create page-music-issue.php

based off essayist page
introduce clutchee font. music issue text banner for page. fittext and sizes.
#content margin should be padding to apply background styles
#content should have page-specific classes, not #main. make sure to be using first and last
compress css because it's huge
inheriting padding breaks layout
import some styles from darkmono
border-box all the things!
box styles
the query, the post
full width page header with opacity bar
masonry layout

not as advanced as i had hoped - set up function to output a gs class based on a custom field value, but this proved too difficult to implement (lots of maths)