styles are inherited. for ex. <p> inside <body> inherits styles of <body>
body { font-family: Arial, Helvetica, sans-serif; } // this will be inherited for all tags insidenot all sttributes are inherited, borders are not for ex.
.myClass {
color: red
}
...
<body class = "myClass">
<p></p> <!-- p will also have red color -->
</ body>
more concrete element more important