Puting the Model Into Production: Web Apps

I’m trying to adapt the html and css files of the “fastai v1 Web App on Render” to be mobile-friendly thanks to online guides like “How to Make a Mobile-Friendly Website: Responsive Design in CSS”.

It does help but at the end, there is still a problem: the Web app (the one from Jeremy as well, at least on my devices) works on Windows desktops and android smartphones but not on IOS Apple devices (notebooks, ipads and iphones). The problem comes from the Safari Web browser? Someone knows how to solve this issue? Thanks.