.USA {
    display: flex;
    border: none;
    margin-top: 0;
    top: 150%;
    opacity: 0;
    visibility: hidden;
    transition: .5s;
    padding-left: 3px;
    margin-left: 3px !important;
}

.USA:hover {
    top: 100%;
    visibility: visible;
    transition: .5s;
    opacity: 1;
}

.myd {
    display:none;
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:#0008;
}
.test{
    background-color: pink!important;
}
.imgtest{
    display: flex;
    justify-content: center;
    align-items: center;
}