.overlay {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    opacity: 1;
}

    .overlay-background {
        width: 100%;
        height: 100%;
        background-color: #000;
        background-image: url('../img/dark_overlay.jpg');
        background-repeat: no-repeat;
        background-position: center;
        background-size: cover;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 1;
        opacity: .83;
    }

    .lightbulb-wrapper {
        position: relative;
        z-index: 2;
    }

        .lightbulb {
            background-repeat: no-repeat;
            background-position: center;
            background-size: contain;
            background-image: url('../img/light_bulb_gray.png');
            width: 15vmin;
            height: 15vmin;
            margin-top: 5vmin;
            transform: rotate(180deg);
            cursor: pointer;
        }

            .lightbulb:hover {
                background-image: url('../img/light_bulb_yellow.png');
            }

@media(max-width: 800px), (max-height: 800px) {
    .lightbulb {
        width: 25vmin;
        height: 25vmin;
        margin-top: 10vmin;
    }
}