1.css

* {
	padding: 0;
	margin: 0;
	font-family: 'Open Sans', sans-serif;
}

.container {
	width: 100%;
	min-height: 100vh;
	display: flex;
	justify-content: center;
	align-items: center;
	background: #fde1e1;
}

.card {
	width: 800px;
	height: 500px;
	position: relative;
	background: #fff;
	display: flex;
	flex-direction: column;
}

.card.active {
	display: none;
}

.content-top {
	width: 100%;
	height: 150px;
	background: #f95af9;
	display: flex;
	justify-content: center;
	align-items: center;
	user-select: none;
}

.content-top h1 {
	font-size: 50px;
}

.content-bottom {
	flex: 1;
	padding: 20px 70px;
	position: relative;
}

.content-bottom p {
	font-size: 18px;
	padding: 10px 0; 	
}


.content-bottom .answer {
	padding: 10px 0;
}

#btn {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 70px;
	background: purple;
	text-align: center;
	font-size: 25px;
	font-weight: 600;
	color: white;
	line-height: 65px;
	cursor: pointer;
	user-select: none;
}

#end {
	font-size: 30px;
	padding: 40px;
	text-align: center;
	display: none;
}

#end.active {
	display: block;
}