/* Here's a test */
html {
  /**
   * Images can be full URIs (dragging in another pretty large RFC), which can
   * *optionally* be quoted (why all this unneccessary optional stuff?)
   */
  background-image: url("path/to/image.png") !important;

  /* You can use named "counters" (what, there are no variables in CSS?!) */
  content: "Chapter " counter(my-chapter-counter) ". ";
  counter-increment: my-chapter-counter;      /* Add 1 to chapter */

  /**
   * Lists of font names (strings), separated by spaces and possibly quoted.
   * Also, a restricted set of specially-defined "generic font families"
   * like serif, fantasy(WTF) and monospace, and even a set of specially-defined
   * "system fonts" like status-bar, small-caption, icon and menu.
   */
  font-family: Helvetica, "Comic Sans MS", fantasy, small-caption;

  /**
   * Many different size types: em, ex, px, pt, in, cm, mm, percentage, unit-less.
   * In margins and paddings, you can provide 1, 2, 3 or 4 values which determine
   * how they expand into -top, -right, -bottom and -left.
   */
  margin: 1px 2em 30% 0;
}