CSS Code
.button {
margin: 0;
height: auto;
background: transparent;
padding: 0;
border: none;
cursor: pointer;
}
/* button styling */
.button {
--border-right: 6px;
--text-stroke-color: rgba(255,255,255,0.6);
--animation-color: #37FF8B;
--fs-size: 2em;
letter-spacing: 3px;
text-decoration: none;
font-size: var(--fs-size);
font-family: "Arial";
position: relative;
text-transform: uppercase;
color: transparent;
-webkit-text-stroke: 1px var(--text-stroke-color);
}
/* this is the text, when you hover on button */
.hover-text {
position: absolute;
box-sizing: border-box;
content: attr(data-text);
color: var(--animation-color);
width: 0%;
inset: 0;
border-right: var(--border-right) solid var(--animation-color);
overflow: hidden;
transition: 0.5s;
-webkit-text-stroke: 1px var(--animation-color);
}
/* hover */
.button:hover .hover-text {
width: 100%;
filter: drop-shadow(0 0 23px var(--animation-color))
}