/* All elements */
* {margin: .5em 1em;}

/*elements by type */
main {
border: 2px solid black;
padding: 1em;
}
h1 {
font-family: Arial, sans-serif;
}
p {
margin-left: 3em;
}
/* One element by ID */
#copyright {
font-size: 80%
}
/*Element by class*/
.blue {
color: blue;
}
.right {
text-align: right;
}