footer {
    position: fixed;
    -webkit-overflow-scrolling: touch;
    bottom: 0;
    right: 0;
    height: 100vh;

    pointer-events: none;
    z-index: 1000;    
    
    transform: translateX(0);

    transition: transform 500ms ease-in-out;
}

footer:not(.open) {
    transform: translateX(200px);
}

footer:before {
    content: "";
    position: fixed;
    -webkit-overflow-scrolling: touch;
    right: 0;
    bottom: 0;
    border-top: 400px solid transparent;
    border-right: 200px solid rgba(255,255,255, 0.65);
}

footer .logo {
    position: fixed;
    -webkit-overflow-scrolling: touch;
    bottom: 0;
    right: 0;
    padding: 17px;

    pointer-events: initial;
    z-index: 10;
}

footer .logo a {
    display: block;
}
    
footer .logo img {
    width: 120px;
    max-width: 120px;
    height: auto;
}