@media screen and (min-width:900px) { html { background-image: url(https://relvokcor.xyz/~aerphanas/media/cde-Lattice.png); background-repeat: repeat; background-size: auto auto; } body { margin: 3em auto 3em auto; border: 0.3em solid black; font-size: large; } main { padding: 1em 1em 1em 1em; } }