bones theme not so responsive

Good day everyone,

I am developing a theme that should be responsive (https://bodyarch.com/cardio-mission-season-1/), using the “bones” theme. It should be adaptable according to the screen width, so I added the adaptive-images script (https://adaptive-images.com/).

Two things I can’t figure out:
1- the adaptive images only work in some parts (but they don’t in the social icons, for example)

2- on smaller screens, the sidebar menu overlaps with the central picture.

I am sure I am doing a sum of stupid errors but really the theme at the moment is not responsive at all.

Thanks a lot for your support!