Override rmarkdown theme in order to change html page width

Question

I'm trying to widen the output of rmarkdown to html. I've been trying this solution with no success (although I'm using the cerulean theme, that should be responsive according to comments). Also tried adding a css element as described here - no effect.

How can I make this work?

Answer 1

Create a file styles.css with your styles:

<style>
.main-container {
  width: 100%;
    max-width: unset;
  }
</style>

And include it in your rmarkdown as described here:

---
output:
  html_document:
    css: styles.css
---

Both options work for me.