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var(--border-primary);border-radius:8px;font-family:inherit;font-size:14px;resize:none;background:var(--bg-primary);color:var(--text-primary);transition:border-color .2s,background-color .3s ease,color .3s ease}.chat-input:focus{outline:none;border-color:var(--brand-primary)}.chat-send-btn{align-self:flex-end;display:flex;align-items:center;gap:8px;background:var(--brand-primary);color:#fff;border:none;border-radius:6px;padding:10px 20px;font-size:14px;font-weight:500;cursor:pointer;transition:background .2s}.chat-send-btn:hover{background:var(--brand-hover)}.chat-send-btn:active{background:var(--brand-active)}.chat-send-btn:disabled{background:var(--border-primary);color:var(--text-disabled);cursor:not-allowed}.send-icon{font-size:16px}.typing-indicator{display:inline-block;color:var(--text-disabled);animation:typingBlink 1.4s infinite;transition:color .3s ease}@keyframes 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12px;border:2px solid var(--border-primary);border-radius:12px;background:var(--bg-secondary);transition:all .2s cubic-bezier(.4,0,.2,1)}.theme-option:hover .theme-option-content{background:var(--bg-hover);border-color:var(--text-tertiary)}.theme-option input[type=radio]:checked+.theme-option-content{background:var(--brand-primary);border-color:var(--brand-primary);box-shadow:0 2px 8px #1967d24d}[data-theme=dark] .theme-option input[type=radio]:checked+.theme-option-content{box-shadow:0 2px 8px #8ab4f84d}.theme-option input[type=radio]:checked+.theme-option-content .theme-label,.theme-option input[type=radio]:checked+.theme-option-content .theme-icon{color:#fff}.theme-icon{font-size:28px;transition:transform .2s ease}.theme-option:hover .theme-icon{transform:scale(1.1)}.theme-label{font-size:13px;font-weight:500;color:var(--text-primary);text-transform:uppercase;letter-spacing:.5px;transition:color .2s ease}@media (max-width: 1024px){.three-column-layout{grid-template-columns:1fr 360px}.left-panel{position:fixed;left:-280px;top:0;bottom:0;width:280px;z-index:1000;transition:left .3s ease;box-shadow:2px 0 8px #00000026}.left-panel.mobile-open{left:0}.mobile-left-menu-btn{display:flex!important}}@media (max-width: 768px){.three-column-layout{grid-template-columns:1fr;height:auto}.right-panel{position:fixed;right:-360px;top:0;bottom:0;width:100%;max-width:360px;z-index:1000;transition:right .3s ease;box-shadow:-2px 0 8px #00000026}.right-panel.mobile-open{right:0}.center-panel{height:calc(100vh - 61px)}.mobile-right-menu-btn{display:flex!important}}@media (max-width: 375px){.left-panel{width:85vw;left:-85vw}.right-panel{width:85vw;max-width:none;right:-85vw}}