CSS is a rule based, declarative language. Where you define rules for specified groups of HTML elements
h1 {
color: red
font-size: 5em;
}
Selectors are used to group html elements together to apply style to.
The inner box is 90% - 30px.
IDs must be unique for each HTML page.
Lorem ipsum dolor sit amet.
Lorem ipsum dolor sit amet.
Lorem ipsum dolor sit amet.