.github-corner {
    position: absolute;
    top: 0;
    border: 0;
    right: 0;
}

.github-corner svg  {
    fill: #151513;
    color: #fff;
}

.github-corner .octo-arm {
    -webkit-transform-origin: 130px 106px;
    transform-origin: 130px 106px
}

.github-corner:hover .octo-arm {
    animation: octocat-wave 560ms ease-in-out
}

@keyframes octocat-wave {
    0%, 100% {
        transform: rotate(0)
    }
    20%, 60% {
        transform: rotate(-25deg)
    }
    40%, 80% {
        transform: rotate(10deg)
    }
}

@media (max-width: 500px) {
    .github-corner:hover .octo-arm {
        animation: none
    }

    .github-corner .octo-arm {
        animation: octocat-wave 560ms ease-in-out
    }
}