• descendant selector (space)
• child selector (>)
• adjacent sibling selector (+)
• general sibling selector (~)
  

element element div p Selects all <p> elements inside <div> elements
element>element div > p Selects all <p> elements where the parent is a <div> element
element+element div + p Selects the first <p> element that are placed immediately after <div> elements
element1~element2 p ~ ul Selects every <ul> element that are preceded by a <p> element

The overflow: property specifies whether to clip the content or to add scrollbars when the content of an element is too big to fit in the specified area.

The overflow: property has the following values:

• visible - Default. The overflow is not clipped. The content renders outside the element's box
• hidden - The overflow is clipped, and the rest of the content will be invisible
• scroll - The overflow is clipped, and a scrollbar is added to see the rest of the content
• auto - Similar to scroll, but it adds scrollbars only when necessary

• left - The element floats to the left of its container
• right - The element floats to the right of its container
• none - The element does not float (will be displayed just where it occurs in the text). This is default

The opacity property can take a value from 0.0 - 1.0. The lower value, the more transparent