Hello Everyone,
I'm using:
- SharePoint Standard 2013.
- installed on Windows Server 2012 Standard
Now, I'd like to edit the following CSS file:
editmode15.css
http://www.MYSITE.XYZ/Style%20Library/de-DE/Themable/Core%20Styles/editmode15.css
But I cant find it on my physical drive.
I need this file because, my Custom MasterPage looks terrible on editing mode.
I know, I can change the System Master Page to Oslo or Seattle. But when I do so, the search result page is not my custom MasterPage.

My other CSS Styles in my Server File System:
C:\Program Files\Common Files\microsoft shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\1033\STYLES\corev15.css
Note:
C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\TEMPLATE\FEATURES\PublishingLayouts\en-us\editmode15.css <- Here is a editmode15.css, but it is not the same.
Thank you in advance.