#back-top {
    margin-bottom:1em;
    }

  .bron {
    margin-top: 0.2em;
    }

  .bron::before {
    content: url(block-gray.bmp);
    padding-right: 0.5em;
    }

  .title-1 {
    font-size: 14px;
    font-weight: bold;
    padding: 1.5em 0 0 22px;
    }

  .title-2 {
    font-size: 12px;
    font-weight: bold;
    padding: 1.5em 0 0 1.8em;
    }

  /* The actual timeline (the vertical ruler) */

  .timeline {
    position: relative;
    max-width: 1200px;
    margin-top: 1.5em;
    padding-top: 0.5em;
    }

  /* The actual timeline (the vertical ruler) */
  .timeline::after {
    content: '';
    position: absolute;
    width: 1px;
    background-color: lightgray;
    top: 0;
    bottom: 0;
    left: 66px;
    margin-left: -3px;
    }

  /* Container around content */
  .tl-container {
    position: relative;
    width: 800px;
    }

  /* The circles on the timeline */
  .tl-container::after {
    content: '';
    position: absolute;
    width: 5px;
    height: 5px;
    right: 0;
    background-color: white;
    border: 1px solid lightgray;
    left: -20px;
    top: 12px;
    border-radius: 50%;
    z-index: 1;
    }

  /* The actual content */
  .tl-content {
    border-radius: 8px;
    background-color: #F5F5F5;
    padding: 8px;
    position: relative;
    }

  .tl-content td:first-child {padding-right:0.5em;} 

  .tl-image {
    border: 1px solid lightgray;
    position: absolute;  
    top: 0;  
    bottom: 0;  
    left: 0;  
    right: 0;  
    margin: auto;
    max-height: 100%;
    max-width: 100%;
    }

  /* Place the container to the left */
  .tl-left {
    left: -2px;
    text-align: right;
    top: 10px;
    width: 50px;
    }

  /* Place the container to the right */
  .tl-right {
    left: 80px;
    top: -26px;
    }

  .tl-wrapper-1 {
    background-color: #F5F5F5;
    border-radius: 10px;
    border-radius: 10px;
    float: left;
    height: 100px;
    margin: 0 1em 1em 0;
    padding: 12px;
    position: relative;
    width: 100px;
    }

  .tl-wrapper-2 {
    background-color: #F5F5F5;
    height: 100%;
    position: relative;
    width: 100%;
    }