:10px 20px;border-radius:10px;border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background:var(--bg-tertiary);border-color:var(--accent-primary)}input,textarea{font-family:inherit;background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-color);border-radius:12px;padding:12px 16px;outline:none;transition:all var(--transition-normal);width:100%;box-shadow:var(--shadow-sm)}input:focus,textarea:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f11a;background:var(--bg-primary)}input::placeholder,textarea::placeholder{color:var(--text-muted)}.spinner{width:20px;height:20px;border:3px solid var(--bg-tertiary);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.markdown-content{line-height:1.8}.markdown-content h1,.markdown-content h2,.markdown-content h3{margin-top:1.5em;margin-bottom:.5em;font-weight:600}.markdown-content h1{font-size:1.8em;color:var(--text-primary)}.markdown-content h2{font-size:1.5em;color:var(--text-primary)}.markdown-content h3{font-size:1.2em;color:var(--text-secondary)}.markdown-content p{margin-bottom:1em;color:var(--text-secondary)}.markdown-content ul,.markdown-content ol{margin-left:1.5em;margin-bottom:1em}.markdown-content li{margin-bottom:.5em;color:var(--text-secondary)}.markdown-content code{background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-size:.9em;color:var(--accent-primary);font-family:Courier New,monospace;border:1px solid var(--border-color)}.markdown-content pre{background:var(--bg-tertiary);padding:16px;border-radius:8px;overflow-x:auto;margin-bottom:1em;border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.markdown-content pre code{background:none;padding:0;color:var(--text-primary);border:none}.markdown-content strong{color:var(--text-primary);font-weight:600}.markdown-content blockquote{border-left:4px solid var(--accent-primary);padding-left:16px;margin:1em 0;color:var(--text-muted);font-style:italic}