body { font-family: Arial; display:flex; flex-direction:column; align-items:center; margin:0; padding:0; background:#f0f2f5; }
.container { background:white; padding:20px; margin-top:50px; border-radius:8px; box-shadow:0 4px 10px rgba(0,0,0,0.1); width:300px; text-align:center; }
input { width:90%; padding:10px; margin:10px 0; }
button { width:95%; padding:10px; background:#4CAF50; color:white; border:none; border-radius:5px; cursor:pointer; }
button:hover { background:#45a049; }
.toggle-link { color:blue; cursor:pointer; text-decoration:underline; }
#chat-window { width:90%; height:400px; border:1px solid #ccc; overflow-y:auto; margin:20px 0; padding:10px; background:#fff; }