when you see CSS like this
HTML Code:
div.post-headline h1,div.post-headline h2 {
margin:0;
padding:0;
padding:0;
margin:0;
font-size:110%;
font-weight:bold
}
it's just short hand inplace of coding this
HTML Code:
div.post-headline h1 {
margin:0;
padding:0;
padding:0;
margin:0;
font-size:110%;
font-weight:bold
}
div.post-headline h2 {
margin:0;
padding:0;
padding:0;
margin:0;
font-size:110%;
font-weight:bold
}
it's combining the CSS selectors that use the same rules