I hope I'm posting this message in the right category. If not, don't hesitate to move it.
I have recently decided to customize my skin and, to do so, I have created a child theme. Everything went well until I tried to edit my child's theme style.css file. Though the child's style.css has content, I realized I was unable to edit it in the theme editor, because this css content isn't displayed, for a reason I can't understand. This problem seems to occure only with my child theme.
Indeed, this is how it looks when I try to edit the child theme's CSS file : http://img15.hostingpics.net/pics/832202Capturedcran20140324131112.png
Though everything looks normal when I try doing it with the parent theme : http://img15.hostingpics.net/pics/570746Capturedcran20140324131208.png
Also, I recently met another problem : when I am on the "Manage themes" global page, in the admin panel, I can't anymore display the themes infos by clicking on the thumbs, or anywhere else.
In fact, everything looks normal on the page (as you can see it here : http://img15.hostingpics.net/pics/123596Capturedcran20140324131307.png ) but when I click on the a theme, the "details window" doesn't appear anymore, and here is the only change : http://img15.hostingpics.net/pics/429483Capturedcran20140324131314.png (some text appears ("Details of the theme"), but nothing else).
Regarding those two problems, may I ask you if you know what could be their origin, and request your help ?
I am using the last version of WP (3.8.1), my parent theme is Vantage, and here is the link to my website : http://www.amitabha-sat.com (the website is still not finished).
Many thanks in advance, and sorry for my approximative english ! :)