block.css 

#blocks tr.region-title td {
  font-weight: bold;
}
#blocks tr.region-message {
  font-weight: normal;
  color: #999;
}
#blocks tr.region-populated {
  display: none;
}
.block-region {
  background-color: #ff6;
  margin-top: 4px;
  margin-bottom: 4px;
  padding: 3px;
}
a.block-demo-backlink,
a.block-demo-backlink:link,
a.block-demo-backlink:visited {
  background-color: #B4D7F0;
  -moz-border-radius: 0 0 10px 10px;
  -webkit-border-radius: 0 0 10px 10px;
  border-radius: 0 0 10px 10px;
  color: #000;
  font-family: "Lucida Grande", Verdana, sans-serif;
  font-size: small;
  line-height: 20px;
  left: 20px; /*LTR*/
  padding: 5px 10px;
  position: fixed;
  z-index: 499;
}
a.block-demo-backlink:hover {
  text-decoration: underline;
}

File

drupal/modules/block/block.css
View source
  1. 

  2. #blocks tr.region-title td {

  3.   font-weight: bold;

  4. }

  5. #blocks tr.region-message {

  6.   font-weight: normal;

  7.   color: #999;

  8. }

  9. #blocks tr.region-populated {

  10.   display: none;

  11. }

  12. .block-region {

  13.   background-color: #ff6;

  14.   margin-top: 4px;

  15.   margin-bottom: 4px;

  16.   padding: 3px;

  17. }

  18. a.block-demo-backlink,

  19. a.block-demo-backlink:link,

  20. a.block-demo-backlink:visited {

  21.   background-color: #B4D7F0;

  22.   -moz-border-radius: 0 0 10px 10px;

  23.   -webkit-border-radius: 0 0 10px 10px;

  24.   border-radius: 0 0 10px 10px;

  25.   color: #000;

  26.   font-family: "Lucida Grande", Verdana, sans-serif;

  27.   font-size: small;

  28.   line-height: 20px;

  29.   left: 20px; /*LTR*/

  30.   padding: 5px 10px;

  31.   position: fixed;

  32.   z-index: 499;

  33. }

  34. a.block-demo-backlink:hover {

  35.   text-decoration: underline;

  36. }