as each of the properties of the shorthand:
top
: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise,auto
bottom
: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise,auto
left
: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise,auto
right
: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise,auto