#backToTop {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    cursor: pointer;
    padding: 10px;
    border-radius: 5px;
}
#backToTop:hover { background-color: #555; }

.table-wrapper {
  overflow-x: auto;
  display: block;
}

img[src$='#center']
{
    display: block;
    margin: 0.7rem auto; /* you can replace the vertical '0.7rem' by
                            whatever floats your boat, but keep the
                            horizontal 'auto' for this to work */
}

.img-comparison-slider-wrap {
  display: flex;
  justify-content: center;
}

.img-comparison-slider-wrap img-comparison-slider {
  max-width: 100%;
}