.numberedtextarea-wrapper {
  position: relative;
}

.numberedtextarea-wrapper textarea {
  display: block;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

.numberedtextarea-line-numbers {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: none;
  width: 30px;
  overflow: hidden;
  color: #999;
  text-align: center;
  background-color: #fafafa;
  border-right: 1px dashed #eee;
}

.numberedtextarea-number {
  line-height: 20px;
}