html {
  font-size: 16px;
}

@media screen and (max-width: 600px) {
  html {
    font-size: 8px;
  }
}
@media screen and (max-width: 960px) {
  html {
    font-size: 12px;
  }
}
@media screen and (min-width: 2500px) {
  html {
    font-size: 30px;
  }
}