header.masthead {
    position: relative;
    background-color: #343a40;
    // background: url(../img/bg-masthead.jpg) no-repeat center center;
    background-size: cover;
    padding-top: 10rem;
    padding-bottom: 8rem;
    background-position: center center;

    .overlay {
        position: absolute;
        background-color: #212529;
        height: 100%;
        width: 100%;
        top: 0;
        left: 0;
        opacity: .3;
    }
}