.underline-animation {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.underline-animation:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: #bcaf10;
    bottom: -4px;
    left: 0;
    transition: width 0.3s ease-in-out;
}

.underline-animation:hover:after {
    width: 100%;
}