body {
  min-height: 100vh;
  background-color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}

#clock {
  width: 100%;
  max-width: 500px;
}

svg {
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 100vh;
}