html,
body {
  height: 100%;
}
@media screen and (max-width: 767px) {
  html {
    font-size: 18px;
  }
}
@media screen and (min-width: 768px) {
  html {
    font-size: 20px;
  }
}
@media screen and (min-width: 970px) {
  html {
    font-size: 24px;
  }
}
@media screen and (min-width: 1200px) {
  html {
    font-size: 28px;
  }
}
