.gb-tabs__button {
	position: relative;
}
.gb-tabs__button span {
	background-color: var(--blue-500);
	bottom: -1px;
	content: '';
	display: block;
	height: 3px;
	left: 0;
	position: absolute;
	transform: scaleX(0);
	transform-origin: left;
	width: 100%;
}
.gb-tabs__button.gb-block-is-current span {
	animation-name: tabs-underline;
	animation-timing-function: linear;
}
@keyframes tabs-underline {
	to {
		transform: scaleX(1);
	}
}