Here is a simplification of my layout:
Content of unknown length
Content of unknown height
This should be a comment but I don't have enough reputation yet. The solution works, but visual studio code told me the following putting it into a css sheet:
inline-block is ignored due to the float. If 'float' has a value other than 'none', the box is floated and 'display' is treated as 'block'
So I did it like this
.spacer {
float: left;
height: 20px;
width: 200px;
}
And it works just as well.