.back-to-top-button {
	position: fixed;
	right: 1rem;
	bottom: 1rem;
	z-index: 9999;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 3rem;
	height: 3rem;
	padding: 0;
	border: 0;
	border-radius: 999px;
	background-color: #111;
	color: #fff;
	font-size: 1.25rem;
	line-height: 1;
	cursor: pointer;
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
	transform: translateY(0.5rem);
}

.back-to-top-button.is-visible {
	opacity: 0.9;
	visibility: visible;
	transform: translateY(0);
}

.back-to-top-button:hover,
.back-to-top-button:focus-visible {
	opacity: 1;
	outline: none;
}

.back-to-top-icon {
	display: block;
}