body {
background: url('http://fc07.deviantart.net/fs70/f/2012/172/a/2/loli_wallpaper_by_wixzmaster-d549uyd.jpg') fixed;
}
#sidebar, .messages {
background: rgba(255, 255, 255, 0.9);
}
.mine .messages {
background: rgba(227, 248, 255, 0.9);
}
.username {
text-shadow: 1px 1px 2px rgba(0, 0, 0, .2);
}