*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #212121;--bg-secondary: #171717;--bg-tertiary: #2f2f2f;--bg-hover: #383838;--bg-input: #2f2f2f;--bg-message-user: #2f2f2f;--bg-message-assistant: transparent;--bg-sidebar: #171717;--bg-modal: #2f2f2f;--bg-code: #1e1e1e;--bg-code-header: #2d2d2d;--text-primary: #ececec;--text-secondary: #b4b4b4;--text-muted: #8e8e8e;--text-placeholder: #8e8ea0;--accent: #10a37f;--accent-hover: #1a7f64;--accent-light: rgba(16, 163, 127, .1);--border: #424242;--border-light: #565656;--success: #10a37f;--error: #ef4444;--warning: #f59e0b;--radius-sm: 6px;--radius: 12px;--radius-lg: 16px;--radius-xl: 24px;--font: "Söhne", "ui-sans-serif", "system-ui", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: "Söhne Mono", Monaco, "Andale Mono", "Ubuntu Mono", monospace;--sidebar-width: 260px;--header-height: 48px;--input-max-width: 768px}body{font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow:hidden;height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100vh;display:flex}button{cursor:pointer;font-family:var(--font);border:none;background:none;color:inherit}input,textarea{font-family:var(--font);border:none;outline:none;background:none;color:inherit}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--border-light)}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);display:flex;flex-direction:column;height:100vh;flex-shrink:0;transition:transform .3s ease,opacity .3s ease;position:relative;z-index:10}.sidebar.collapsed{transform:translate(calc(-1 * var(--sidebar-width)));opacity:0;width:0;overflow:hidden}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-bottom:1px solid rgba(255,255,255,.05)}.sidebar-header-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600}.sidebar-header-actions{display:flex;gap:4px}.sidebar-header-actions button{padding:6px;border-radius:var(--radius-sm);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;transition:background .15s}.sidebar-header-actions button:hover{background:var(--bg-hover);color:var(--text-primary)}.new-chat-btn{display:flex;align-items:center;gap:8px;width:calc(100% - 24px);margin:12px;padding:10px 14px;background:transparent;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:14px;font-weight:500;transition:background .15s}.new-chat-btn:hover{background:var(--bg-hover)}.chat-history{flex:1;overflow-y:auto;padding:0 8px}.chat-history-group-label{font-size:12px;font-weight:600;color:var(--text-muted);padding:12px 12px 6px;text-transform:uppercase;letter-spacing:.5px}.chat-history-item{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s;position:relative;group:true}.chat-history-item:hover{background:var(--bg-hover)}.chat-history-item.active{background:var(--bg-tertiary)}.chat-history-item-title{flex:1;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-secondary)}.chat-history-item.active .chat-history-item-title{color:var(--text-primary)}.chat-history-item-actions{display:none;gap:2px}.chat-history-item:hover .chat-history-item-actions{display:flex}.chat-history-item-actions button{padding:4px;border-radius:4px;color:var(--text-muted);display:flex;align-items:center}.chat-history-item-actions button:hover{color:var(--error);background:#ef44441a}.sidebar-footer{padding:12px;border-top:1px solid rgba(255,255,255,.05)}.sidebar-footer-btn{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-secondary);transition:background .15s}.sidebar-footer-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-footer-btn .avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:#fff}.chat-main{flex:1;display:flex;flex-direction:column;height:100vh;min-width:0;position:relative}.top-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;height:var(--header-height);flex-shrink:0}.top-bar-left{display:flex;align-items:center;gap:8px}.top-bar-title{font-size:16px;font-weight:600}.top-bar-right{display:flex;align-items:center;gap:8px}.icon-btn{padding:8px;border-radius:var(--radius-sm);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.model-selector{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--radius);font-size:14px;font-weight:600;color:var(--text-primary);cursor:pointer;transition:background .15s}.model-selector:hover{background:var(--bg-hover)}.messages-area{flex:1;overflow-y:auto;display:flex;flex-direction:column}.messages-container{max-width:var(--input-max-width);width:100%;margin:0 auto;padding:0 24px;flex:1;display:flex;flex-direction:column}.welcome-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center}.welcome-logo{width:48px;height:48px;margin-bottom:24px;opacity:.9}.welcome-title{font-size:24px;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.welcome-subtitle{font-size:14px;color:var(--text-muted);margin-bottom:32px}.suggestion-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:600px;width:100%}.suggestion-card{padding:16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);text-align:left;cursor:pointer;transition:background .15s,border-color .15s}.suggestion-card:hover{background:var(--bg-hover);border-color:var(--border-light)}.suggestion-card-title{font-size:14px;font-weight:500;margin-bottom:4px;color:var(--text-primary)}.suggestion-card-desc{font-size:12px;color:var(--text-muted)}.message-row{display:flex;gap:16px;padding:24px 0;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:14px}.message-avatar.user{background:var(--accent);color:#fff}.message-avatar.assistant{background:var(--bg-tertiary);border:1px solid var(--border)}.message-content{flex:1;min-width:0}.message-role{font-size:14px;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.message-text{font-size:15px;line-height:1.7;color:var(--text-primary);word-wrap:break-word;overflow-wrap:break-word}.message-text p{margin-bottom:12px}.message-text p:last-child{margin-bottom:0}.message-text ul,.message-text ol{margin:12px 0;padding-left:24px}.message-text li{margin-bottom:4px}.message-text strong{font-weight:600}.message-text em{font-style:italic}.message-text a{color:var(--accent)}.message-text blockquote{border-left:3px solid var(--border);padding-left:16px;margin:12px 0;color:var(--text-secondary)}.message-text h1,.message-text h2,.message-text h3{margin:20px 0 12px;font-weight:600}.message-text h1{font-size:1.4em}.message-text h2{font-size:1.25em}.message-text h3{font-size:1.1em}.code-block{margin:16px 0;border-radius:var(--radius);overflow:hidden;background:var(--bg-code);border:1px solid var(--border)}.