modal closing button positioning issue and mobile layout issue

[Shahil1]

Please fix my closing button position, and I want my mobile size guide to be like the square one that I have specified, and modal closure also needs to be addressed in mobile, and I don't want any sliders on mobile, everything should be shown clearly without the spacing issue.

[Shahil1]

this is my store link - https://df29qqb0rvblrij2-71576191201.shopifypreview.com