body { background-color:#ECF0F1;}

#pop {
  margin: 30px auto;
  display: block;
  width: 350px;
  height: 350px;
}

#pop .primary {
  background-image: url(../img/button.png);
  background-size: contain;
  border-radius: 50%;
  width: 100px;
  height: 100px;
  margin: auto;
  display: block;
}

#pop .secondary {
  background-image: url(../img/heart.png);
  background-size: contain;
  height: 100px;
  width: 100px;
  display: block;
}