octopug.pug

// This GitHub corner design courtesy of Tim Holman:
// https://github.com/tholman/github-corners

mixin octopug(link, bg, cat)
  - if (!bg) var fg = '#000'
  - if (!cat) var cat = '#fff'
  a(href=link class='github-corner' aria-label='View source on Github')
    svg(id='octocat' width='80' height='80' viewBox='0 0 250 250' aria-hidden='true')
      path(d='M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z')
      path(d='M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2' fill='currentColor' style='transform-origin: 130px 106px;' class='octo-arm')
      path(d='M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z' fill='currentColor' class='octo-body')
    
    style.
      #octocat {
        fill: #{bg};
        color: #{cat};
        position: absolute;
        top: 0;
        border: 0;
        right: 0;
      }
    
      .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
        }
      }