How to Hide User Interface Elements

Do not use display: none to hide elements in Instant Chat. It is reserved by the Instant Chat Engine to hide or show elements. Instead, change the left and top coordinates of the elements to negative values, as shown in the following sample:

.ic_custom_logo /*<img>*/
  position: absolute;
  left: -100px;
  top: -100px;
  width: 78px;
  height: 32px;