.overlay-menu {
    position: fixed;
   top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background-color: #d9f0f9;
}
.overlay-menu nav, .overlay-menu ul {
    width: 100%;
}
 .overlay-menu ul {
     min-height:70vh;
     padding-top: 10vh;
     padding-bottom: 10vh;
     display: grid;
     grid-template-columns: 100%;
}
.overlay-menu ul li {
    margin: auto;
}
.overlay-menu ul li.important {
    font-size:18px;
    font-weight: bold;
}
.overlay-menu ul li:not(.important) {
    font-size:14px;
    font-weight: bold;
}
.overlay-menu {
    display: grid;
    grid-template-columns: 1fr;
}
.overlay-menu > * {
    margin: auto;
}
.overlay-menu > * a {
    color:var(--color_darkest);
}
.overlay-menu > * a:hover {
    color: var(--color_highlights);
}