CSS Rules

Style

• Universal selection - *
• Type selection - span
• Class selector - . class
• ID selector - # id
• Attribute selector - selector[attr=value]
• combinators
• pseudo classes - selector:pseudo-class
• pseudo elements - selector::pseudo-element

OO rules

• Cascade - latter rule would overwrite the above
• Inheritance - child node would inherit certain properties
• Specificity
• !important