html {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  font-size: 62.5%;
}

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

body {
  margin: 2rem;
  margin-left: 5%;
  margin-right: 5%;
}

@media screen and (max-width: 768px) {
  body {
    margin: 1.5rem;
    margin-left: 1.5rem;
    margin-right: 1.5rem;
  }
}