.footer-arrow {
    transform: scale(0);
    position: sticky;
    top: 85vh;
    bottom: 6vh;
    left: 94vw;
    z-index: 99;
    transition: transform .25s cubic-bezier(0.4, 0, 1, 1);
    background-color: var(--color-white);
    border: 1px solid var(--color-copper);
    color: var(--color-copper);
    font-size: 12px;
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-right: 20px;
}

.footer-arrow.show {
    transform: scale(1) translateY(50%);
}

a.footer-arrow:hover,
a.footer-arrow:focus {
    background-color: var(--color-copper);
    color: var(--color-white);
}

a.footer-arrow:hover .icon-cmvm {
    animation: shift-vertical 0.4s cubic-bezier(0.455, 0.030, 0.515, 0.955) both;
}

@keyframes shift-vertical {
    0% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
    50% {
    -webkit-transform: translateY(-250%);
            transform: translateY(-250%);
            opacity: 0;
  }
    51% {
    -webkit-transform: translateY(250%);
            transform: translateY(250%);
            opacity: 0;
  }
    100% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
            opacity: 1;
  }
}