css

body {
  background-color: white;
  text-align: center;
}

#container {
  margin-top: 200px;
}

.button {
  font-size: 18px;
  padding: 10px 20px;
  margin: 5px;
  cursor: pointer;
  border: none;
}

#button1 {
  background-color: red;
  color: white;
}

#button2 {
  background-color: blue;
  color: white;
}

#button3 {
  background-color: green;
  color: white;
}