Theme kills my plugin when resizing window (CSS)

Hello friends.
My Theme has some CSS that is affecting elements that it should not affect.

In concrete, I am fighting with MrBlogger Theme + MP3 Sticky Player. The theme works fine in PC version using IE or Firefox or Chrome on 100% maximized window, and shows the player perfectly. But it does not display the player correctly in mobile version or in PC with resized window. This is because of CSS in MrBlogger (responsive?).

To prove that, I have tested MP3 Sticky Player in my mobile with “Twenty Twelve” theme, and it looks perfect too at any window size.

Also, I test MP3 Sticky Player in my mobile with “MP3 Sticky Player Demo theme”, and it looks perfect at any window size and in mobile too.

On the other hand, when I test MP3 Sticky Player with MrBlogger theme in a resized window on a PC and also in a smartphone, it looks bad (no buttons, no options, etc).

THIS is what I see in my mobile with MrBlogger Theme (resized windows in PC have a similar crazy look)

THIS is what I should see.

I confirm that i see the MP3 sticky player perfectly in Twentytwelve, or Twentyfourteen themes.

This is my website address : http://www.radioportbarcelona.es
Here is the player working in my website : http://www.radioportbarcelona.es/escuchanos

The CSS affected should be something like that :
transform: translate3d(0px, 0px, 0px);

Could anyone kindly tell me how to solve this, or pass me any CSS, or trick to solve this issue?
Thanks in advance for your support.