.lc{max-width:420px;height:600px;border-radius:14px;overflow:hidden;box-shadow:0 4px 18px #ddd;background:#fff;display:flex;flex-direction:column;font-family:Arial,sans-serif}.lc .head{background:#f58220;color:white;padding:16px;font-weight:bold}.lc .body{flex:1;overflow-y:auto;padding:14px;background:#fafafa}.lc .bot,.lc .msg{background:#fff;padding:10px 12px;border-radius:12px;margin:8px 0;box-shadow:0 1px 5px #ddd;max-width:75%;width:max-content}.lc .user{background:#f58220;color:white;margin:8px 0 8px auto;padding:10px 12px;border-radius:12px;max-width:75%;width:max-content}.lc .input{display:flex;padding:10px;border-top:1px solid #eee}.lc input{flex:1;padding:12px;border:1px solid #ddd;border-radius:20px;min-width:0}.lc button{width:44px;margin-left:6px;border:0;border-radius:50%;background:#f58220;color:white}@media(max-width:768px){.lc{width:100%!important;max-width:100%!important;height:100dvh;border-radius:0}.lc .body{flex:1}.lc .input{display:flex}.lc .bot,.lc .user{max-width:85%}}