amis/scss/layout/_grid.scss

@mixin make-grid($class) {
  @for $i from 1 through $Grid-columns {
    .#{$ns}Grid-col--#{$class}#{$i} {
      flex: 0 0 percentage($i / $Grid-columns);
      max-width: percentage($i / $Grid-columns);
      min-height: 1px;
      padding-left: ($Grid-gutterWidth / 2);
      padding-right: ($Grid-gutterWidth / 2);
    }
  }

  .#{$ns}Grid-col--#{$class} {
    flex-basis: 0;
    flex-grow: 1;
    min-height: 1px;
    max-width: 100%;
    width: 100%;
    padding-left: ($Grid-gutterWidth / 2);
    padding-right: ($Grid-gutterWidth / 2);
  }

  .#{$ns}Grid-col--#{$class}Auto {
    flex: 0 0 auto;
    width: auto;
    max-width: 100%;
    padding-left: ($Grid-gutterWidth / 2);
    padding-right: ($Grid-gutterWidth / 2);
  }
}

// Generate Grid row
@mixin make-row($gutter: $Grid-gutterWidth) {
  margin-left: ($gutter / -2);
  margin-right: ($gutter / -2);
  display: flex;
  flex-wrap: wrap;
}

@include make-grid(xs);

@include media-breakpoint-up(sm) {
  .#{$ns}Grid {
    @include make-row;
    flex: 1;

    &--hRight {
      justify-content: flex-end;
    }

    &--hCenter {
      justify-content: center;
    }
    &--hBetween {
      justify-content: space-between;
    }

    &--vMiddle > div {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    &--vBottom > div {
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }

    &--vBetween > div {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    & > &-col--vTop {
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

    & > &-col--vMiddle {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    & > &-col--vBottom {
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }

    & > &-col--vBetween {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
  }

  @include make-grid(sm);
}

@include media-breakpoint-up(md) {
  @include make-grid(md);
}

@include media-breakpoint-up(lg) {
  @include make-grid(lg);
}

.#{$ns}Grid--none {
  margin-left: 0;
  margin-right: 0;

  > div {
    padding-left: 0;
    padding-right: 0;
  }
}

.#{$ns}Grid--xs {
  margin-left: calc(var(--gap-xs) * -0.5);
  margin-right: calc(var(--gap-xs) * -0.5);

  > div {
    padding-left: calc(var(--gap-xs) * 0.5);
    padding-right: calc(var(--gap-xs) * 0.5);
  }
}

.#{$ns}Grid--sm {
  margin-left: calc(var(--gap-sm) * -0.5);
  margin-right: calc(var(--gap-sm) * -0.5);

  > div {
    padding-left: calc(var(--gap-sm) * 0.5);
    padding-right: calc(var(--gap-sm) * 0.5);
  }
}

.#{$ns}Grid--base {
  margin-left: calc(var(--gap-base) * -0.5);
  margin-right: calc(var(--gap-base) * -0.5);

  > div {
    padding-left: calc(var(--gap-base) * 0.5);
    padding-right: calc(var(--gap-base) * 0.5);
  }
}

.#{$ns}Grid--md {
  margin-left: calc(var(--gap-md) * -0.5);
  margin-right: calc(var(--gap-md) * -0.5);

  > div {
    padding-left: calc(var(--gap-md) * 0.5);
    padding-right: calc(var(--gap-md) * 0.5);
  }
}

.#{$ns}Grid--lg {
  margin-left: calc(var(--gap-lg) * -0.5);
  margin-right: calc(var(--gap-lg) * -0.5);

  > div {
    padding-left: calc(var(--gap-lg) * 0.5);
    padding-right: calc(var(--gap-lg) * 0.5);
  }
}