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--bg-code-header);font-size:12px;color:var(--text-muted)}.code-block-copy{display:flex;align-items:center;gap:4px;padding:4px 8px;border-radius:var(--radius-sm);font-size:12px;color:var(--text-secondary);transition:background .15s}.code-block-copy:hover{background:var(--bg-hover);color:var(--text-primary)}.code-block pre{padding:16px;overflow-x:auto;font-family:var(--font-mono);font-size:13px;line-height:1.5;color:var(--text-primary);margin:0}.code-block code{font-family:var(--font-mono)}.message-text code:not(.code-block code){background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:.9em}.message-actions{display:flex;gap:4px;margin-top:8px;opacity:0;transition:opacity .15s}.message-row:hover .message-actions{opacity:1}.message-action-btn{padding:6px 8px;border-radius:var(--radius-sm);font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:4px;transition:background .15s,color .15s}.message-action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sources-section{margin-top:16px;padding-top:12px;border-top:1px solid var(--border)}.sources-toggle{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted);cursor:pointer;padding:4px 0}.sources-toggle:hover{color:var(--text-secondary)}.sources-list{margin-top:8px;display:flex;flex-direction:column;gap:6px}.source-item{padding:8px 12px;background:var(--bg-tertiary);border-radius:var(--radius-sm);font-size:12px}.source-item-name{font-weight:500;color:var(--text-primary);margin-bottom:2px}.source-item-snippet{color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-suggestion-card{margin-top:12px;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;gap:12px}.file-suggestion-icon{color:var(--accent);flex-shrink:0}.file-suggestion-info{flex:1;min-width:0}.file-suggestion-name{font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-suggestion-preview{font-size:12px;color:var(--text-muted);margin-top:2px}.file-suggestion-actions{display:flex;gap:6px}.file-suggestion-actions button{padding:6px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:background .15s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}.input-area{padding:0 24px 24px;flex-shrink:0}.input-container{max-width:var(--input-max-width);margin:0 auto;position:relative}.input-wrapper{display:flex;align-items:flex-end;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-lg);padding:12px 16px;transition:border-color .15s}.input-wrapper:focus-within{border-color:var(--border-light)}.input-textarea{flex:1;resize:none;font-size:15px;line-height:1.5;max-height:200px;min-height:24px;padding:0;color:var(--text-primary)}.input-textarea::placeholder{color:var(--text-placeholder)}.input-actions{display:flex;align-items:center;gap:4px;margin-left:8px;flex-shrink:0}.send-btn{width:32px;height:32px;border-radius:50%;background:var(--text-primary);color:var(--bg-primary);display:flex;align-items:center;justify-content:center;transition:opacity .15s}.send-btn:disabled{opacity:.3;cursor:not-allowed}.send-btn:not(:disabled):hover{opacity:.8}.input-hint{text-align:center;font-size:12px;color:var(--text-muted);margin-top:8px}.typing-indicator{display:flex;gap:4px;padding:8px 0}.typing-dot{width:8px;height:8px;border-radius:50%;background:var(--text-muted);animation:typingBounce 1.4s infinite ease-in-out}.typing-dot:nth-child(1){animation-delay:0s}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease}.modal{background:var(--bg-modal);border:1px solid var(--border);border-radius:var(--radius-lg);width:90%;max-width:500px;max-height:80vh;overflow-y:auto;animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-title{font-size:16px;font-weight:600}.modal-body{padding:20px}.modal-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}.upload-dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:32px;text-align:center;cursor:pointer;transition:border-color .2s,background .2s}.upload-dropzone:hover,.upload-dropzone.drag-over{border-color:var(--accent);background:var(--accent-light)}.upload-dropzone-icon{margin-bottom:12px;color:var(--text-muted)}.upload-dropzone-text{font-size:14px;color:var(--text-secondary)}.upload-dropzone-hint{font-size:12px;color:var(--text-muted);margin-top:4px}.upload-file-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;max-height:200px;overflow-y:auto}.upload-file-item{display:flex;align-items:center;gap:8px;padding:10px 12px;background:var(--bg-tertiary);border-radius:var(--radius-sm);font-size:13px}.upload-file-item-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-file-item-size{color:var(--text-muted);font-size:11px}.upload-results{margin-top:12px;display:flex;flex-direction:column;gap:6px}.upload-result-item{padding:8px 12px;border-radius:var(--radius-sm);font-size:12px}.upload-result-item.success{background:#10a37f1a;color:var(--success)}.upload-result-item.error{background:#ef44441a;color:var(--error)}.settings-section{margin-bottom:24px}.settings-section-title{font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px}.settings-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}.settings-row-label{font-size:14px;color:var(--text-primary)}.settings-row-desc{font-size:12px;color:var(--text-muted);margin-top:2px}.toggle-switch{position:relative;width:44px;height:24px;flex-shrink:0}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;right:0;bottom:0;left:0;background:var(--bg-hover);border-radius:24px;transition:.3s}.toggle-slider:before{content:"";position:absolute;height:18px;width:18px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.3s}.toggle-switch input:checked+.toggle-slider{background:var(--accent)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(20px)}.rag-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:500}.rag-badge.enabled{background:var(--accent-light);color:var(--accent)}.rag-badge.disabled{background:var(--bg-tertiary);color:var(--text-muted)}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.sidebar{position:fixed;left:0;top:0;z-index:100;box-shadow:4px 0 24px #0000004d}.sidebar.collapsed{transform:translate(-100%)}.suggestion-grid{grid-template-columns:1fr}.messages-container{padding:0 16px}.input-area{padding:0 16px 16px}}