body {
  background-color: #f7f7f7;
}

header {
  padding-top: 1em;
  text-align: center;
  max-width: 800px;
  margin: auto
}

h1 {
  font-size: 2em;
  font-weight: bold
}

p {
  line-height: 1.75em;
  font-size: 1em
}

#offline-resources {
  display: none
}

.interstitial-wrapper {
  color: #2b2b2b;
  font-size: 1em;
  margin: 0 auto;
  max-width: 600px;
  width: 100%
}

.runner-container {
  direction: ltr;
  height: 150px;
  max-width: 600px;
  overflow: hidden;
  position: absolute;
  top: 50%;
  transform: translate(0, -50%);
  width: 100%;
}

.runner-canvas {
  height: 150px;
  max-width: 600px;
  opacity: 1;
  overflow: hidden;
  position: absolute;
  top: 0;
  z-index: 2
}

.controller {
  background: rgba(247, 247, 247, .1);
  height: 100vh;
  left: 0;
  position: absolute;
  top: 0;
  width: 100vw;
}