main {
flex: 1 0 auto;

grid-area: main;
background-image: url(https://whistlerruns.com/nav/images/jonny-cass-Q4oN2CTw6GI-unsplash.jpg?2Cn4pQFibJ);
background-color: var(--color-nav);
background-blend-mode: multiply;
background-size: cover;
}