Selectors Reference Part 4

/*
  CSS Selectors
  - :not(Selectors)
  - :nth-child(n)
  - :nth-last-child(n)
  - :nth-of-type(n)
  - :nth-last-of-type(n)
*/

* {
  box-sizing: border-box;
  margin: 0;
}
body {
  font-family: Arial, Helvetica, sans-serif;
}