chrome-extensions-samples/apps/samples/servo/styles.css

body {
  background-color: #f8f8f8;
  font-family: "helvetica neue", helvetica, sans-serif;
  font-size: 16px;
  overflow: hidden;
}

label {
  display: block;
  padding: 20px;
  border-bottom: solid 1px #ddd;
  border-right: solid 1px #ddd;
  width: 300px;
}

label {
  color: #999;
}

#port-picker,
#status {
  color: #000;
}

#port-picker {
  max-width: 250px;
  margin-right: 10px;
}

#position-input {
  display: block;
   -webkit-appearance:none !important;
  width: 90%;
  margin: 20px auto;
  height: 6px;
  background: rgb(13, 168, 97);
}

#position-input::-webkit-slider-thumb {
  -webkit-appearance:none !important;
  width: 30px;
  height: 30px;
  border-radius: 15px;
  background: rgb(67, 135, 253);
}

#image {
  position: absolute;
  right: 10px;
  top: -10px;
  background-image: url(chrome-logo.svg);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  width: 256px;
  height: 256px;
  -webkit-transition: all .2s linear;
}

#container {
  position: absolute;
  top: 0;
  left: 0;
  width: 640px;
}

#tv {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 640px;
  height: 480px;
  border-left: solid 1px #ddd;
}

#tv video,
#tv img {
  display: none;
}

#tv.working video,
#tv.broken img {
  display: block;
}