body {
	margin: 0;
}
p {
	margin: 0 0 1em;
}
.contents {
	max-width: 630px;
	margin: 0 auto;
	padding: 20px;
	background: #f2f2f2;
}
.title {
	font-weight: bold;
}
.btn-twitter {
	display: inline-block;
	padding: 5px 10px 5px 40px;
	margin: 0;
	background-color: #1da1f2;
	color: #fff;
	font-size: 1.2rem;
	position: relative;
	text-decoration: none;
	border-radius: 5px;
}
.btn-twitter:before {
	position: absolute;
	content: '\f099';
	font-family: 'Font Awesome 5 Brands';
	font-weight: 400;
	top: 50%;
	left: 10px;
	transform: translateY(-50%);
	font-size: 1.4rem;
}
.icon-twitter {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 40px;
	height: 40px;
	background-color: #1da1f2;
	border-radius: 50%;
	color: #fff;
	font-size: 1.4rem;
	text-decoration: none;
}

.copyright {
	text-align: center;
	padding-top: 2em;
	font-size: 14px;
}