Hi Harny,
Please use this upgraded one having animation within it
.banner__buttons a{
background: transparent !important;
border: solid 1px white !important;
color: white !important;
mix-blend-mode: difference;
}
.banner__buttons a:hover{
color:#000 !important;
}
.banner__buttons a:after {
height: 100%;
background: #fff;
width: 0%;
transition: all .35s ease;
z-index: -1;
}
.banner__buttons a:hover:after {
width:100%
}
Thanks