/* Pop-up overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    margin: 0;
    display: flex;
    z-index: 25;
}

.overlay.hidden {
    display: none;
}

/* Background */
.overlay.shade {
    background-color: rgba(10, 10, 10, 0.75);
}

/* Content */
.overlay > div.center {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}