The layout is decent and not unfriendly on mobile (please consider that praise; I am a cranky mobile site hater). I'm not sure how much you can control vs what whatever template/engine you are using restricts, but here are couple of suggestions:
- Navigating to a new page briefly passes through some kind of light blue loading screen. The color is bright enough that it is a bit of a jumpscare in dark mode and (for me) unpleasant. If possible, you may want to adjust it to follow the theming or remove it.
- The light/dark mode switch occasionally obscures a few chars of text. It is not a huge problem but may be better served in the header toolbar or hamburger menu.
- In my experience, a lot of people prefer dark mode to light, a preference more substantial for photosensitive folks; consider making dark the default.
- All of the links in the footer are broken.