font-family: Lucida Console, Monospace;

  margin: 0;

  padding: 0;

  background: white;

}

canvas {

  display: block;

}

​

button {

    background-color: #4CAF50;

    border: none;

    color: white;

    padding: 10px 20px;

    text-align: center;

    text-decoration: none;

    display: inline-block;

    font-size: 16px;

    margin: 10px;

    cursor: pointer;

    border-radius: 5px;

}

​