Border content Area

Hello I’m back again long time no see. My question is about the content area when you look at the website: you will see that on both side and top and bottom of the content area there is a thin grey line. Is it possible to remove this line or make it invisible.
Regards WIMA

sorry wrong site url I forgot the slashes :

Hello there,

I hope you are doing well today.

You can use the following CSS code to remove the shadow by going to Appearance > Customize > Additional CSS and pasting it there.

/*Article Shadow Removal*/
article {
    box-shadow: none;

Best Regards,