.overlay {
    width: 100%;
    height: 100%;
    position: fixed;
    inset: 0;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.40);
    transition: opacity 0.3s;
}

.overlay:not(.is-active) {
    opacity: 0;
    pointer-events: none;
}

.overlay.is-active {
    opacity: 1;
}