* {
	box-sizing: border-box;
}

body {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 100vh;
	overflow: hidden;
	margin: 0;
	background-color: #111111;
}

.back {
	position: absolute;
	top: 2vh;
	left: 5vw;
	color: white;
	font-size: 2rem;
}

button {
	cursor: pointer;
	background: linear-gradient(to bottom right, #b65eba, #2e8de1);
	color: white;
	border: none;
	font-size: 14px;
	text-transform: uppercase;
	letter-spacing: 2px;
	padding: 40px 70px;
	overflow: hidden;
	margin: 10px 0;
	position: relative;
}

button .circle {
	position: absolute;
	background-color: white;
	width: 100px;
	height: 100px;
	border-radius: 50%;
	transform: translate(-50%, -50%) scale(0);
	animation: scale 0.5s ease-out;
}

button:focus {
	outline: none;
}

@keyframes scale {
	to {
		transform: translate(-50%, -50%) scale(3);
		opacity: 0;
	}
}