i want to link to a css file in my html code which i put in my popup. Where do i need to put the css file on my server? i tried to put it in the wp-popup folder as well as in the css folder within the wp-popup folder - both didnt work.
thats how i linked it in the popup mask:
<link href="popup-styles.css" rel="stylesheet" type="text/css" />
Thank you !