:root{--bg-color: #FFFFFF;--sidebar-bg-color: #F9FAFB;--message-assistant-bg-color: transparent;--message-user-bg-color: #E5E7EB;--border-color: #E5E7EB;--text-color: #1F2937;--text-color-light: #111827;--text-color-subtle: #6B7280;--hover-bg-color: #E5E7EB;--primary-color: #10B981;--accent-color: #7a59f5}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background-color:var(--bg-color);color:var(--text-color);height:100vh;overflow:hidden}#app-layout{display:flex;height:100vh;position:relative}#sidebar{width:300px;background-color:#f9fafb;display:flex;flex-direction:column;border-right:1px solid #E5E7EB;flex-shrink:0;z-index:50;transition:transform .3s ease-in-out}#sidebar-header{padding:1.25rem 1rem 1rem;border-bottom:none}.logo-container{display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;padding-left:0}.logo-container img{height:28px;width:auto}#new-chat-btn{width:100%;padding:.75rem 1rem;background-color:#fff;border:1px solid #E5E7EB;box-shadow:0 1px 2px #0000000d;border-radius:8px;color:#374151;font-size:.9rem;font-weight:500;cursor:pointer;text-align:left;transition:all .2s ease;display:flex;align-items:center;gap:10px}#new-chat-btn:hover{background-color:#fff;border-color:#d1d5db;box-shadow:0 4px 6px #0000000d;color:#111827}#history-nav{flex-grow:1;overflow-y:auto;padding:.5rem .75rem;margin-top:.5rem}#history-nav::-webkit-scrollbar{width:5px}#history-nav::-webkit-scrollbar-track{background:transparent}#history-nav::-webkit-scrollbar-thumb{background-color:#e5e7eb;border-radius:20px}#history-nav:hover::-webkit-scrollbar-thumb{background-color:#d1d5db}#history-nav p{margin:0 0 .5rem .5rem;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:#9ca3af;font-weight:600}#history-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}.history-item-controls{position:absolute;right:8px;top:50%;transform:translateY(-50%);display:flex;align-items:center;gap:2px;opacity:0;transition:opacity .2s ease;background:linear-gradient(90deg,#e5e7eb00,#e5e7eb 20%);padding-left:10px;border-radius:0 8px 8px 0}.history-item.active .history-item-controls{background:linear-gradient(90deg,#f3f4f600,#f3f4f6 20%)}.history-item:hover .history-item-controls,.history-item.active:hover .history-item-controls,.history-item.active .history-item-controls{opacity:1}.control-btn{background:transparent;border:none;cursor:pointer;font-size:.8rem;padding:4px;color:#6b7280;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:color .2s,background-color .2s}.control-btn:hover{background-color:#fff;color:#111827;box-shadow:0 1px 2px #0000001a}#sidebar-footer{padding:1rem;border-top:1px solid #E5E7EB;background-color:#f9fafb}.sidebar-lang-switcher{display:flex;gap:6px;margin-bottom:8px}.sidebar-lang-switcher .lang-btn{flex:1;padding:5px 0;border:1px solid #D1D5DB;border-radius:6px;background:transparent;color:#6b7280;font-size:.75rem;font-weight:600;cursor:pointer;transition:all .2s;letter-spacing:.5px}.sidebar-lang-switcher .lang-btn:hover{border-color:#9ca3af;color:#374151}.sidebar-lang-switcher .lang-btn.active{background-color:#111827;border-color:#111827;color:#fff}#logout-btn{width:100%;padding:.6rem .75rem;border:none;border-radius:8px;background-color:transparent;color:#4b5563;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s;text-align:left;display:flex;align-items:center;gap:10px}#logout-btn:hover{background-color:#000;color:#fff}#chat-container{display:flex;flex-direction:column;height:100vh;position:relative;flex-grow:1;background-color:var(--bg-color)}header{display:none}#mobile-header{display:none;align-items:center;padding:.75rem 1rem;border-bottom:1px solid var(--border-color);background-color:var(--bg-color)}#menu-toggle-btn{background:none;border:none;font-size:1.25rem;cursor:pointer;color:var(--text-color)}#chat-box{flex:1;overflow-y:auto;overflow-x:hidden;width:100%;max-width:900px;margin:0 auto;padding:2rem 