.fullsize {
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  padding: 0;

  height: 100vh !important;
  width: 100vw !important;
}

$gap-sizes: ("small": 1vmin, "mid": 3vmin, "large": 5vmin);

@each $size, $dist in $gap-sizes {
  @each $dir in [top, bottom, left, right] {
    .gap-#{$size}-#{$dir} {
      margin-#{$dir}: $dist;
    }
  }
}