Button Hover Effect

<style>
.btn-primary {
	margin-top:150px;
    position: relative;
    z-index: 1;
    display: inline-block;
    padding: 0.875rem 2.25em 0.625rem;
    overflow: hidden;
    border: none;
    border-radius: 25px;
    background-color: #CEED54;
    color: #080808;
    font-size: 0.875rem;
    letter-spacing: 0.1175rem;
    line-height: 1.25rem;
    text-align: center;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: all 100ms ease-out;
}
.btn-primary:after {
    position: absolute;
    z-index: -1;
    bottom: 0;
    left: 50%;
    width: 200%;
    height: 150px;
    transform: translateZ(0) translate(-50%, 50%) scale(0);
    border-radius: 50%;
    background-color: #B2D235;
    content: '';
    transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.btn-primary:hover::after {
    transform: translateZ(0) translate(-50%, 50%) scale(1);
}
</style>

<button class="btn-primary">Vadivel</button>