personal-site/css/overlay.css

.overlay-container {
	position: relative;
	text-align: center;
	width: 100%;
}

.overlay-container .image {
	display: block;
	width: 100%;
	height: auto;
}

.overlay-container .overlay-mask {
	position: absolute;
	inset: 0;
	height: 100%;
	width: 100%;
	background-color: rgb(0 0 0 / 0%);
	color: rgb(0 0 0 / 0%);
	transition-property: color, background-color;
	transition-duration: 0.25s, 0.25s;
	transition-timing-function: ease-in-out;
}

.overlay-container:hover .overlay-mask {
	background-color: rgb(0 0 0 / 70%);
	color: rgb(255 255 255 / 100%);
}

.overlay-container .overlay-content {
	padding-left: 15%;
	padding-right: 15%;
	height: 100%;
	display: flex;
	flex-direction: column;
	justify-content: center;
	text-decoration: none;
}