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767px){.sidebar{position:fixed;transform:translate(-100%);width:100%;max-width:100vw;height:100vh;height:-webkit-fill-available;touch-action:none;overflow-y:auto;overflow-x:hidden;background-color:#1e1e1e;left:0;right:0;top:0;z-index:1000}.sidebar.expanded{transform:translate(0)}.sidebar.collapsed{transform:translate(-100%)}.sidebar-toggle-fixed{display:block;z-index:1001}.sidebar-content{width:100%;height:100%;height:-webkit-fill-available;display:flex;flex-direction:column;overflow-y:auto;position:relative}.chat-container{margin-bottom:0}.chat-scrollable{padding-bottom:0;margin-bottom:0}.new-chat-button{width:auto;padding:12px 20px;margin:8px auto}.migration-prompt{position:fixed;bottom:0;left:0;right:0;width:100%;max-width:100vw;background-color:var(--bg-color);padding:16px;border-top:1px solid var(--border-color);z-index:1001;display:flex;flex-direction:column;gap:12px;box-shadow:0 -2px 10px #0000001a;box-sizing:border-box}.sidebar-footer{padding:16px 20px;border-top:1px solid 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1rem;box-sizing:border-box}.message{font-size:15px;line-height:1.6;white-space:pre-wrap;word-break:break-word;border-radius:12px;max-width:85%;padding:14px 16px;box-sizing:border-box;font-family:Figtree,sans-serif;margin:4px 0;box-shadow:0 1px 2px #0000001a;letter-spacing:.2px}.user-message{align-self:flex-end;background-color:#3a3a3a;color:#fff;border-bottom-right-radius:4px}.bot-message{align-self:flex-start;background-color:#2a2a2a;color:#fff;border-bottom-left-radius:4px;width:auto}.chat-input-tools{margin-top:.5rem;display:flex;align-items:center;z-index:10}.document-button{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:transparent;color:#888;border:none;cursor:pointer;transition:all .2s ease;position:relative}.document-button:hover{color:#fff;background-color:#ffffff1a}.document-button.active{color:#4caf50}.document-count{position:absolute;top:-5px;right:-5px;background-color:#4caf50;color:#fff;font-size:10px;font-weight:700;height:16px;min-width:16px;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:0 4px}.chat-input{flex:1;width:100%;padding:12px 56px;font-size:16px;line-height:1.5;border:1px solid #444;border-radius:12px;outline:none;background-color:#2a2a2a;color:#fff;resize:none;min-height:3rem;max-height:160px;overflow-y:auto;font-family:Figtree,sans-serif;transition:border-color .2s ease,background-color .2s ease;margin:8px 0}.chat-input:focus{border-color:#666;background-color:#333;box-shadow:0 0 0 2px #ffffff1a}.chat-input::placeholder{color:#888;font-family:Figtree,sans-serif;font-size:16px}.chat-textarea{width:100%;resize:none;overflow:hidden;min-height:2.5rem;max-height:10rem;padding:.75rem 3rem .75rem 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.2s,box-shadow .2s}.document-card:hover{transform:translateY(-5px);box-shadow:0 5px 15px #0000004d}.document-card h3{margin:0 0 10px;color:var(--accent-color)}.document-card p{margin:0 0 15px;color:var(--text-color)}.document-meta{display:flex;flex-direction:column;gap:5px;font-size:.9rem;color:#888}.upload-container{max-width:600px;margin:80px auto 0;padding:20px}.upload-container h2{color:var(--text-color);margin-bottom:20px;text-align:center}.upload-form{background-color:var(--secondary-color);border:1px solid var(--border-color);border-radius:8px;padding:20px;box-shadow:0 2px 4px #0000001a}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-color);font-weight:500}.form-group input[type=text],.form-group textarea{width:100%;padding:10px;border:1px solid var(--border-color);border-radius:4px;background-color:var(--bg-color);color:var(--text-color);font-size:14px}.form-group input[type=file]{width:100%;padding:10px;border:2px dashed var(--border-color);border-radius:4px;background-color:var(--bg-color);color:var(--text-color);cursor:pointer}.form-group input[type=file]:hover{border-color:var(--accent-color)}.error-message{color:#dc3545;background-color:#dc35451a;padding:10px;border-radius:4px;margin-bottom:15px;font-size:14px}.success-message{color:#28a745;background-color:#28a7451a;padding:10px;border-radius:4px;margin-bottom:15px;font-size:14px}.submit-button{width:100%;padding:12px;background-color:var(--accent-color);color:#fff;border:none;border-radius:4px;font-size:16px;cursor:pointer;transition:background-color .2s}.submit-button:hover{background-color:#5a9ed9}.submit-button:disabled{background-color:#ccc;cursor:not-allowed}.error{color:#f44;margin:10px 0;padding:10px;background-color:#ff44441a;border-radius:4px}.success{color:#00c851;margin:10px 0;padding:10px;background-color:#00c8511a;border-radius:4px}.loading{text-align:center;padding:20px;color:var(--text-color)}.nav-bar{height:60px;border-bottom:1px solid var(--border-color);display:flex;padding:0 50px;align-items:center;position:fixed;top:0;right:0;z-index:1000;gap:10px;transition:left .3s ease}.sidebar-collapsed .nav-bar{left:60px}.nav-bar{left:240px}.back-button{background-color:var(--accent-color);color:var(--text-color);border:none;padding:8px 