#content {
	margin: 5px auto;
	width: 20em;
}
#cards {
	display: grid;
	gap: 5px;
	grid-template-columns: repeat(4,1fr);
	width: 100%;
	perspective: 600px;
	font-size: 3em;
}

.card {
	cursor: pointer;
	border: 1px solid #666;
	/* display: inline-block; */
	text-align: center;
	transform-style: preserve-3d;
	transition: transform 0.6s;
	position: relative;
	width: 75px;
	height: 75px;
}

.card.flipped {
/* .card:hover { */
	transform: rotateY(180deg);
}

.card-face {
	position: absolute;
	width: 75px;
	height: 75px;
	text-align: center;
	backface-visibility: hidden;
	display: block;
}

.card-back {
	background-color: rgb(174, 174, 255);
}

.card-front {
	transform: rotateY(180deg);
	background-color: #fff;
}

#reset {
	/* background-color: #666; */
	/* color: #fff; */
	cursor: pointer;
	grid-column: 1 / span 4;
	padding: 1em;
	font-size: 1.25rem;
	text-align: center;
}