.btn-label {
  position: relative;
  left: -12px;
  display: inline-block;
  padding: 6px 12px;
  background: rgba(0,0,0,0.15);
  border-radius: 3px 0 0 3px;
}

.btn-labeled {
  padding-top: 0;
  padding-bottom: 0;
}

.btn {
  margin-bottom: 10px;
}