How to drop a button vertically?

Question

HTML

joxi.ru/p27LXKkU0wgXZA
Guys how to drop the button vertically? only with html
PS button in table

Answer 1

If you need it using html tools for tables, then there is an attribute valign in tables for vertical alignment (see support). This is purely html'y way.
But you can add inline styles to the vertical-align: middle cell tag, kind of with html too :-D, because no need to include styles and select the element with selectors

Answer 2

1) You can combine the captcha and the button into one container, set display: inline-block for them; vertical-align: middle
2) You can set the container to display: flex; align-items: center;