body {

  margin: 0;

  padding: 0;

}

canvas {

  display: block;

}

​

button {

  outline: 0;

  text-align: center;

  cursor: pointer;

  height: 20px;

  margin-bottom: 30px;

  border: 0;

  fill: #000000;

  font-size: 10.5px;

  border: 1px solid transparent;

  border-color: #000;

  color: #FFFFFF;

  background: #292525;

  line-height: 0px;

  font-family: Courier New;

}

​

button:hover {

  background: #FFFFFF;

  color: #000000;

  font-weight: bold;

}