changedetection.io/changedetectionio/static/styles/parts/browser-steps.scss

#browser_steps {
  /* convert rows to horizontal cells */
  th {
    display: none;
  }

  li {
    list-style: decimal;
    padding: 5px;
    .control {
      padding-left: 5px;
      padding-right: 5px;
      a {
        font-size: 70%;
      }
    }
    &.empty {
      padding: 0px;
      opacity: 0.35;
      .control {
        display: none;
      }
    }
    &:hover {
      background: #eee;
    }
    > label {
      display: none;
    }
  }
}

#browser-steps-fieldlist {
  height: 100%;
  overflow-y: scroll;
}

#browser-steps .flex-wrapper {
  display: flex;
  flex-flow: row;
  height: 600px; /*@todo make this dynamic */
}

/*  this is duplicate :( */
#browsersteps-selector-wrapper {
  height: 100%;
  width: 100%;
  overflow-y: scroll;
  position: relative;
  //width: 100%;
  > img {
    position: absolute;
    max-width: 100%;
  }

  > canvas {
    position: relative;
    max-width: 100%;

    &:hover {
      cursor: pointer;
    }
  }

  .loader {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    margin-left: -40px;
    z-index: 100;
  }

  /* nice tall skinny one */
  .spinner, .spinner:after {
    width: 80px;
    height: 80px;
    font-size: 3px;
  }
}