index.less

#comic {
  position: relative;
  display: inline-block;
  outline: 2px solid black;
  overflow: hidden;
  user-select: none;

  .frame {
    background: white;
    transition: background-color .5s ease;

    &:focus {
      outline: none;
    }

    .content {
      opacity: 1;
      transition: opacity .5s ease;
    }

    &.loading {
      background: white;

      .content {
        opacity: 0;
      }
    }
  }

  .spinner {
    position: absolute;
    left: 50%;
    top: 45%;
    width: 50px;
    height: 52px;
    margin-left: -30px;
    margin-top: -26px;
    background-image: url('../../art/loading.png');
    background-size: contain;

    animation-name: rotate;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
    animation-duration: 2s;
    transform-origin: 56% 50%;
    @keyframes rotate {
      0% {
        transform: rotateY(0);
      }
      50% {
        transform: rotateY(360deg);
      }
      100% {
        transform: rotateY(0);
      }
    }
  }

  .spinner-text {
    font-size: 0;
    position: absolute;
    left: 50%;
    top: 53%;
    width: 91px;
    height: 17px;
    margin-left: -91px / 2;
    background-image: url('../../art/loading.gif');
    background-repeat: no-repeat;
  }

  .light {
    position: absolute;
    z-index: 200;

    .handle {
      position: absolute;
      transform: translate(-50%, -50%);

      &.position {
        width: 40px;
        height: 44px;
        background-image: url('../../art/light.png');
        background-size: contain;
      }

      &.rotate {
        width: 0;
        height: 0;
        background: transparent;
        border-left: 10px solid transparent;
        border-right: 10px solid transparent;
        border-top: 10px solid red;
      }

      &.color {
        width: 8px;
        height: 8px;
        background: black;
        border: 2px solid black;
        border-radius: 100%;
      }
    }

    &.selected:before {
      content: '';
      display: block;
      position: absolute;
      left: -40px;
      right: -40px;
      top: -40px;
      bottom: -40px;
      border: 2px solid red;
      border-radius: 100%;
      opacity: .75;
    }
  }

  .tools {
    position: absolute;
    right: 0;
    z-index: 100;

    button {
      display: block;
      width: 40px;
      height: 40px;
      padding: 0;
      margin: 10px;
      box-sizing: content-box;
      font-size: 0;
      color: transparent;
      background: #ddd;
      background-size: contain;
      border: 1px solid #333;
      border-radius: 3px;
      transition: opacity .15s ease;
      opacity: .75;

      &:hover {
        opacity: 1;
      }

      &:disabled {
        opacity: .25;
      }

      &.add-light {
        background-image: url('../../art/add-light.png');
      }

      &.remove {
        background-color: #d22;
        background-image: url('../../art/remove.png');

        &:disabled {
          background-color: #777;
        }
      }
    }
  }

  #data {
    width: 100%;
    height: 10em;
  }
}