body{
    background: #EFEFEF;
}
.imagen{
    z-index: 1;
    filter: drop-shadow(0px 4px 4px rgba(0, 0, 0, 0.25));
    position: relative;
}
.boton{
    z-index: 3;
    position: relative;
    bottom:2vh;
    background: #EFEFEF;
    box-shadow: inset 0px 4px 4px rgba(0, 0, 0, 0.25);
}
.boton:hover{
    background: #1691c2;
    box-shadow: none;
    color: #fff;
}