@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg: #f4f6f9;--bg-panel: #ffffff;--bg-muted: #f0f2f5;--bg-hover: #eef0f3;--accent: #4f6ef7;--accent-hover: #3b5bdb;--accent-dim: #eef1fe;--accent-rgb: 79, 110, 247;--text-1: #111827;--text-2: #4b5563;--text-3: #9ca3af;--border: #e5e7eb;--border-hover: #d1d5db;--border-focus: #a5b4fc;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--radius-xs: 3px;--radius-sm: 5px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-pill: 999px;--shadow-xs: 0 1px 2px rgba(0,0,0,.04);--shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);--shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.05);--shadow-inset: inset 0 1px 2px rgba(0,0,0,.06);--ease: .18s ease;--ease-out: .22s cubic-bezier(.16,1,.3,1);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-feature-settings:"cv02","cv03","cv04","cv11";line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-1);background:var(--bg);--sidebar-w: 252px;--navbar-h: 58px}[data-theme=dark]{--bg: #0d1117;--bg-panel: #161b22;--bg-muted: #1c2128;--bg-hover: #21262d;--accent: #5b76f8;--accent-hover: #4f6ef7;--accent-dim: rgba(79, 110, 247, .14);--accent-rgb: 91, 118, 248;--text-1: #e6edf3;--text-2: #8b949e;--text-3: #4d5562;--border: #30363d;--border-hover: #444c56;--border-focus: #6e7ef5;--success: #3fb950;--error: #f85149;--warning: #e3b341;--shadow-xs: 0 1px 2px rgba(0,0,0,.4);--shadow-sm: 0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);--shadow-md: 0 4px 8px rgba(0,0,0,.4), 0 2px 4px rgba(0,0,0,.3);--shadow-lg: 0 10px 20px rgba(0,0,0,.4), 0 4px 8px rgba(0,0,0,.3)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;width:100%;overflow:hidden}body{display:flex;background:var(--bg)}a{color:inherit;text-decoration:none}button,input,textarea,select{font-family:inherit}button{cursor:pointer}button,input,textarea,a,[role=button]{transition:all var(--ease)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--radius-pill)}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}::selection{background:rgba(var(--accent-rgb),.2);color:var(--text-1)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}@keyframes dot-bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-5px)}}@keyframes slide-in-left{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}.spin{animation:spin 1s linear infinite}.fade-in{animation:fade-in .25s var(--ease-out) both}.app-container{display:flex;flex-direction:column;height:100vh;width:100vw;background:var(--bg);overflow:hidden}.top-navbar{display:flex;align-items:center;justify-content:space-between;height:var(--navbar-h);padding:0 20px;background:var(--bg-panel);border-bottom:1px solid var(--border);flex-shrink:0;z-index:100;gap:16px}.nav-brand{display:flex;align-items:center;gap:9px;color:var(--text-1);font-size:15px;font-weight:700;letter-spacing:-.3px;flex-shrink:0}.nav-brand-icon{width:28px;height:28px;background:var(--accent);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:800;letter-spacing:-.5px}.nav-links{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}.nav-link{display:flex;align-items:center;gap:6px;background:none;border:none;color:var(--text-2);font-size:13.5px;font-weight:500;padding:5px 12px;border-radius:var(--radius-sm);transition:all var(--ease)}.nav-link:hover{color:var(--text-1);background:var(--bg-muted)}.nav-link.active{color:var(--accent);background:var(--accent-dim);font-weight:600}.nav-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.nav-user{display:flex;align-items:center;gap:8px}.nav-avatar{width:29px;height:29px;border-radius:var(--radius-sm);background:var(--accent-dim);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;border:1.5px solid rgba(var(--accent-rgb),.2)}.nav-username{font-size:13px;font-weight:500;color:var(--text-2)}.nav-role-badge{font-size:11px;font-weight:600;padding:1px 7px;border-radius:var(--radius-pill);background:var(--bg-muted);color:var(--text-3);border:1px solid var(--border)}.nav-divider{width:1px;height:18px;background:var(--border);margin:0 4px}.nav-icon-btn{background:none;border:none;color:var(--text-2);width:30px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);transition:all var(--ease)}.nav-icon-btn:hover{background:var(--bg-muted);color:var(--text-1)}.logout-btn{display:flex;align-items:center;gap:5px;background:none;border:none;color:var(--text-2);font-size:13px;font-weight:500;padding:5px 10px;border-radius:var(--radius-sm);transition:all var(--ease)}.logout-btn:hover{background:#fef2f2;color:var(--error)}[data-theme=dark] .logout-btn:hover{background:#f851491a}.content-wrapper{display:flex;flex:1;overflow:hidden}.left-panel{width:var(--sidebar-w);background:var(--bg-panel);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden}.panel-header{padding:14px 