HTML and CSS Reference
Figure 2.9. Our .media images floated left, but the bottom padding has failed to take effect
This is due to the float property. As discussed earlier in the section on clearing floats, a
parent element will expand vertically to contain only content that is non-floated. To fix this,
we would need to add our cf class to all the .media elements.
So to clear the floats here, we're going to use a different method—the overflow property
set to a value of " hidden ":