The customizer’s Additional CSS text area should be enough. You just need to get the selectors unique to a page.:)
WordPress pages add the post type and the page/post ID to the body tag’s class attribute, you can do it from there.
Example – https://share.getcloudapp.com/d5u6LKX1
I can use this to apply to this page specifically.
Example CSS:
body.page-id-2086 .wp-show-posts-entry-title {
font-weight: 700 !important;
}
This CSS specifically styles all WPSP titles inside body tag with class name page-id-2086
.
Since this particular class name is unique/added to this page only, it will only apply to this page.
-I would also need to increase the thickness of the border, (of the box).
try this CSS:
.wp-show-posts-inner {
border: 2px solid red;
}
Change the values to your preference.