body{
  background:#111;
  color:white;
  font-family:Arial;
  display:flex;
  justify-content:center;
  margin-top:50px;
}

.container{
  width:400px;
}

input{
  width:100%;
  padding:10px;
  margin-top:10px;
  border:none;
  border-radius:5px;
}

button{
  margin-top:10px;
  padding:10px;
  width:100%;
  border:none;
  background:#00ff99;
  cursor:pointer;
  font-weight:bold;
}

#chat{
  height:300px;
  overflow-y:auto;
  background:#222;
  margin-top:20px;
  padding:10px;
  border-radius:10px;
}

.message{
  background:#333;
  padding:8px;
  margin-top:10px;
  border-radius:5px;
}