.wise-btn--back-to-top {
    position: fixed;
    bottom: var(--pad);
    right: var(--pad);
    z-index: 1000;
    border: none;
    background: var(--accent);
    color: var(--accent-ink);

    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all .3s ease;
}

.wise-btn--back-to-top:hover {
    filter: brightness(1.2);
    background: var(--accent);
    color: var(--accent-ink);
}

.wise-btn--back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}