Elements overlapping each other

First of all, hello to everyone. Been trying out Webflow for the last weeks and I’m very content with this tool. Learning new things everyday! However, there’s one problem I’m not able to solve yet… which is that there are elements that overlap each other on all devices smaller than a desktop. Does anyone know why this happens?

Here is my preview link:

Many thanks in advance and I look forward to contributing to the Webflow community.