Head First html and css

This book advocates a clean separation between the structure of 
your pages and the presentation of your pages.
Today, serious web pages use HTML to structure their content, and CSS for style and 
presentation. Nineties-era pages often used a different model, one where HTML was used 
for both structure and style. This book teaches you to use HTML for structure and CSS 
for style; we see no reason to teach you outdated bad habits. 
We encourage you to use more than one browser with this book.
While we teach you to write HTML and CSS that are based on standards, you’ll still (and 

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probably always) encounter minor differences in the way web browsers display pages. So, 
we encourage you to pick at least two modern browsers and test your pages using them. 
This will give you experience in seeing the differences among browsers and in creating 
pages that work well in a variety of them. 
We often use tag names for element names. 
Rather than saying “the a element,” or “the ‘a’ element,” we use a tag name, like “the 

element.” While this may not be technically correct (because 

is an opening tag, not a 
full-blown element), it does make the text more readable, and we usually follow the name 
with the word “element” to avoid confusion. 
The activities are NOT optional. 
The exercises and activities are not add-ons; they’re part of the core content of the book. 
Some of them are to help with memory, some are for understanding, and some will help 
you apply what you’ve learned. Don’t skip the exercises. The crossword puzzles are the 
only things you don’t have to do, but they’re good for giving your brain a chance to think 
about the words in a different context.