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.
Olsen is a stylish blogging theme WordPress created By CSSIgniter . You can check the Olsen theme demo . If you are using WordPress.com premium plan you can use this theme. It features a focused layout with crisp fonts, providing a fluid and relaxing reading experience. Its minimal design and unobtrusive color palette make it ideal for lifestyle and fashion bloggers who need their images to pop next to their content.
Here i am sharing css code to style your Olsen theme. So You can use my shared code and ask question in the comments section.