popup is not showing on product media just showing on product info

[digithub1]

i have added custom popup on my product page, where the quantity selectors are , but the popup isn't showing on whole screen it just displayed on product info side not on product image side i want my popup should show on whole screen equally.

[enam_ShopiDevs]

Hello

Can you give me the store URL so that I can check what is happening?

[digithub1]

https://jbcm4duybkfc1men-89568903473.shopifypreview.com
it's on the product page ,product name Wintip , its a Button when clickedon button popup opens button : FIIND MY SIZE

[enam_ShopiDevs]

Hello 

Please see the shot. You have added the modal markup under the button 

If you put this under the page parent markup like this 

It will show on whole page like this 

If you need coding help you can give me collaborator access, I will fix that for you.

Thank you

[digithub1]

can i share my code which i have added in custom liquid block? if that helps you out to solve the problems,
i want this to be above buy buttons, should i have to add code in backend , if it's to be in  backend where should i place the code?