Hi Céline-
Thanks for reaching out, and thanks for using the Diced WordPress theme.
Taking a look at the site, it looks like the main problem is the two buttons, “Click & Collect Paris 17ème & Livraison en direct,” and “Commander sur Deliveroo” aren’t wrapping to a second line on smaller screens.
You should be able to fix this with a little bit of Custom CSS. Navigate to Customize > Advanced > Custom JS & CSS and paste these lines into your Custom Theme CSS:
span#glfButton0 { white-space: break-spaces; }
a.btn.btn-3d.btn-rounded.btn-color-1.btn-jumbo { white-space: break-spaces; height: unset;}