.wrap{max-width:600px;margin:40px auto;font-family:sans-serif}.box{border:1px solid #ccc;height:400px;overflow-y:auto;padding:16px}.user{text-align:right;margin:8px 0}.bot{text-align:left;margin:8px 0}.user p,.bot p{display:inline-block;padding:8px 12px;border-radius:8px}.user p{background:#d1e7ff}.bot p{background:#f0f0f0}.loading{color:#888;font-style:italic}.input-row{display:flex;gap:8px;margin-top:8px}.input-row input{flex:1;padding:8px}.input-row button{padding:8px 16px;cursor:pointer}