@media screen and (orientation: portrait) {
	* {
		--unit: 98vw;
		--padding: calc((100vh - var(--unit)) * .5);
	}
}

@media screen and (orientation: landscape) {
	* {
		--unit: 90vh;
		--padding: 5vh;
	}
}

* {
	margin: 0;
	--radius: calc(var(--unit) * .025);
}

body {
	overflow: hidden;
	margin: 0;
	padding-top: var(--padding);
	font-family: sans-serif;
	height: calc(100vh - var(--padding));
	background-image: url("../img/background.jpg");
	background-repeat: no-repeat;
	background-attachment: fixed;
	background-size: cover;
	background-color: #2E2E2E;
	width: 100vw;
}

.scene {
	overflow: revert;
	width: calc(var(--unit) * .8);
	height: var(--unit);
	border-radius: var(--radius);
	margin: auto;
	perspective: 600px;
}

.card {
	width: 100%;
	height: 100%;
	transition: transform 1s;
	transform-style: preserve-3d;
	cursor: pointer;
	position: relative;
	background-image: url("../img/card.jpg");
	background-repeat: no-repeat;
	background-attachment: fixed;
	background-size: cover;
	background-color: #DADADA;
	border: 1px solid black;
	border-radius: var(--radius);
}

.card.is-flipped {
	transform: rotateY(-180deg);
}

.card-face {
	position: absolute;
	width: 100%;
	height: 100%;
	text-align: center;
	font-weight: bold;
	font-size: 2.75rem;
	-webkit-backface-visibility: hidden;
	backface-visibility: hidden;

	display: flex;
	align-items: center;
	justify-content: center;
}

.card-text {
	margin: 0 2rem;
	line-height: 1.75;
}

#card-back {
	transform: rotateY(180deg);
}

.slider-container {
	padding-top: 1.75vh;
}

#reset-btn {
	position: absolute;
	bottom: 1rem;
	right: 1rem;
	color: #FFFFFF;
	font-size: 2rem;
	background: transparent;
	border: solid #FFFFFF .25rem;
	text-decoration: none;
	display: inline-block;
	cursor: pointer;
	text-align: center;
}