#chat-toggle{position:fixed;bottom:20px;right:20px;background:#2a7ae2;color:#fff;border-radius:50%;width:50px;height:50px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.3);font-size:24px;z-index:9999}#chat-box{position:fixed;bottom:80px;right:20px;width:300px;height:400px;border:1px solid #ccc;background:#fff;display:flex;flex-direction:column;font-family:sans-serif;border-radius:10px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.2);z-index:9999}#messages{flex:1;overflow-y:auto;padding:10px;font-size:14px}#input-box{display:flex;border-top:1px solid #ccc}#input-box input{flex:1;border:none;padding:10px}#input-box button{background:#2a7ae2;color:#fff;border:none;padding:0 15px;cursor:pointer}#messages div.user{text-align:right;color:#1d4ed8}#messages div.bot{text-align:left;color:#16a34a}#messages div.system{text-align:center;color:#64748b;font-style:italic}