/* Set up page widths & margins */
.page-width-wide,
.page-width-normal,
.page-width-narrow,
.page-width-content {
  --page-margin: 20px;
}

@media screen and (min-width: 750px) {
  .page-width-wide,
  .page-width-normal,
  .page-width-narrow,
  .page-width-content {
    --page-margin: 50px;
  }
}