CSS3

CSS3 the new standard cascading style sheet.
CSS3 has the best features in it as multiple column concept and 2D/3D Transformations.
The CSS3 also has all the features which are existing in older version of CSS.

Most of all the browsers supports CSS3 features.

CSS3 Borders

CSS3 Borders helps in rounded corner border of division or any section this is achieved using -moz-border-radius as follows

<div style="border:5px solid blue;-moz-border-radius:5px;height:100px;width:200px;background:yellow;color:red;">hello from rounded corner division</div>

Which results as follows

hello from rounded corner division

CSS3 Border Shadow
Border Shadow can be implemented to any border using -moz-box-shadow

<div style="border:5px solid blue;-moz-border-radius:5px;height:100px;width:200px;background:yellow;color:red;-moz-box-shadow:10px 15px 20px #ccc;">hello from shadow division</div>

Which results as follows

hello from shadowdivision