changing column width in rust for brittle?

[miscellanium]

i'm wanting to use this style and i'm not sure the creator is active currently so i was hoping someone here could help. i'm super rusty with css and hesitant to fiddle around too much, so could someone please point me in the right direction for making the entries column wider/more responsive?

alternatively, isn't there some code i could use to force images to fit within the column while still being the proper size if someone clicks through to view the individual entry?

it would also be super handy to have a box that lists top tags and titles of recent entries. where in the code would that element go?

any help for this noob would be much appreciated.