#ball {
  width: 100%;
  background: url("golf-ball-whole.png") no-repeat;
  background-size: 100% auto;
  margin: 0;
  padding: 0;
}

#cutaway {
  width: 100%;
  margin: 0;
  padding: 0;
  -webkit-mask-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/40713/xray-machine.png");
          mask-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/40713/xray-machine.png");
  -webkit-mask-repeat: no-repeat;
          mask-repeat: no-repeat;
  -webkit-mask-size: 150px;
          mask-size: 150px;
  cursor: none;
}

.legend {
  max-width:150px;
}

p a {
  color: inherit;
  text-decoration: underline;
}