html, body {
  margin: 0;
  padding: 0;
}

h3 {
  text-align: center;
  margin: 3px;
  padding: 2px;
  background-color: rgba(255, 255, 255, 0.5);
}
canvas {
  display: block;
}
#counter {
  margin: 0;
  padding: 0;
  white-space: nowrap;
  font-family: monospace;
  text-align: center;
  font-size: calc(100vw / .625 / 9);
}
.bottom {
  position: fixed;
  bottom: 0;
}