12px 12px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:10px}.new-chat-btn{width:100%;padding:8px 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rgba(var(--accent-rgb),.08)}.history-list{flex:1;overflow-y:auto;padding:8px}.history-section{margin-bottom:4px}.history-date{font-size:10.5px;font-weight:700;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;padding:8px 6px 4px}.history-item-wrap{display:flex;align-items:center;gap:2px;border-radius:var(--radius-sm);margin-bottom:1px}.history-item-wrap:hover .history-item-actions{opacity:1}.history-item{display:flex;align-items:center;gap:8px;flex:1;padding:7px 8px;border-radius:var(--radius-sm);cursor:pointer;color:var(--text-2);font-size:13px;border:none;background:transparent;width:100%;text-align:left;transition:all var(--ease);min-width:0}.history-item:hover{background:var(--bg-muted);color:var(--text-1)}.history-item.active{background:var(--accent-dim);color:var(--accent);font-weight:500}.history-item 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16px;text-align:center;color:var(--text-3);font-size:13px;line-height:1.6}.chat-window{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.chat-window-header{height:52px;border-bottom:1px solid var(--border);background:var(--bg-panel);display:flex;align-items:center;padding:0 24px;gap:10px;font-size:14px;font-weight:600;color:var(--text-1);flex-shrink:0}.chat-window-header-icon{color:var(--accent);opacity:.8}.messages-area{flex:1;overflow-y:auto;scroll-behavior:smooth}.messages-container{max-width:780px;margin:0 auto;padding:8px 0 16px;display:flex;flex-direction:column}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;padding:48px 32px;animation:fade-in .3s var(--ease-out)}.empty-state-icon{width:52px;height:52px;background:var(--accent-dim);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:var(--accent);margin-bottom:20px}.empty-state h1{font-size:22px;font-weight:700;color:var(--text-1);margin-bottom:8px;letter-spacing:-.3px}.empty-state p{font-size:14px;color:var(--text-3);max-width:340px;line-height:1.6}.empty-suggestions{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px;justify-content:center;max-width:500px}.empty-suggestion-chip{padding:7px 14px;border:1px solid var(--border);border-radius:var(--radius-pill);font-size:13px;color:var(--text-2);background:var(--bg-panel);cursor:pointer;transition:all var(--ease)}.empty-suggestion-chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.message-row{display:flex;padding:16px 24px;gap:14px;animation:fade-in .2s var(--ease-out) both;width:100%}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.message-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px;margin-top:4px}.message-row.user .message-avatar{display:none}.message-avatar.assistant{background:var(--accent);color:#fff;box-shadow:0 3px 8px #00000014}.message-body{max-width:80%;display:flex;flex-direction:column}.message-row.user .message-body{align-items:flex-end}.message-row.assistant .message-body{align-items:flex-start}.message-role{display:none}.message-text{font-size:14.5px;line-height:1.6;white-space:pre-wrap;word-break:break-word;padding:14px 18px;border-radius:20px}.message-row.assistant .message-text{background:var(--bg-panel);color:var(--text-1);border:1px solid var(--border);border-bottom-left-radius:4px}.message-row.user .message-text{background:var(--text-1);color:var(--bg);border-bottom-right-radius:4px}[data-theme=dark] .message-row.user .message-text{background:var(--accent);color:#fff}.streaming-cursor{display:inline-block;animation:blink 1s step-end 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infinite}.typing-dot:nth-child(1){animation-delay:0s}.typing-dot:nth-child(2){animation-delay:.18s}.typing-dot:nth-child(3){animation-delay:.36s}.sources-container{margin-top:14px}.sources-label{display:flex;align-items:center;gap:5px;font-size:11.5px;font-weight:700;color:var(--text-3);text-transform:uppercase;letter-spacing:.07em;margin-bottom:8px}.sources-scroll{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px}.source-card{min-width:220px;max-width:260px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;flex-shrink:0;transition:border-color var(--ease)}.source-card:hover{border-color:var(--border-hover)}.source-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:7px}.source-card-file{display:flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--text-2);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.source-card-ref-count{font-size:11px;background:var(--accent-dim);color:var(--accent);padding:1px 