html
<div id="shiny-shadow">
<button><span>Hover me</span></button>
</div>
CSS
#shiny-shadow {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
background: #1c2541;
}
button {
border: 2px solid white;
background: transparent;
text-transform: uppercase;
color: white;
padding: 15px 50px;
outline: none;
overflow: hidden;
position: relative;
}
span {
z-index: 20;
}
button:after {
content: '';
display: block;
position: absolute;
top: -36px;
left: -100px;
background: white;
width: 50px;
height: 125px;
opacity: 20%;
transform: rotate(-45deg);
}
button:hover:after {
left: 120%;
transition: all 600ms cubic-bezier(0.3, 1, 0.2, 1);
-webkit-transition: all 600ms cubic-bezier(0.3, 1, 0.2, 1);
}
