Hi BestWebSoft Support Team,
sure, here you go:
1. Adding class "cptch_task"
In our case (https://kullo.net/blog/how-we-benefited-from-the-cebit-2014/) I had to do relative positioning between the label and the Captcha task to fit in the style of the theme (derived from Twenty Eleven).
There might be other situations, where you want to be able to optionally access the Captcha task from CSS, like changing fonts.
2. Move br into the if-block
In case no Label-Text is set, there is no reason to follow
<p class="cptch_block"> with a linebreak, e.g.
<p class="cptch_block"><br />nine+9. This adds whitespace, that can not be removed via CSS.
Hope that helps!