Full width on a custom template using Brooklyn

Can anyone please help and guide me how to make the templates full width?

I tried all the codes that were online or got answered by experts still nothing work. Thank You

Here is the URL https://styphon.com/pages/slide

@Abdiqani

Your store is password Protected ! Please share store password .

Thanks!

Here is the password stealy$!

And here is a new URl https://styphon.com/pages/test I am trying to make the banner fit the whole page thank you.

@Abdiqani

Please share page temple or section file code becouse this is gride problem.

Thanks!

Here is a screenshot of the code

@Abdiqani

Please check following screenshot

@Abdiqani

Please check following screenshot