@font-face {
  font-family: "Perfect DOS VGA 437";
  font-style: normal;
  font-weight: normal;
  src: url("fonts/perfect-dos.woff2") format("woff2"),
       url("fonts/perfect-dos.woff") format("woff");
}

body {
  font-family: "Perfect DOS VGA 437", monospace;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  user-select: none;

  /* specific retro wallpaper tile is set randomly by JS onload */
  background-color: #000;
  background-repeat: repeat;
  background-attachment: fixed;
  background-position: center;
}

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

div#cmd, div#display {
  display: block;
  margin: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}
div#cmd {
  width: 600px;
  height: 300px;
  padding: 12px;
  background-color: #000;
  color: #ccc;
  white-space: pre;
  z-index: -100;
}
div#display {
  max-width: 800px;
  max-height: 600px;

  z-index: 100;

  /* fix fuzziness: https://stackoverflow.com/a/13492784 */
  image-rendering: optimizeSpeed;
  image-rendering: -moz-crisp-edges;
  image-rendering: -o-crisp-edges;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
  -ms-interpolation-mode: nearest-neighbor;
}
div#display div {
  background: none !important;
}
div#display div canvas {
  cursor: default !important;
}

span.blink {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* http://tholman.com/github-corners/ */
.github-corner:hover .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%, 100% {
    transform: rotate(0);
  }
  20%, 60% {
    transform: rotate(-25deg);
  }
  40%, 80% {
    transform: rotate(10deg);
  }
}