/*
  CSS Selectors
  - *
  - Element => [p, div, h2]
  - Element OtherElement => div p
  - .class-name
  - #id-name
  - .parent .child
  - .class-one.class-two
  - .class-name div, .class-name p
  - Element.class-name => p.class-name
  - .parent > .child => Direct Child
*/

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