pm_restrict.css

#pm-block-user-settings .sticky-header {
  /* Stop the remove button overlapping the sticky header */
  z-index: 10;
}
#pm-block-user-settings .throbber {
  margin: 4px 0;
}
#add-rule-button,
#remove-rule-button {
  height: 45px;
  /* Stop the remove button overlapping the sticky header */
  z-index: 1;
}
#add-rule-button label {
  line-height: 26px;
  margin-left: 2px;
}
#remove-rule-button {
  width: 100px;
  position: relative;
}
#remove-rule-button label {
  display: block;
  clear: both;
  text-align: center;
}
#add-rule-button input,
#remove-rule-button input {
  display: inline-block;
  overflow: hidden;
  width: 24px;
  height: 24px;
  padding: 0;
  margin: 0;
  border: 0;
  text-indent: -9999px;
  cursor: pointer; /* Hand shaped cursor */
  cursor: hand; /* for old versions of IE */
}
#add-rule-button input {
  background: transparent url('add-rule-button.png') left top no-repeat;
}
#remove-rule-button input {
  background: transparent url('remove-rule-button.png') left top no-repeat;
  /* Only way to centre-align remove button without having AHAH throbber
   * interfere with it */
  margin-left: 36px;
}