6px;border-radius:var(--radius-pill);font-weight:600;flex-shrink:0}.source-card-snippet{font-size:12px;color:var(--text-2);line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.source-card-footer{margin-top:7px;border-top:1px solid var(--border);padding-top:6px}.source-card-pages{font-size:11px;color:var(--text-3);font-weight:500}.input-area{padding:16px 24px 20px;background:var(--bg-panel);border-top:1px solid var(--border);flex-shrink:0}.attach-error{display:flex;align-items:center;gap:7px;padding:8px 12px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-sm);font-size:12.5px;color:var(--error);margin-bottom:10px;animation:fade-in .2s var(--ease-out)}[data-theme=dark] .attach-error{background:#f8514914;border-color:#f851494d}.input-box{max-width:760px;margin:0 auto;background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-md);transition:border-color var(--ease),box-shadow var(--ease);overflow:hidden}.input-box:focus-within{border-color:var(--border-focus);box-shadow:0 0 0 3px rgba(var(--accent-rgb),.09)}.attached-files{display:flex;flex-wrap:wrap;gap:6px;padding:10px 12px 0}.attached-file-chip{display:flex;align-items:center;padding:4px 8px 4px 9px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:12px;color:var(--text-2);gap:5px}.chip-name{font-weight:500;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chip-size{color:var(--text-3);font-size:11px}.chip-remove{background:none;border:none;color:var(--text-3);padding:1px;display:flex;align-items:center;border-radius:2px;margin-left:2px}.chip-remove:hover{color:var(--error)}.input-box textarea{display:block;width:100%;min-height:52px;max-height:180px;padding:14px 50px 14px 16px;border:none;background:transparent;color:var(--text-1);font-size:14px;line-height:1.6;resize:none;outline:none}.input-box textarea::placeholder{color:var(--text-3)}.input-footer{display:flex;align-items:center;justify-content:space-between;padding:0 10px 8px 14px}.input-hint{font-size:11.5px;color:var(--text-3)}.input-actions{display:flex;gap:4px}.attach-btn{width:30px;height:30px;border:none;background:transparent;color:var(--text-3);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--ease)}.attach-btn:hover{background:var(--bg-muted);color:var(--text-1)}.send-btn{width:30px;height:30px;border:none;background:var(--accent);color:#fff;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--ease);box-shadow:0 1px 3px rgba(var(--accent-rgb),.3)}.send-btn:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-.5px)}.send-btn:active:not(:disabled){transform:translateY(0)}.send-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.login-root{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg-muted);background-image:radial-gradient(circle at top right,rgba(var(--accent-rgb),.05),transparent 400px),radial-gradient(circle at bottom left,rgba(var(--accent-rgb),.03),transparent 300px);padding:24px;overflow:hidden}.login-box{width:100%;max-width:420px;background:var(--bg-panel);padding:44px 40px;border-radius:var(--radius-xl);border:1px solid var(--border);box-shadow:var(--shadow-lg);animation:fade-in .4s var(--ease-out)}.login-header{margin-bottom:36px;display:flex;flex-direction:column;align-items:center;text-align:center}.login-header-logo{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:24px}.login-header-logo-icon{width:38px;height:38px;background:var(--accent);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;letter-spacing:-.5px;box-shadow:0 4px 12px rgba(var(--accent-rgb),.25)}.login-header-logo-name{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:-.3px}.login-header h1{font-size:26px;font-weight:700;color:var(--text-1);letter-spacing:-.6px;margin-bottom:8px}.login-header p{font-size:14.5px;color:var(--text-3);line-height:1.5}.login-form{display:flex;flex-direction:column;gap:4px}.form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.form-label{font-size:13px;font-weight:600;color:var(--text-2)}.form-input-wrap{position:relative}.form-input-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-3);pointer-events:none}.form-input{width:100%;padding:10px 12px 10px 38px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:14px;background:var(--bg);color:var(--text-1);outline:none;transition:border-color var(--ease),box-shadow var(--ease)}.form-input::placeholder{color:var(--text-3)}.form-input:hover{border-color:var(--border-hover)}.form-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px