.masthead {
    min-height: 40rem;
}

img.thumpnail-medium {
    display: block;
    max-width:230px;
    max-height:150px;
    width: 250px;
    height: 150px;
}

.content-section {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
}

.row-header {
    padding-bottom: 2rem; 
}