Thanks for your comment Kaguya! 
it should in theory be easily collapsed into a single column layout, this was my intended design. https://files.catbox.moe/vxkg3u.png but eto blehh i might've not actually implemented it properly. idk how i forgot viewport in <head> lol.
i'll fiddle with it next time, thank you ~ <3
eyyyyyyyyy good site going on 
Mobile support is a little wonky. Add something like
<meta name="viewport" content="width=device-width, initial-scale=1">
in the head. This scales the content to fit phones better, by default it looks way too zoomed out. That being said when I checked how it'd look with it it was still a little odd, a little too much horizontal space. Ideally you should try collapsing everything into a single column.