body{

    background-color: #000;
    color:#f1f0ed;

}
/* base styling */
.project-back {
    position: fixed;
    bottom: -150px; /* start off screen below */
    right: 80px;
    font-size: 1em;
    width: 150px;
    z-index: 10;
    cursor: pointer;
    transition: bottom 0.5s ease, transform 0.5s ease;
    will-change: transform, bottom;
    -webkit-filter: invert(100%); /* safari 6.0 - 9.0 */
    filter: invert(100%);
  }
  .project-back a {
    display: inline-block;
  }
  .project-back img {
    width: 150px;
    height: 150px;
    display: block;
  }