Animated-Form/buttonAnimation.css at master · sreeroop/Animated-Form · GitHub

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.button1{
	width: 200px;
}
.button2{
	width: 400px;
}
.button{
	position: relative;
	display: inline-block;
	justify-self: center;
    background: transparent;
    overflow: hidden;
    text-decoration: none;
	border: none;
	margin-left: 40px;
	color: tomato;
	font-size: 30px;
	padding: 10px;
	font-family: Verdana, Geneva, Tahoma, sans-serif;

}
.button:hover{
	background-color: tomato;
	color: #050801;
	box-shadow: 0 0 30px tomato;
	border-radius: 30px 5px ;
}
.button span{
    position: absolute;
	display: block;
}
.button span:nth-child(1)
{
	top: 0;
	left: -100%;
	height: 2px;
	width: 100%;
	background: linear-gradient(90deg,transparent,tomato);
	animation: anim1 1s linear infinite;
}
@keyframes anim1
{
	0%{
		left: -100%;
	}
	50%,100%{
		left: 100%;
	}
}
.button span:nth-child(2)
{
	top: -100%;
	right: 0;
	height: 100%;
	width: 2px;
	background: linear-gradient(180deg,transparent,tomato);
	animation: anim2 1s linear infinite;
	animation-delay: .25s;
}
@keyframes anim2
{
	0%{
		top: -100%;
	}
	50%,100%{
		top: 100%;
	}
}
.button span:nth-child(3)
{
	bottom: 0;
	right: -100%;
	height: 2px;
	width: 100%;
	background: linear-gradient(90deg,transparent,tomato);
	animation: anim3 1s linear infinite;
	animation-delay: .25s;
}
@keyframes anim3
{
	0%{
		right: 100%;
	}
	50%,100%{
		right: -100%;
	}
}
.button span:nth-child(4)
{
	bottom: -100%;
	left: 0;
	height: 100%;
	width: 2px;
	background: linear-gradient(180deg,transparent,tomato);
	animation: anim4 1s linear infinite;
	animation-delay: 0s;
}
@keyframes anim4
{
	0%{
		bottom: 100%;
	}
	50%,100%{
		bottom: -100%;
	}
}