themes-wordpress/dalston/block-extends/extend-columns-block.css

/* Full Bleed Columns */
.wp-block-columns.is-style-full-bleed {

}

.wp-block-columns.is-style-full-bleed.alignfull {
	padding-left: 0;
	padding-right: 0;
}

.wp-block-columns.is-style-full-bleed .wp-block-column:not(:last-child) {
    margin-bottom: 0;
}

@media (min-width: 600px) {

	.wp-block-columns.is-style-full-bleed .wp-block-column {
		flex-basis: 50%;
	}

	.wp-block-columns.is-style-full-bleed .wp-block-column:nth-child(2n) {
		margin-left: 0;
	}
}

@media (min-width: 782px) {

	.wp-block-columns.is-style-full-bleed .wp-block-column:not(:first-child) {
		margin-left: 0;
	}
}

/* Remove gutters */
[data-type="core/columns"][data-align=full] .wp-block-columns.is-style-full-bleed > .editor-inner-blocks {
	padding-left: 0;
	padding-right: 0;
}

@media (min-width: 600px) {
	[data-type="core/columns"][data-align=full] .wp-block-columns.is-style-full-bleed > .editor-inner-blocks {
		padding-left: 0;
		padding-right: 0;
	}
}

@media (min-width: 600px) {
	.wp-block-columns.is-style-full-bleed > .editor-inner-blocks > .editor-block-list__layout > [data-type="core/column"]:nth-child(2n) {
		margin-left: 0;
	}
}

@media (min-width: 782px) {
	.wp-block-columns.is-style-full-bleed > .editor-inner-blocks > .editor-block-list__layout > [data-type="core/column"]:not(:first-child) {
		margin-left: 0;
	}
}

@media (min-width: 600px) {
	.wp-block-columns.is-style-full-bleed > .editor-inner-blocks > .editor-block-list__layout > [data-type="core/column"] {
		flex-basis: calc(50% - 28px);
		margin-left: 14px;
		margin-right: 14px;
	}
}

/* Project */

.wp-block-columns.is-style-project.alignfull {
	padding-left: 16px;
	padding-right: 16px;
}

@media (min-width: 600px) {

	.wp-block-columns.is-style-project.alignfull {
		padding-left: 32px;
		padding-right: 0;
	}

	.wp-block-columns.is-style-project > .wp-block-column:nth-child(2n) {
		margin-left: 0;
	}
}

@media (min-width: 1024px) {

	.wp-block-columns.is-style-project > .wp-block-column:first-child {
		padding-right: 32px;
	}
	.wp-block-columns.is-style-project > .wp-block-column:not(:first-child) {
		margin-left: 0;
	}
	.wp-block-columns.is-style-project > .wp-block-column,
	.wp-block-columns.is-style-project > .editor-inner-blocks > .editor-block-list__layout > [data-type="core/column"] {
		flex-basis: 100% !important;
	}
	.wp-block-columns.is-style-project > .wp-block-column:first-of-type,
	.wp-block-columns.is-style-project > .editor-inner-blocks > .editor-block-list__layout > [data-type="core/column"]:first-of-type {
		flex-shrink: 0;
		flex-basis: auto !important;
		width: calc( 0.5 * (100vw - calc( 782px - 32px) - 64px)) !important;
	}
}