.cover{background-size:cover}.contain{background-size:contain}@media screen and (min-width:30em){.cover-ns{background-size:cover}.contain-ns{background-size:contain}}@media screen and (min-width:30em) and (max-width:60em){.cover-m{background-size:cover}.contain-m{background-size:contain}}@media screen and (min-width:60em){.cover-l{background-size:cover}.contain-l{background-size:contain}}