div.block-nodeblock.with-block-editing {
  position: relative;
}

div.block.block-nodeblock.with-block-editing div.edit {
  display: none;
  position: absolute;
  right: 0; /* LTR */
  top: 0;
  z-index: 40;
  border: none;
  padding: 0;
  font-size: 1em;
  background-color: #fff;
}

div.block.block-nodeblock.with-block-editing:hover div.edit {
  display: block;
}

div.block.block-nodeblock.with-block-editing .edit a {
   background: #333;
   border: 3px solid #333;
   color: #FFF;
   display: block;
   padding: 2px 7px;
   text-decoration: none;
   text-transform:uppercase;
}
div.block-nodeblock.with-block-editing .edit a:hover {
   background: #24B3FF;
}