html, body {
  display: flex;
  justify-content: center;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #222;
}

.simple-keyboard {
  position: fixed;
  bottom: 0;
  width: 90%;

  /* scale down */
  transform: scale(0.8);
  transform-origin: bottom;

  background-color: #fff5;
  color: rgb(79, 79, 97);

  font-family: Arial, Helvetica, sans-serif;
  text-transform: capitalize;
}