1rem;display:flex;flex-direction:column;gap:1.5rem;box-sizing:border-box}#chat-box::-webkit-scrollbar{width:5px}#chat-box::-webkit-scrollbar-track{background:transparent}#chat-box::-webkit-scrollbar-thumb{background-color:#e5e7eb;border-radius:20px}#chat-box:hover::-webkit-scrollbar-thumb{background-color:#d1d5db}.message-wrapper{display:flex;gap:12px;width:100%;align-items:flex-start}.user-wrapper{flex-direction:row-reverse}.user-message-content{background-color:var(--message-user-bg-color);border-radius:12px 12px 0;margin-left:auto}.assistant-wrapper{display:grid;grid-template-columns:36px minmax(0,1fr);gap:0 12px}.avatar-thinking.assistant-avatar,.avatar-thinking.assistant-avatar img{overflow:visible!important}.assistant-avatar{grid-column:1;grid-row:1;background-color:#fff;padding:2px}.avatar{width:36px;height:36px;border-radius:6px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.avatar img{width:100%;height:100%;border-radius:4px;object-fit:contain}.assistant-message-content{grid-column:2;grid-row:1;background-color:var(--message-assistant-bg-color);border-radius:12px 12px 12px 0;border:1px solid transparent}.message-content{padding:.75rem 1rem;line-height:1.6;font-size:.95rem;color:var(--text-color);width:fit-content;max-width:100%;word-wrap:break-word;overflow-wrap:break-word;word-break:break-word}.message-content code{background:#0000000d;padding:2px 4px;border-radius:4px;font-family:monospace;font-size:.9em;color:#e01e5a}.code-block-wrapper{margin:12px 0;border-radius:8px;overflow:hidden;border:1px solid #4b5563;box-shadow:0 4px 6px #0000001a}.code-block-header{display:flex;justify-content:space-between;align-items:center;background-color:#2d2d2d!important;padding:8px 12px;color:#e5e7eb;font-family:sans-serif;font-size:.75rem;border-bottom:1px solid #404040}.code-block-wrapper pre{background-color:#383838!important;color:#f3f4f6!important;margin:0!important;padding:16px 20px!important;border:none!important;border-radius:0!important;overflow-x:auto;width:100%;font-family:Consolas,Monaco,monospace;font-size:.9rem;line-height:1.6;display:block;box-sizing:border-box}.code-block-wrapper pre::-webkit-scrollbar{height:8px}.code-block-wrapper pre::-webkit-scrollbar-thumb{background-color:#4a4a4a;border-radius:4px}.code-block-wrapper pre::-webkit-scrollbar-track{background-color:#2d2d2d}.code-block-wrapper pre code{background-color:transparent!important;color:#f3f4f6!important;font-family:Consolas,Monaco,monospace;font-size:.9rem;padding:0;border:none}.copy-code-btn{background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:4px;color:#d1d5db;cursor:pointer;font-size:.75rem;padding:4px 8px;display:flex;align-items:center;gap:6px;transition:all .2s}.copy-code-btn:hover{background-color:#ffffff1a;color:#fff}.message-actions{grid-column:2;grid-row:2;display:flex;gap:6px;padding-top:6px;padding-left:2px;width:100%}.feedback-btn{background:transparent;border:1px solid transparent;cursor:pointer;font-size:.85rem;color:#9ca3af;padding:4px 6px;border-radius:6px;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.feedback-btn:hover{background-color:#0000000d;color:var(--text-color);transform:scale(1.05)}.feedback-btn.selected{transform:scale(1);cursor:default}.feedback-btn.selected[data-type=positive]{color:#10b981;background-color:#10b9811a}.feedback-btn.selected[data-type=negative]{color:#ef4444;background-color:#ef44441a}.thinking-state{color:#6b7280;font-style:italic;font-size:.95rem;display:flex;align-items:center;gap:8px;animation:pulse 1.5s infinite ease-in-out}@keyframes pulse{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}.thinking-state i{font-size:.9rem}.sources-container{margin-top:12px;padding-top:12px;border-top:1px solid #e5e7eb;display:flex;flex-wrap:wrap;gap:8px}.sources-label{font-size:.7rem;color:#6b7280;width:100%;margin-bottom:4px;font-weight:700;text-transform:uppercase}.source-chip{display:inline-flex;align-items:center;gap:6px;background-color:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:6px 10px;text-decoration:none;color:#374151;font-size:.8rem;transition:all .2s ease;box-shadow:0 1px 2px #0000000d;max-width:100%}.source-chip:hover{background-color:#f9fafb;border-color:#d1d5db;transform:translateY(-1px);box-shadow:0 2px 4px #00000014}.source-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}footer{flex-shrink:0;width:100%;background:linear-gradient(180deg,#fff0,#fff 