attribute that creates a border around whatever unit it is applied to. Can be used with block and inline tags. "border" can accept 3 values: the width of
the border (in pixels or em), the color of the border, and the style of the border--for example "solid" or "dashed". These values can be coded
on one line, separated by spaces. They can be listed in any order.
:nth-child(even) :nth-child(odd)
CSS slector that will select the all of the even or all of the odd instances of a tag on a page and apply formatting to those items.
:first-of-type
CSS selector that will select the first instance of a tag on a page and apply formatting only to that instance.
:last-of-type
CSS selector that will select the last instance of a tag on a page and apply formatting only to that instance.