How to make the site display the same at different resolutions of the same monitor?

Question

css

How to make the site display the same at different resolutions of the same monitor? We are talking about the physical size
Ie, for example, a column half the width of the monitor. The font height measured with a ruler at the monitor is the same.
Is it all in percentages? Bootsrap 3 is ok?

Answer 1

Yes, Bootstrap will do.