.wp-block-heading.is-style-underline-left,
.wp-block-heading.is-style-underline-right,
.wp-block-heading.is-style-underline-center {
	position: relative;

	&:after {
		position: absolute;
		bottom: calc(
			var(--has-theme-content-spacing, 1) * (0.3em + 10px) * -1 / 2
		);

		width: var(--theme-font-size);
		height: 4px;

		content: "";

		border-radius: 10px;
		background-color: var(--color-rouge);
	}
	&:before {
		position: relative;

		display: block;
		overflow: hidden;

		height: 13px;
		margin-top: 0.5rem;

		content: "";
		text-align: center;
	}
}

.wp-block-heading.is-style-underline-left::after {
	left: 0;
}

.wp-block-heading.is-style-underline-right::after {
	right: 0;
}

.wp-block-heading.is-style-underline-center::after {
	right: 0;
	left: 0;

	margin: 0 auto;
}

/* Only back-end
----------------------------------------------- */
.block-editor [data-type="core/heading"] ::after {
	top: initial;
}