Theming

Inherit your site's theme from some base theme. Most popular base themes:

• Zen
• Omega
• Bootstrap
• AdaptiveTheme

Follow CSS formatting guidelines. Also see CSS architecture, CSS file organization and SMACSS.

Make sure your theme adds block-[module]-[delta] class to blocks to avoid usage of IDs in CSS selectors.
For styling needs also add more classes to blocks via Block Class module, add more classes and customize markup in Views via Views UI.

@todo CSS preprocessors, postprocessors, etc.