Overflow spoils everything how to be (flex)?

Question

css

https://jsfiddle.net/z8gbqxno/
If: overflow: auto; for div.ticket , then everything will be fine, the blocks will be where they need to be, but if you enable it overflow: auto; Everything is moving.

Answer 1

Because the scrollbar is also wide and the content doesn't fit in 420 points.
Use for margin widths in the form %% or calc or flex on the parent.