.bg-overlay {
    position: relative;
}

.bg-overlay::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55);
    z-index: 1;
}

.bg-overlay>* {
    position: relative;
    z-index: 2;
}