header nav ul li {
    position: relative;
}
header nav li a{
    display: flex;
    align-items: center;
    height:100%;
}
header nav li.dw a {
    transition: all .3s;
}
header nav li.dw ul {
    position: absolute;
    top: 70px;
    z-index: 4;
    visibility: hidden;
    opacity: 0;
    transition: all .3s;
    background-color: rgb(16, 18, 50, 0.8);
}
header nav li.dw:hover > ul, nav li.dw ul li:hover > ul, nav li.dw:active > ul, nav li.dw ul li:active > ul {
    visibility: visible;
    opacity: 1;
}
header nav li.dw ul li a{
    padding:10px 25px;
    white-space: nowrap;
}