50%);padding-bottom:1.5rem;position:relative;z-index:20}#chat-form-wrapper{max-width:800px;margin:0 auto;padding:0 1rem;display:flex;flex-direction:column}.input-group-container{background-color:#fff;border-radius:28px;padding:12px 16px;display:flex;flex-direction:column;border:1px solid #e5e7eb;box-shadow:0 4px 12px #00000014;transition:all .2s ease}.input-group-container:focus-within{border-color:#c2c2c2;box-shadow:0 0 0 2px #1118270f,0 6px 20px #00000014}.drag-active-zone{border:2px dashed #0b57d0!important;background-color:#f0f8ff!important;transform:scale(1.01)}.drag-active-zone *{pointer-events:none}#user-input{width:100%;border:none;background:transparent;resize:none;font-size:1rem;color:var(--text-color);padding:4px 0 12px 4px;outline:none;line-height:1.5;max-height:200px;font-family:inherit}.input-tools-row{display:flex;justify-content:space-between;align-items:center}.tools-left{display:flex;align-items:center}#attach-btn{background:transparent;border:none;cursor:pointer;padding:0;color:#1f1f1f;transition:transform .2s}.icon-circle{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem}#attach-btn:hover .icon-circle{background-color:#0000000f}.tools-right{display:flex;align-items:center;gap:12px}#model-selector-wrapper{position:relative}.model-pill{display:flex;align-items:center;gap:6px;background-color:transparent;border:none;font-size:.85rem;font-weight:600;color:#444746;cursor:pointer;padding:6px 10px;border-radius:8px;transition:background-color .2s}.model-pill:hover{background-color:#0000000f}.model-pill .arrow-icon{font-size:.7rem;margin-top:2px}.model-menu{position:absolute;bottom:120%;right:0;width:260px;background-color:#fff;border-radius:12px;box-shadow:0 2px 6px #00000026,0 8px 24px #0000001a;padding:8px;z-index:100;border:1px solid #e0e0e0}.model-option{display:flex;align-items:center;padding:10px;border-radius:8px;cursor:pointer;color:#1f1f1f}.model-option:hover{background-color:#f2f2f2}.model-option.selected{color:#111827}.model-option.selected .option-title{font-weight:700}.option-icon{margin-right:12px;display:flex;align-items:center}.option-details{flex:1}.option-title{font-size:.9rem;font-weight:500;display:block}.option-desc{font-size:.75rem;color:#757575}.model-option.selected .option-desc{color:#374151}.check-icon{display:none;font-size:.9rem}.model-option.selected .check-icon{display:block}#send-btn{background-color:transparent;border:none;width:38px;height:38px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#1f1f1f;border-radius:50%;transition:all .2s ease}#send-btn:hover{background-color:#000;color:#fff;transform:scale(1.05)}#send-btn.generating{background-color:#ef4444!important;color:#fff!important}#send-btn.generating:hover{background-color:#dc2626!important;transform:scale(1.05)}#file-preview-container{display:flex;flex-wrap:wrap;gap:10px;padding:0 4px 10px;max-height:150px;overflow-y:auto}.file-preview-item{display:flex;align-items:center;background-color:#fff;border:1px solid #e0e0e0;border-radius:12px;padding:8px 12px;box-shadow:0 2px 5px #0000000d;transition:all .2s ease;animation:popIn .3s cubic-bezier(.175,.885,.32,1.275);max-width:220px}.file-preview-item:hover{transform:translateY(-2px);box-shadow:0 4px 8px #00000014}.file-preview-item .file-icon{font-size:1.2rem;margin-right:10px}.file-preview-item .file-details{display:flex;flex-direction:column;overflow:hidden;margin-right:10px}.file-preview-item .file-name{font-size:.85rem;font-weight:600;color:#333;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-preview-item .file-size{font-size:.7rem;color:#888}.file-preview-item .remove-file-btn{background:#f3f4f6;border:none;border-radius:50%;width:20px;height:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1rem;color:#666;line-height:1;transition:all .2s}.file-preview-item .remove-file-btn:hover{background-color:#fee2e2;color:#ef4444}@keyframes popIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.disclaimer{text-align:center;font-size:.7rem;color:#757575;margin-top:6px}#auth-container{width:100%;height:100vh;display:flex;justify-content:center;align-items:center;background-color:#f3f4f6;background-image:linear-gradient(#0006,#0006),url(/assets/background.jpg);background-size:cover;background-position:center}.auth-form-container{width:100%;max-width:400px;padding:2.5rem;background-color:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:12px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;text-align:center;position:relative}.logo-auth{margin-bottom:2rem}.logo-auth img{height:40px;width:auto}.auth-form-container h2{margin:0 0 1rem;color:#111827}.auth-form-container p{color:#6b7280;margin-bottom:2rem}.auth-btn{display:block;width:100%;padding:.75rem;background-color:#1f2937;color:#fff;border:none;border-radius:6px;font-weight:600;text-decoration:none;cursor:pointer;transition:background-color .2s;margin-bottom:1rem;box-sizing:border-box}.auth-btn:hover{background-color:#111827}.auth-btn.admin{background-color:transparent;color:#4b5563;border:1px solid #D1D5DB}.auth-btn.admin:hover{background-color:#f3f4f6;color:#111827}#language-switcher{position:absolute;top:1rem;right:1rem;display:flex;gap:4px;background:#ffffff80;padding:4px;border-radius:6px}#language-switcher button{background:none;border:none;padding:4px 8px;font-size:.8rem;font-weight:600;color:#6b7280;cursor:pointer;border-radius:4px}#language-switcher button.active{background-color:#fff;color:#111827;box-shadow:0 1px 2px #0000001a}#overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;z-index:40;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}@media(max-width:768px){#app-layout{flex-direction:column}#sidebar{position:fixed;height:100%;transform:translate(-100%)}#app-layout.sidebar-visible #sidebar{transform:translate(0)}#mobile-header{display:flex;justify-content:space-between}#chat-box{padding:1rem}.message-content{max-width:90%}.assistant-wrapper{grid-template-columns:32px minmax(0,1fr)}.avatar,.assistant-avatar{width:32px;height:32px}}.user-avatar{width:42px!important;height:42px!important;min-width:42px!important;border-radius:50%!important;padding:0!important;border:none!important;margin-right:10px!important;overflow:hidden!important;display:flex!important;align-items:center!important;justify-content:center!important;flex-shrink:0!important;box-shadow:0 2px 5px #0000001a}.user-profile-pic{width:100%!important;height:100%!important;object-fit:cover!important;object-position:center top!important;display:block!important;border-radius:0!important}.assistant-avatar{width:48px!important;height:40px!important;min-height:40px!important;flex-shrink:0!important;border-radius:0!important;overflow:visible!important;padding:1!important;background-color:transparent!important;border:none!important;box-shadow:none!important;display:flex!important;align-items:center!important;justify-content:center!important;box-sizing:border-box!important;animation:welcomePulse 1.5s ease-in-out infinite}.assistant-avatar img{width:100%!important;height:100%!important;object-fit:contain!important;border-radius:0!important;transform:scale(1.7)!important;user-select:none!important;-webkit-user-select:none!important;-webkit-user-drag:none!important;pointer-events:none!important}.table-container{width:100%;overflow-x:auto;margin:1.5rem 0;border-radius:8px;border:1px solid #E5E7EB;box-shadow:0 1px 2px #0000000d}.message-content table{width:100%;table-layout:fixed;border-collapse:collapse;font-size:.85rem;background-color:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.table-scroll-wrapper{width:100%;overflow-x:auto;margin:1.5rem 0;border-radius:8px;border:1px solid #E5E7EB;box-shadow:0 1px 2px #0000000d}.message-content th{background-color:#f9fafb;color:#111827;font-weight:600;text-align:left;padding:12px 16px;border-bottom:2px solid #E5E7EB;white-space:normal}.message-content td{padding:12px 16px;color:#374151;border-bottom:1px solid #E5E7EB;vertical-align:top;line-height:1.5;word-wrap:break-word}.message-content tr:nth-child(2n){background-color:#f9fafb}.message-content tr:hover{background-color:#f3f4f6}.table-container::-webkit-scrollbar{height:6px}.table-container::-webkit-scrollbar-thumb{background-color:#d1d5db;border-radius:10px}.table-container::-webkit-scrollbar-track{background:transparent}.history-item{position:relative;display:flex;justify-content:space-between;align-items:center;padding:.6rem .75rem;gap:10px;font-size:.85rem;border-radius:8px;cursor:pointer;color:#4b5563;border:1px solid transparent;transition:background-color .2s ease,color .2s ease;overflow:visible}.history-item-title{flex-grow:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500;margin-right:4px}.history-actions{width:24px;height:24px;display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative}.pinned-icon{font-size:.8rem;transform:rotate(45deg);display:block;color:transparent;-webkit-text-stroke:1.5px #374151}.history-menu-btn{background:transparent;border:none;color:#374151;cursor:pointer;font-size:.9rem;padding:0;border-radius:50%;width:100%;height:100%;display:none;align-items:center;justify-content:center;transition:background-color .2s}.history-menu-btn:hover,.history-menu-btn.active{background-color:#d1d5db;color:#000}.history-item.pinned-item:hover .pinned-icon{display:none}.history-item.pinned-item:hover .history-menu-btn,.history-item:hover .history-menu-btn{display:flex}.history-menu-btn.active{display:flex!important}.history-item:has(.history-menu-btn.active) .pinned-icon{display:none}.history-dropdown{position:absolute;top:100%;right:0;width:150px;background-color:#fff;border:1px solid #E5E7EB;border-radius:8px;box-shadow:0 10px 15px -3px #0000001a;z-index:9999;padding:4px;display:none;flex-direction:column}.history-dropdown.show{display:flex;animation:fadeIn .1s ease-out}.dropdown-item{background:transparent;border:none;text-align:left;padding:8px 12px;font-size:.85rem;color:#374151;cursor:pointer;border-radius:4px;display:flex;align-items:center;gap:8px;width:100%}.dropdown-item:hover{background-color:#f3f4f6;color:#111827}.dropdown-item.delete{color:#ef4444}.dropdown-item.delete:hover{background-color:#fef2f2}#venapps-container{padding:10px 14px;border-bottom:1px solid #E5E7EB;background-color:#f9fafb}.venapps-header{display:flex;justify-content:space-between;align-items:center;font-size:.75rem;font-weight:700;color:#6b7280;text-transform:uppercase;margin-bottom:8px;letter-spacing:.05em}#create-venapp-btn{background:none;border:none;color:var(--primary-color);cursor:pointer;font-size:.9rem;padding:2px 6px;border-radius:4px;transition:background .2s}#create-venapp-btn:hover{background-color:#e5e7eb}#venapps-list{display:flex;flex-direction:column;gap:2px;max-height:none;overflow-y:visible}.venapp-item{display:flex;align-items:center;padding:6px 10px;min-height:32px;border-radius:6px;cursor:pointer;font-size:.85rem;color:#374151;transition:all .2s;border:1px solid transparent}.venapp-item:hover{background-color:#fff;border-color:#e5e7eb;box-shadow:0 1px 2px #0000000d}.venapp-item.active{background-color:#f3f4f6;color:#111827;border-color:#d1d5db;font-weight:600}.venapp-icon{margin-right:10px;font-size:1.1rem;line-height:1;width:20px;text-align:center}.venapp-logo-img{width:30px!important;height:30px!important;min-width:30px!important;object-fit:contain;margin-right:10px;display:block}.venapp-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.venapp-delete{visibility:hidden;background:transparent;border:none;color:#9ca3af;cursor:pointer;font-size:1.1rem;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:all .2s}.venapp-item:hover .venapp-delete{visibility:visible}.venapp-delete:hover{background-color:#fee2e2;color:#ef4444}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000040;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:2000;display:flex;justify-content:center;align-items:center}.hidden{display:none!important}.professional-modal{width:600px;max-width:95%;border-radius:16px;background-color:#fff;box-shadow:0 25px 50px -12px #00000040;display:flex;flex-direction:column;font-family:inherit;animation:slideUp .3s ease-out}.modal-header-pro{padding:24px 24px 0;display:flex;justify-content:space-between;align-items:flex-start}.header-text h3{margin:0;font-size:1.25rem;font-weight:700;color:#111827}.header-text p{margin:4px 0 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