@Adriana: The great thing about software development is that it's a meritocracy: nothing matters except your knowledge and skill. There's no personal politics in software development ... the computer discriminates against us all equally.
... to see if you can re-create it, or modify it, or just understand what and why they did what they did.
But yeah, perhaps I should create a series of "challenges" for HTML5 / CSS3 developers to learn specific techniques. Good idea.
Best wishes to you! Stick with it ... baby steps and patience. No one learns this stuff in a few days. It takes weeks, months, even years to master it a little at a time.