Referencia Shorthand CSS (300c)
background: color url repeat|repeat-x|repeat-y|no-repeat scroll|fixed x y;
margin & padding: top right bottom left;
border: width solid|dashed|dotted|double color;
font: normal|italic|oblique normal|bold|100-900 font-size/line-height font-family;
list-style: disc|square|circle outside|inside url;
