CocoClassHelpDocs/.vitepress/theme/_screen.scss

@mixin breakpoint($point) {
  @if $point == mobile {
    @media (max-width: 640px) { @content; }
  }
  @else if $point == tablet {
    @media (max-width: 768px) { @content; }
  }
  @else if $point == laptop {
    @media (max-width: 1024px) { @content; }
  }
}