jessica.css

section { 
  height: 100%;
  width: 100%;
  left:0;
  right: 0;
  top: 0;
  bottom: 0;
  position: absolute;
  background: linear-gradient(124deg, #29051c, #764278, #d768a1, #9b2449, #3c000a, #f05457, #d78081, #d7ae90, #e7cb9f);
  background-size: 1800% 1800%;
  -webkit-animation: rainbow 18s ease infinite;
  -z-animation: rainbow 18s ease infinite;
  -o-animation: rainbow 18s ease infinite;
    animation: rainbow 18s ease infinite;
  color: white;
  font-family: 'Open Sans', sans-serif;
}

main {
  width: 50%;
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  bottom: 0;
  margin: 0 auto;
  transform: translateY(-50%);
  text-align: justify;
}

footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: black;
  opacity: 0.3;
}

footer p, footer div {
  display: inline-block;
  padding: 0 10px;
}

footer p {
  margin: 0;
  padding: 0 10px;
}

.fab {
  font-size: 22px;
  padding: 0 3px;
}
@-webkit-keyframes rainbow {
    0%{background-position:0% 82%}
    50%{background-position:100% 19%}
    100%{background-position:0% 82%}
}
@-moz-keyframes rainbow {
    0%{background-position:0% 82%}
    50%{background-position:100% 19%}
    100%{background-position:0% 82%}
}
@-o-keyframes rainbow {
    0%{background-position:0% 82%}
    50%{background-position:100% 19%}
    100%{background-position:0% 82%}
}
@keyframes rainbow { 
    0%{background-position:0% 82%}
    50%{background-position:100% 19%}
    100%{background-position:0% 82%}
}