Front-end learning record!

CSS to control page layout and style

CSS rule declaration and composed by the selectors; declaration of attributes and values, each attribute value corresponds to a

selector {attribute1: val1; attribute2: val2;}

If a plurality of words to val sel {attribute: "ab c";}

If it is used in color RGB percentage of time even after the 0% 0% should be added 

id selector is: #