I am searching for a theme which enables to show category-wise blog post on various pages. You can check for the Menu reference here:
https://gyazo.com/95eed4b4047c555cd77e66ca3b32d997

My aim is to create the hierarchy as follows:
https://www.example.com/blog/dairy
https://www.example.com/blog/dairy/blog-post-dairy-1
https://www.example.com/blog/dairy/blog-post-dairy-2

https://www.example.com/blog/fruits
https://www.example.com/blog/fruits/blog-post-fruits-1
https://www.example.com/blog/fruits/blog-post-fruits-2

So I need a theme which enables me to show the category wise blog posts on the pages. I am not looking for any plugins. Because the plugin CSS overrides the theme’s CSS, which messes the look and feel of design.

Could anyone please help me?