.css_btn_class {
	font-family:'Lucida Grande','Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN W3', 'Meiryo', 'メイリオ', 'sans-serif';
	font-size:40px;
	position:relative;
	text-decoration:none;
	display: inline-block;
	margin:20px 15px;
	padding:20px 15px;
	background-color: #333;
	border: 2px solid #333;
	color: #fff;
	text-align: center;
	line-height: 50px;
	width: 80px;
}
.css_btn_class:hover {
	background-color: #fff;
	border-color: #59b1eb;
	text-align: center;
	text-decoration: none;
	outline: none;
	color: #59b1eb;
}
.css_btn_class::before,
.css_btn_class::after {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	-webkit-transition: all .3s;
	transition: all .3s;
}