#chat-toggle{position:fixed;bottom:20px;right:20px;padding:12px 15px;border-radius:50%;border:none;cursor:pointer;font-size:20px}#chat-box{position:fixed;bottom:80px;right:20px;width:300px;height:400px;background:#fff;border:1px solid #ccc;display:flex;flex-direction:column}.hidden{display:none}#chat-header{background:#6b4eff;color:#fff;padding:10px}#chat-messages{flex:1;padding:10px;overflow-y:auto}#chat-input{padding:10px;border:none;border-top:1px solid #ccc}