:root{--bg-primary: #343541;--bg-secondary: #202123;--bg-tertiary: #40414f;--bg-sent-message: #444654;--text-primary: #ececf1;--text-secondary: #c5c5d2;--text-dim: #8e8ea0;--border-light: rgba(255, 255, 255, .1);--accent-color: #10a37f;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}body{margin:0;padding:0;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;height:100vh;width:100vw;overflow:hidden}#root{height:100%;width:100%;display:flex}.app-container{display:flex;width:100%;height:100%}.main-content{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#565869;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#acacbe}@media(max-width:768px){.app-container.sidebar-open .main-content,.app-container.chat-open .sidebar{display:none}.sidebar{width:100%!important}.back-btn{display:flex!important}}.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;height:100vh;width:100%;color:var(--text-dim)}.app-loading .app-spinner{width:48px;height:48px;border:4px solid var(--bg-tertiary);border-top-color:var(--accent-color);border-radius:50%;animation:app-spin 1s linear infinite}@keyframes app-spin{to{transform:rotate(360deg)}}.upload-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background-color:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:100}.drop-zone{width:100%;max-width:500px;padding:4rem 2rem;border:2px dashed var(--bg-tertiary);border-radius:12px;display:flex;flex-direction:column;align-items:center;text-align:center;transition:all .2s ease;background-color:var(--bg-secondary)}.drop-zone.active{border-color:var(--accent-color);background-color:#10a37f1a}.icon-wrapper{margin-bottom:1.5rem;color:var(--text-primary)}.error-icon{color:#ef4444}h2{margin:0 0 1rem;font-weight:600;color:var(--text-primary)}.description{color:var(--text-secondary);line-height:1.6;margin-bottom:2rem}code{background:var(--bg-tertiary);padding:.2rem .4rem;border-radius:4px;font-family:inherit;font-size:.9em}.upload-btn{display:flex;align-items:center;gap:.5rem;background-color:var(--accent-color);color:#fff;padding:.75rem 1.5rem;border-radius:6px;font-weight:500;cursor:pointer;transition:opacity .2s}.upload-btn:hover{opacity:.9}.upload-btn input{display:none}.error-message{color:#ef4444;margin-bottom:1rem;font-size:.9rem}.privacy-badge{margin-top:2rem;font-size:.8rem;color:var(--text-dim);background:var(--bg-primary);padding:.5rem 1rem;border-radius:99px}.spinner{width:48px;height:48px;border:4px solid var(--bg-tertiary);border-top-color:var(--accent-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.sidebar{width:260px;background-color:var(--bg-secondary);display:flex;flex-direction:column;height:100%;border-right:1px solid var(--border-light);flex-shrink:0}.sidebar-header{padding:.875rem}.search-container{position:relative}.search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-dim)}.search-container input{width:100%;background-color:var(--bg-primary);border:1px solid var(--border-light);border-radius:6px;padding:8px 10px 8px 32px;color:var(--text-primary);font-size:.9rem;outline:none;transition:border-color .2s}.search-container input:focus{border-color:var(--text-secondary)}.chat-list{flex:1;overflow-y:auto;padding:0 .5rem}.chat-item{display:flex;align-items:center;gap:10px;width:100%;padding:10px;border:none;background:none;color:var(--text-primary);cursor:pointer;border-radius:6px;text-align:left;transition:background-color .2s;margin-bottom:2px}.chat-item:hover,.chat-item.active{background-color:var(--bg-tertiary)}.chat-icon{color:var(--text-dim);flex-shrink:0}.chat-info{display:flex;flex-direction:column;overflow:hidden}.chat-title{font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}.chat-date{font-size:.75rem;color:var(--text-dim)}.no-results{padding:1rem;text-align:center;color:var(--text-dim);font-size:.9rem}.sidebar-footer{padding:1rem;border-top:1px solid var(--border-light);background-color:var(--bg-secondary)}.sidebar-controls{display:flex;gap:.5rem}.control-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.6rem;background-color:var(--bg-primary);border:1px solid var(--border-light);border-radius:6px;color:var(--text-primary);cursor:pointer;font-size:.85rem;transition:all .2s}.control-btn:hover{background-color:var(--hover-color);border-color:var(--border-medium)}.user-profile{display:none}.avatar{width:32px;height:32px;background-color:var(--accent-color);color:#fff;border-radius:4px;display:flex;align-items:center;justify-content:center;font-weight:700}.message-row{width:100%;border-bottom:1px solid transparent;padding:2rem}.assistant-row{background-color:var(--bg-sent-message);border-bottom:1px solid rgba(0,0,0,.1)}.user-row{background-color:transparent}.message-container{max-width:800px;margin:0 auto;display:flex;gap:1.5rem}.avatar-column{width:30px;height:30px;border-radius:2px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.user-avatar{background-color:#5436da;color:#fff;border-radius:2px}.bot-avatar{background-color:var(--accent-color);color:#fff;border-radius:2px}.content-column{flex:1;min-width:0;color:var(--text-primary);line-height:1.6;font-size:1rem}.author-name{font-weight:600;margin-bottom:.5rem;font-size:.9rem}.markdown-content p{margin-top:0;margin-bottom:1rem}.markdown-content p:last-child{margin-bottom:0}.markdown-content pre{background-color:#000;padding:1rem;border-radius:6px;overflow-x:auto;margin:1rem 0;color:#e0e0e0}.markdown-content code{font-family:Söhne Mono,Monaco,Andale Mono,Ubuntu Mono,monospace}.markdown-content :not(pre)>code{background-color:#ffffff1a;padding:.2rem .4rem;border-radius:3px;font-size:.9em}.toast{position:absolute;bottom:2rem;left:50%;transform:translate(-50%);background-color:#333;color:#fff;padding:.75rem 1.5rem;border-radius:6px;box-shadow:0 4px 12px #00000026;z-index:1000;font-size:.9rem;animation:toast-fade-in .3s ease-out;pointer-events:none}@keyframes toast-fade-in{0%{opacity:0;transform:translate(-50%,1rem)}to{opacity:1;transform:translate(-50%)}}.chat-window{display:flex;flex-direction:column;height:100%;background-color:var(--bg-primary);position:relative}.chat-header{padding:1rem 2rem;border-bottom:1px solid var(--border-light);display:flex;justify-content:space-between;align-items:center;background-color:var(--bg-primary);color:var(--text-primary);flex-shrink:0}.chat-header h2{margin:0;font-size:1rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.chat-info{display:flex;flex-direction:column;overflow:hidden;margin-right:1rem}.back-btn{background:none;border:none;color:var(--text-primary);cursor:pointer;padding:.5rem;margin-right:.5rem;display:none;align-items:center;justify-content:center;border-radius:4px}.back-btn:hover{background-color:var(--bg-tertiary)}.export-btn{background-color:transparent;border:1px solid var(--border-light);color:var(--text-primary);padding:.5rem 1rem;border-radius:4px;cursor:pointer;font-size:.9rem;transition:all .2s;white-space:nowrap}.export-btn:hover{background-color:var(--bg-secondary);border-color:var(--border-medium)}.chat-header span{font-size:.8rem;color:var(--text-dim)}.messages-scroll{flex:1;overflow-y:auto;scroll-behavior:smooth}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-dim);text-align:center}.empty-state h1{font-size:2rem;margin-bottom:1rem;color:var(--text-primary)}.scroll-spacer{height:50px}