gutenberg.scss

/* Post title width */
.editor-post-title__block.wp-block {
	max-width: $content-width;

	/* Post title styling */
	.editor-post-title__input {
	}
}

/* Main column width */
.wp-block {
    max-width: $content-width;

	/* Wide column width */
	&[data-align="wide"] {
		max-width: none;

		@include media(">=medium") {
			max-width: none;
			margin-left: calc(25vw - 25%);
			margin-right: calc(25vw - 25%);
		}
	}

	/* Full column width */
	&[data-align="full"] {
		max-width: none;
	}
}