hey Cosmin Ionut
Read some of my work on this page http://www.oxwall.org/forum/topic/5145?page=1#post-136541 and then get back with me here an I be glad to help out.
Wilson
hey Mad,
Ok your looking for user_standard_sign_in.html that's in ow_system_plugins/base/views/controllers
Using this bit of code:
<style>body { background-image: url('http://mydomain.com/images/back2.jpg');
background-attachment: scroll;
background-repeat: no-repeat;
background-size: 100%;
height: 100%;
width: 100%;
background-position: center top }
</style>
I placed it at the top of user_standard_sign_in.html and pressed save and it works fine. I saw in your code above you had " at the start of the code and " at the end of the code. That maybe why it looked the way it did. Not sure if that was in your coping...but try this bit of code in this post and see if you can get it working.
NOTE: Remember when you mod a page, it will be lost when you update the core...so make note of what your doing so you can repeat it again on updating the core.
Also again if you put that css code in ADMIN/ Settings/Main Setting/Page Settings/
"Custom head code" area and save it. Your image will be in all the pages as your background.
NOTE: If you put coding in the ADMIN/ Settings/Main Setting/Page Settings/
"Custom head code" that will not be lost on core updating.
As for the "Oxwall Software" copyright banner" you can go here to get rid of that >>> http://blog.oxwall.org/2013/02/donate-to-oxwall-development
Wilson