footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: center;
  height: 50px;
  background-color: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  color: white;
  font-size: 12px;
  transition: transform 0.25s ease-in-out;
  transform: translateY(100%);
}