
/* botton quadrilux */
.btn {
	margin: 0;
	padding: 0;
	background: none;
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 200px;
	font-family: consolas;
}
.btn a {
	position: relative;
	display: inline-block;
	padding: 10px 20px;
	color: #2196F3;
	text-transform: uppercase;
	letter-spacing: 4px;
	text-decoration: none;
	font-size: 25px;
	overflow: hidden;
	transition: 0.2s;
}
.btn a:hover {
	color: #255784;
	background: #2196F3;
	box-shadow: 0 0 10px #2196F3, 0 0 40px #2196F3, 0 0 80px #2196F3;
	transition-delay: 1s;
}
.btn a span {
	position: absolute;
	display: block;
}
.btn a span:nth-child(1) {
	top: 0;
	left: -100%;
	width: 100%;
	height: 2px;
	background: linear-gradient(90deg, transparent,#2196F3);
}
.btn a:hover span:nth-child(1) {
	left: 100%;
	transition: 1s;
}
.btn a span:nth-child(3) {
	bottom: 0;
	right: -100%;
	width: 100%;
	height: 2px;
	background: linear-gradient(270deg, transparent,#2196F3);
}
.btn a:hover span:nth-child(3) {
	right: 100%;
	transition: 1s;
	transition-delay: 0.5s;
}
.btn a span:nth-child(2) {
	top: -100%;
	right: 0;
	width: 2px;
	height: 100%;
	background: linear-gradient(180deg, transparent,#2196F3);
}
.btn a:hover span:nth-child(2) {
	top: 100%;
	transition: 1s;
	transition-delay: 0.25s;
}
.btn a span:nth-child(4) {
	top: -100%;
	left: 0;
	width: 2px;
	height: 100%;
	background: linear-gradient(360deg, transparent,#2196F3);
}
.btn a:hover span:nth-child(4) {
	bottom: 100%;
	transition: 1s;
	transition-delay: 0.75s;
}
/* --- */

