Increasing Size of Theme Along With Content

I’m trying to figure out how to increase the size of my theme with the increasing size of the content. I don’t want scrollbars within my content section, and when the content increases, I get overflow. How can I code it so my content section increases in size (along with the rest of the theme, so everything stays consistent). ?Here’s my current blog, this is what I DON’T want: https://thecrisisfilm.com/wordpress/blog/
This: https://www.nicekicks.com/ is an example of how I want my site to work. Any help?