main{
    display: block;
    position: relative;
}

main a{
    display: inline-block;
    vertical-align: middle;
    margin: var(--marge);
    box-shadow: 0 0 20px rgb(186, 186, 186);
}

main a img{
    display: block;
    transition: .2s;
}

main a img:hover{
    filter: invert(1);
}