The CSS IS APPLICABLE FOR ALL CHILD THEME OF VARIA THEME. CHILD THEMES ARE SHARED AT THE BOTTOM OF THE POST
Morden is a functional and responsive multi-purpose theme that is the perfect solution for your business’s online presence. You can see Modern theme demo here. It is actually the Child theme of Varia. So, if you want to use it in your hosting, then you need to use Varia theme as Parent theme.
So You can use my shared code and ask question in the comments section.
Attache by Press75 is a clean and stylish infinite scrolling theme, perfect for bloggers and storytellers. It features a Pinterest-like grid, uses unique layouts for supported post formats. Sticky posts in this theme are displayed at twice the size of regular posts, giving them an extra visual boost.
You can use my shared code and ask question in the comments section.