html {
  direction: ltr;
  box-sizing: border-box;
  font-size: 6.25%;
  height: 100%;
}

* {
  position: relative;
  display: flex;
  flex-flow: column;
  flex-shrink: 0;
  /* overflow: hidden; */
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  margin: 0;
  font-size: 16rem;
  height: 100%; /* or min-height */
}