.chat-loading-screen{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:9999;color:#fff}.chat-loader{width:50px;height:50px;border:5px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{to{transform:rotate(360deg)}}.chat-preload-hidden{display:none!important}@keyframes chat-fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.chat-theme-toggle{position:absolute;top:20px;right:20px;z-index:1000}.chat-theme-toggle .chat-btn-icon{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.3);color:#fff}.chat-theme-toggle .chat-btn-icon:hover{background:rgba(255,255,255,.3);border-color:#fff}@media (prefers-reduced-motion:reduce){*,.chat-loader,::after,::before{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important}}