Making my website responsive when zooming out

Been creating a website for my company for the last few weeks and am steadily learning how Webflow works!

As a last step before publishing my website, I would like to make sure that all parts of my website are responsive, of course.

When zooming out on my website (desktop), my whole website cramps into the same place.
For example, the headings become stacked onto one line instead of keeping the same line height I have specified in the styles.

For a reference, please see my read only-link and zoom out (CTRL+Scroll down):

Here is my site Read-Only: LINK
(how to share your site Read-Only link)