@font-face {
  font-family: 'unionregular';
  src: url('fonts/union.eot');
  src: url('fonts/union.eot?#iefix') format('embedded-opentype'), url('fonts/union.woff2') format('woff2'), url('fonts/union.woff') format('woff'), url('fonts/union.ttf') format('truetype'), url('fonts/union.svg#unionregular') format('svg');
  font-weight: normal;
  font-style: normal;
}

body {
  background-color: black;
  font-family: 'unionregular', sans-serif;
  font-size: 100px;
  text-rendering: optimizeLegibility;
  font-smoothing: antialiased;
}

@media (max-width: 600px) {
  body {
    font-size: 50px;
  }
}

.mars,
.earth {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  text-align: center;
  mix-blend-mode: difference;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}

.mars {
  color: red;
}

.earth {
  color: blue;
}

.digits {
  display: inline-block;
  width: 1.25em;
  text-align: center;
}