html, body, .container-fluid {
    max-width: 100%;
    min-height: 100%;

    overflow-x: hidden;
  }

  .inner-container {
    position: relative;
    max-width: 800px;

    margin-left: auto;
    margin-right: auto;

  }

  .fg-dark {
    color: #212121;
  }

  .viewer-outer {
    position: relative;

    height: 0;
    width: 90%;
    padding-top: 90%;

    margin-left: auto;
    margin-right: auto;
  }

  .image {
    position: relative;

    height: 0;
    width: 100%;
    padding-top: 100%;
    margin-top: -100%;

    margin-left: auto;
    margin-right: auto;

    background-size: contain;
    background-repeat: no-repeat;
    background-position: center center; 
  }

  .arrowbox {
    position: absolute; 
    
    left: 50%; 
    transform: translateX(-50%);
    width: 50%;
    max-width: 200px;

    visibility: hidden;
  }

  #mercury2-arrowbox {
    visibility: visible;
  }

  .fill-container {
    position: absolute;

    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  .viewer-scope {
    border: 3px solid white;
    border-radius: 50%;
    border-style: dotted;

    pointer-events: none;
  }

  #sun2-image {
    transform: translate(0, -130%) scale(5, 5);
  }

  @media (min-width: 450px) {
    #sun2-image {
      transform: translate(0, -170%) scale(5, 5);
    }
  }

  #sun2-title {
    position: relative;
  }

  #heading-row {
    position: absolute;
    z-index: 10;
    top: 0;
    left: 0;
    right: 0;
  }

  #heading-row.fg-dark h1, #heading-row.fg-dark p {
    text-shadow: 1px 1px lightgray;
  }

  .facebook-link {
    color: #3b5998;
    text-shadow: none;
  }

  .twitter-link {
    color: #1da1f2;
    text-shadow: none;
  }