rgba(var(--accent-rgb),.1)}.form-input-right{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text-3);padding:3px;display:flex;align-items:center;border-radius:3px}.form-input-right:hover{color:var(--text-1)}.login-error{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-sm);font-size:13px;color:var(--error);margin-bottom:12px;animation:fade-in .2s var(--ease-out)}[data-theme=dark] .login-error{background:#f8514914;border-color:#f851494d}.btn-primary{width:100%;padding:11px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all var(--ease);box-shadow:0 1px 3px rgba(var(--accent-rgb),.35);margin-top:6px;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 3px 8px rgba(var(--accent-rgb),.4);transform:translateY(-.5px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.login-hint{margin-top:24px;padding:12px 14px;background:var(--bg-muted);border:1px solid var(--border);border-radius:var(--radius-sm)}.login-hint-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-3);margin-bottom:8px}.login-hint-row{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-2);padding:3px 0}.login-hint-row code{font-family:SFMono-Regular,Consolas,monospace;font-size:11.5px;background:var(--bg-panel);border:1px solid var(--border);border-radius:3px;padding:1px 6px;color:var(--accent)}.dashboard-view{flex:1;padding:32px;overflow-y:auto;background:var(--bg)}.dashboard-container{max-width:820px;margin:0 auto;animation:fade-in .25s var(--ease-out)}.dashboard-header{margin-bottom:28px}.dashboard-title{font-size:22px;font-weight:700;color:var(--text-1);letter-spacing:-.3px;margin-bottom:6px}.dashboard-subtitle{font-size:14px;color:var(--text-3);line-height:1.5}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:52px 32px;text-align:center;cursor:pointer;transition:all var(--ease);background:var(--bg-panel);position:relative}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--accent);background:var(--accent-dim)}.upload-zone.drag-over{transform:scale(1.01)}.upload-zone-icon{color:var(--text-3);margin-bottom:14px;transition:color var(--ease),transform var(--ease)}.upload-zone:hover .upload-zone-icon,.upload-zone.drag-over .upload-zone-icon{color:var(--accent);transform:translateY(-2px)}.upload-zone-text{font-size:14px;font-weight:500;color:var(--text-2);margin-bottom:6px}.upload-zone-text span{color:var(--accent);font-weight:600}.upload-zone-hint{font-size:12.5px;color:var(--text-3)}.upload-file-list{margin-top:20px;display:flex;flex-direction:column;gap:6px}.upload-file-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-md);transition:all var(--ease);animation:slide-in-left .2s var(--ease-out) both}.upload-file-item.done{border-color:#a7f3d0;background:#f0fdf4}.upload-file-item.error{border-color:#fecaca;background:#fef2f2}[data-theme=dark] .upload-file-item.done{border-color:#34d39940;background:#34d3990f}[data-theme=dark] .upload-file-item.error{border-color:#f8514940;background:#f851490f}.file-status-icon{flex-shrink:0}.status-done{color:var(--success)}.status-error{color:var(--error)}.status-uploading{color:var(--accent)}.status-pending{color:var(--text-3)}.upload-file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.upload-file-name{font-size:13.5px;font-weight:500;color:var(--text-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.upload-file-size{font-size:12px;color:var(--text-3)}.upload-file-error{font-size:12px;color:var(--error)}.upload-file-remove{background:none;border:none;color:var(--text-3);padding:4px;border-radius:var(--radius-xs);display:flex;align-items:center;transition:all var(--ease)}.upload-file-remove:hover{color:var(--error);background:#fef2f2}[data-theme=dark] .upload-file-remove:hover{background:#f851491a}.upload-submit-btn{width:100%;padding:12px;margin-top:16px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all var(--ease);box-shadow:0 1px 3px rgba(var(--accent-rgb),.3)}.upload-submit-btn:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 3px 8px rgba(var(--accent-rgb),.4);transform:translateY(-.5px)}.upload-submit-btn:active:not(:disabled){transform:translateY(0)}.upload-submit-btn:disabled{opacity:.55;cursor:not-allowed}.dashboard-info-strip{margin-top:28px;padding:16px 20px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-md);display:flex;flex-direction:column;gap:10px}.dashboard-info-item{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-3);line-height:1.5}.dashboard-info-item svg{flex-shrink:0;color:var(--accent);opacity:.7;margin-top:1px}.chat-input-hint{max-width:760px;margin:0 auto;font-size:11.5px;color:var(--text-3);text-align:center;padding-top:8px;display:none}button:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}input:focus-visible,textarea:focus-visible{outline:none}