.favourite {
    position: fixed;
    right: 100px;
    bottom: 0;
    padding: 10px 20px;
    color: #fff;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: 0.3s;
    -o-transition: 0.3s;
    transition: 0.3s;
    z-index: 1;
    text-decoration: none;
    background: var(--main-color);
    font-weight: 100;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

@media (min-width: 320px) and (max-width: 767px) {
    .favourite {
        right: 80px;
        padding: 10px;
    }
}

.favourite--open {
    visibility: visible;
    opacity: 0.6;
    -webkit-animation-duration: 1s;
    animation-duration: 1s;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
}

.favourite--open:hover {
    opacity: 0.9;
}