Why 
is that our first attempt at changing the color and font-weight failed? As we 
learned, it was because simply using the class name by itself had a lower 
specificity value and was trumped 
by the other selector which targeted the unordered list with the ID value. The 
important words in that sentence were 
class and 
ID. 
CSS applies vastly different specificity weights to classes and IDs. In fact, an 
ID has infinitely 
more specificity value! That is, no amount of classes alone can outweigh 
an ID.
Let's 
take a look at how the numbers are actually calculated: