* {
	box-sizing: border-box;
}
body {
	min-height: 100vh;
	margin: 0;
	padding: 0;
	display: flex;
	justify-content: center;
	align-items: center;
}

/* 装飾 */
button {
	color: #fff;
	background: #5876a3;
	padding: 10px 30px;
	display: inline-block;
	border-radius: 5px;
	border: none;
	cursor: pointer;
}