.partitioned {
  display: block;
  padding-left: 15px;
  letter-spacing: 25px;
  border: 0;
  background-color: transparent;
  background-image: linear-gradient(to left, black 70%, rgba(255, 255, 255, 0) 0%);
  background-position: bottom;
  background-size: 32px 1px;
  background-repeat: repeat-x;
  background-position-x: 0px;
  width: 350px;
  height: 50px;
  min-width: 220px;
  outline:none;
  position: absolute;
  z-index: 2;
}

.backdrop {
  overflow: auto;
  background-color: #fff; /* or whatever */
  position: absolute;
  z-index: 1;
  width: 335px;
  height: 30px;
  overflow: hidden;
  white-space: nowrap;
  
}

.highlights {
  padding-left: 7px;
  color: transparent;
  letter-spacing: 5px;
  overflow: hidden;
  white-space: nowrap;
}

.correct {
  color: transparent;
  background-color: #d4e9ab; /* or whatever */
  width: 30px;
}

.incorrect {
  color: transparent;
  background-color: #ff6961; /* or whatever */
  width: 30px;
}

.checkerInner{
  left: 0;
  position: sticky;
  display: block;
  height: 50px;
}

.checkerOuter{
  width: 330px; 
  height: 50px;
  overflow: hidden;
  display: block;
  
}