locomotive-boilerplate/assets/styles/utilities/_grid-column.scss

// ==========================================================================
// Tools / Grid Columns
// ==========================================================================

//
// Grid layout system.
//
// This tool generates columns for all needed media queries.
// Unused classes will be purge by the css post-processor.
//

$colsMax: $base-column-nb + 1;

@each $breakpoint, $mediaquery in $breakpoints {
    @for $fromIndex from 1 through $colsMax {
        @for $toIndex from 1 through $colsMax {

            // Columns without media query
            @if $breakpoint == "tiny" {
                .u-gc-#{$fromIndex}\/#{$toIndex} {
                    --gc-start: #{$fromIndex};
                    --gc-end: #{$toIndex};
                }
            }

            // Columns min-width breakpoints `@from-*`
            .u-gc-#{$fromIndex}\/#{$toIndex}\@from-#{$breakpoint} {
                @media #{mq-min($breakpoint)} {
                    --gc-start: #{$fromIndex};
                    --gc-end: #{$toIndex};
                }
            }

            // Columns max-width breakpoints @to-*`
            .u-gc-#{$fromIndex}\/#{$toIndex}\@to-#{$breakpoint} {
                @media #{mq-max($breakpoint)} {
                    --gc-start: #{$fromIndex};
                    --gc-end: #{$toIndex};
                }
            }
        }
    }
}