.reference-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
	margin-top: 1.5em;
}

.reference-filter {
	display: flex;
	flex-wrap: wrap;
}

.reference-item {
	opacity: 1;
	transform: scale(1);
	transition: opacity 0.2s linear, transform 0.2s linear;
	height: 80px;
	width: 80px;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}

.reference-item.invisible {
	opacity: 0.2;
	transform: scale(0.4);
}

.reference-item img {
	max-width: 100%;
	max-height: 100%;
}

.reference-filter-btn {
	background: transparent;
	border: 1px solid transparent;
	border-radius: 0;
	padding: 0.5em 1em;
	position: relative;
	overflow: hidden;
}

.reference-filter-btn h3 {
	margin: 0;
	padding: 0;
	pointer-events: none;
	font-size: 1.25em;
}

.reference-filter-btn.active {
	border-bottom: 1px solid var(--wp--preset--color--accent-1);
}

.reference-filter-btn.active::before {
	left: 0;
}

.reference-filter-btn::before {
	content: "";
	height: 0;
	width: 0;
	border: 0.5em solid transparent;
	border-left-color: var(--wp--preset--color--accent-1);
	position: absolute;
	top: 30%;
	left: -1em;
	transition: left 0.2s linear;
}

.reference-filter-btn:focus:not(:focus-visible) {
	outline: none;
}