For anyone reading this, the solution that worked for me was the above link, mixed with putting:
<style>
#page{
Width:1100px;
}
</style>
In the <head> section of each page.
This is the final result:
https://collemeteo.it/index.phpThere's some altering of the width of each component in some cases like the forecast page, just search width in the code and you should see the ones that need to be changed.