span.cblock {
  border-radius: 2px;
  background-color: #F3F3F3;
  padding: 3px;
  margin: 3px;
  font-size: 12pt;
}

textarea#paste {
  width: 50%;
  height: 300px;
}

pre code {
  background-color: #777777;
}

/* imgbin */
div.img-preview {
  margin: 5px;
  display: inline-block;
  vertical-align: top;
}