whats wrong with css
edit: also, can we talk about unneeded bloat? Those 5kb css files add up, how many tons are coal are burned every year because of all of those CSS files being downloaded over the internet?
(Betting 60% yes, 40% no)
"When you speak, it is silent. When you are silent, it speaks" - Zen Koan
theyre already including a favicon might as well swap that for a css file if youre worried about get requests or something
if you can set up a web server i am sure you could figure out enough to qualify for web 1.0 level complexity
if simplicity is the concern why not just host a text file? browsers format them nicely