It looks like you may have deleted the style.css file that was used as it had been uploaded to the Administrative File Uploader. What was the original subdomain that you changed from? I can check the backups for a copy.
Ok I've just checked with my sister who did the layout, she didn't panic like me about the layout falling apart She said the files will reference a folder in dkpfiles which is why it isn't showing up. She did delete the css recently it to upload a new version that references the new file locations of the images.
She's trying to upload the new one and it keeps getting stuck on the upload - this is using the Administrative File Uploader.
She said the files will reference a folder in dkpfiles which is why it isn't showing up. She did delete the css recently it to upload a new version that references the new file locations of the images. 
