Class Base : The css used to redefine the elements of html is called as class base css.It is denoted by dot(.) before the name. The class based css file is using to multiple times of single document.
ex: ( .sample{color:#000;} )
Tag Base : The css used to apply for tag of html is called as tag base css. Tag base css is denoted with tags(body,img, ul, li,p,table,h1 to h6..etc)
ID Base : The css used to create block elements is called as ID base css. Alternative for creating table(cell) without html.It is denoted by (#)before the name. The ID based css file is using to single time of single document.
ex: #header,#banner etc.
