[css] CSS two div width 50% in one line with line break in file

The problem is that if you have a new line between them in the HTML, then you get a space between them when you use inline-table or inline-block

50% + 50% + that space > 100% and that's why the second one ends up below the first one

Solutions:

<div></div><div></div>

or

<div>
</div><div>
</div>

or

<div></div><!--
--><div></div>

The idea is not to have any kind of space between the first closing div tag and the second opening div tag in your HTML.

PS - I would also use inline-block instead of inline-table for this