.masthead{
    background-size: cover;
    min-height: 60vh;
    position: relative;
    /* color: white; */
    /* text-shadow: 2px 2px 2px rgba(0, 0, 0, .2); */
}

@media (max-width:500px){
    .masthead{
        min-height: 30vh;
    }
}