.diff-sample .viewer {
  display: inline-block;
  width: calc(100% - 330px);
  height: calc(100% - 60px);
  margin-top: 60px;
  margin-left: 5px;
  -webkit-box-shadow: 1px 1px 10px #999;
  box-shadow: 1px 1px 10px #999;
}

.diff-sample#viewers {
  margin-left: 325px;
  display: flex;
  width: 100%;
}

@media (max-width: 800px) {
  .diff-sample .viewer:first-child {
    margin-top: 60px;
  }

  .diff-sample .viewer {
    margin-top: 10px;
    width: 100%;
    height: 90%;
    -webkit-box-shadow: 1px 1px 10px #999;
    box-shadow: 1px 1px 10px #999;
  }

  .diff-sample#viewers {
    padding: 15px 15px 0px 15px;
    margin-left: 0px;
    display: flex;
    flex-wrap: wrap;
    width: 100%;
  }
}

.opacity-slider, .alignment-button {
  margin-left: 18px;
}

.configuration-item {
  margin-bottom: 15px;
}