Flash of un-styled content

Hi,
Your module is pretty awesome, however i have a little problem, while loading my page for the first time, i have a tiny moment when the css is not yet applied to the html so i can see all the html element without css.
My application is very simple: it has only one module named Homepage that load the homepage of the site.
-> I inject the homepage.css in the stateProvider in the config/homepage.js which is the first file to be load of the module Homepage.
-> In terms of timing the site takes about 550ms to completely load.
-> The homepage.css is load at about 450ms and the homepage.html is load at 550ms. So the css is load about 100ms before the html however i always have this moment without css.

Do you have any ideas how to fix this?
Thanks