16px;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .2s}.back-button:hover{background-color:#5a9ed9}.documents-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding:0 1rem}.documents-header h2{margin:0;color:#333;font-size:1.8rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:var(--secondary-color);padding:2rem;border-radius:8px;width:90%;max-width:600px;max-height:90vh;overflow-y:auto;position:relative}.modal-buttons{display:flex;gap:1rem;justify-content:flex-end;margin-top:1.5rem}.cancel-button{padding:8px 16px;background-color:#6c757d;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .2s}.cancel-button:hover{background-color:#5a6268}html,body,#root{margin:0;padding:0;height:100%;width:100%;overflow:hidden;position:fixed;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;box-sizing:border-box}.app-container{display:flex;flex-direction:row;height:100%;width:100%;overflow:hidden;position:fixed;background-color:var(--bg-color)}.app-layout{display:flex;flex-direction:row;height:100%;width:100%;overflow:hidden;position:fixed}.auth-container{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;background-color:var(--bg-color)}.auth-content{background-color:#2c2c2c;border-radius:12px;padding:2rem;width:100%;max-width:400px;box-shadow:0 4px 20px #0003;text-align:center}.auth-content h2{color:#fff;margin-bottom:1.5rem;font-size:1.5rem}.auth-button{display:flex;justify-content:center;margin-top:1rem}.main-content{flex-grow:1;padding:20px;display:flex;justify-content:center;align-items:stretch;overflow:hidden;background-color:var(--bg-color);width:calc(100% - 260px);margin-left:260px;flex-direction:column;transition:margin-left .3s ease,width .3s ease;height:100%;box-sizing:border-box;position:relative}.main-content.sidebar-collapsed{margin-left:0;width:100%}.chat-wrapper{flex:1;display:flex;flex-direction:column;align-items:center;padding:1rem;overflow-y:auto;-webkit-overflow-scrolling:touch;max-width:768px;margin:0 auto;width:100%;box-sizing:border-box;position:relative}@media (max-width: 768px){.app-container{flex-direction:column;width:100%;position:fixed;height:100%;overflow:hidden}.app-layout{width:100%;position:fixed;height:100%;overflow:hidden}.main-content{width:100%;margin-left:0;position:relative;height:100%;overflow:hidden;box-sizing:border-box;display:flex;flex-direction:column;z-index:1}.chat-wrapper{width:100%;margin:0;height:100%;position:relative;flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}.auth-container{padding:1rem;width:100%;box-sizing:border-box}.auth-content{padding:1.5rem;width:100%;box-sizing:border-box}}.chat-container{display:flex;flex-direction:column;height:100vh;height:-webkit-fill-available;background-color:#1e1e1e;color:#e1e6f2;position:relative;box-sizing:border-box}.chat-error,.chat-loading{display:flex;justify-content:center;align-items:center;height:100vh;font-size:16px;color:#e1e6f2;padding:16px;text-align:center}.empty-chat-message{display:flex;justify-content:center;align-items:center;color:#888;font-size:16px;padding:20px;text-align:center;margin:auto 0;height:50vh}.messages-container{flex:1;overflow-y:auto;padding:50px 20px;scrollbar-width:thin;scrollbar-color:#666 #1e1e1e;-webkit-overflow-scrolling:touch;box-sizing:border-box}.messages-container::-webkit-scrollbar{width:8px;position:fixed;right:0}.messages-container::-webkit-scrollbar-track{background:#1e1e1e}.messages-container::-webkit-scrollbar-thumb{background-color:#666;border-radius:4px}.messages-container::-webkit-scrollbar-thumb:hover{background-color:#888}.skeleton-message{height:60px;background:linear-gradient(90deg,#eee 25%,#ddd,#eee 75%);background-size:400% 100%;animation:skeleton-loading 1.2s infinite;margin:10px;border-radius:8px}@keyframes skeleton-loading{0%{background-position:100% 50%}to{background-position:0 50%}}@media (min-width: 768px){.chat-wrapper.with-sidebar{width:calc(100% - 260px)}}@media (max-width: 767px){.chat-container{height:100vh;height:-webkit-fill-available}.messages-container{padding-bottom:120px}.chat-error,.chat-loading{padding-top:60px}.chat-wrapper{height:100%;min-height:100%;position:fixed;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;overflow:hidden;-webkit-transform:translateZ(0);transform:translateZ(0)}.chat-messages{height:calc(100% - 60px);padding-bottom:calc(60px + env(safe-area-inset-bottom));-webkit-overflow-scrolling:touch;overflow-y:auto}}@media (prefers-contrast: more){.empty-chat-message{color:#fff}.chat-error{color:#ff6b6b}}.fade-in{opacity:0;animation:fadeIn .8s ease forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.thinking-indicator{display:flex;align-items:center;min-height:32px;gap:4px;background:#2a2a2a;border-radius:8px;padding:8px 16px;margin:8px 0}.thinking-dot{width:8px;height:8px;background:#bbb;border-radius:50%;margin:0 2px;opacity:.7;animation:thinkingBlink 1.2s infinite both}.thinking-dot:nth-child(2){animation-delay:.2s}.thinking-dot:nth-child(3){animation-delay:.4s}@keyframes thinkingBlink{0%,80%,to{opacity:.7}40%{opacity:1}}