/* only one blank line between */
menu { color: red }




navi { color: black }

/* automatically insert a blank line */
button { border: 1px } sidebar { color: #ffe }

/* always whitespace before { */
hidden{opacity:0%}

/* no blank lines inside ruleset */
imprint {
  color: blue;


    opacity: 0.5;

   font-size: small
}

/* before colon: no space, after colon: one space only */
footer {
      font-family:     Arial;

  float   :right;
  }
