.MenuContainer
  input.HiddenCheckbox#menu(type="checkbox", name="menu")
  label.MenuIcon(for="menu")
  h2.MenuHeader Profile Menu
  nav.Menu
    ul.Menu-list
      li.Menu-item: a.Menu-link(href="https://codepen.io/rthor", target="_blank") Visit Profile
      li.Menu-item: a.Menu-link(href="http://rthor.is", target="_blank") Read Blog
      li.Menu-item: a.Menu-link(href="https://github.com/rthor", target="_blank") Checkout Code

@size-MenuIcon: 30px;
@width-MenuIcon: 6px;
@color-MenuIcon: #999;

.HiddenCheckbox {
  display: none;
}

.MenuContainer {
  display: inline-block;
  margin: 20px;
}

.MenuHeader {
  color: @color-MenuIcon;
  display: inline-block;
  float: left;
  font-weight: 100;
  line-height: @size-MenuIcon;
  margin: 0 0 0 @size-MenuIcon / 2;
  opacity: 0;
  position: relative;
  transform: translate3d(0, -@size-MenuIcon / 2, 0);
  transition: transform 0.6s, opacity 0.5s;
  z-index: 2;
}

.MenuIcon {
  cursor: pointer;
  display: block;
  float: left;
  height: @size-MenuIcon;
  position: relative;
  width: @size-MenuIcon;  
  z-index: 2;

  &::before {
    box-shadow: @color-MenuIcon 0 (@width-MenuIcon * 2) 0;
    height: @width-MenuIcon;
    transform-origin: left top;
    width: @size-MenuIcon;
  }
  
  &::after {
    bottom: 0;
    height: @width-MenuIcon;
    transform-origin: left bottom;
    width: @size-MenuIcon;
  }
}

.MenuIcon::before,
.MenuIcon::after {
  background: @color-MenuIcon;
  display: block;
  content: '';
  position: absolute;
  transition: box-shadow 0.2s linear, transform 0.4s 0.2s;
}

.Menu {
  background: #333;
  bottom: 0;
  left: -90%;
  position: absolute;
  top: 0;
  width: 90%;
  transition: left 0.4s;
}

.HiddenCheckbox:checked ~ .MenuHeader {
  opacity: 1;
  transform: none;
}

.HiddenCheckbox:checked ~ .MenuIcon {
  &::before {
    box-shadow: transparent 0 0 0;
    transform: rotate(45deg) translate3d(@width-MenuIcon, -@width-MenuIcon / 2, 0);
  }
  
  &::after {
    transform: rotate(-45deg)  translate3d(@width-MenuIcon, @width-MenuIcon / 2, 0);
  }
}


.HiddenCheckbox:checked ~ .Menu {
  left: 0;
}

.Menu-list {
  list-style-type: none;
  margin: @size-MenuIcon + 30px 0 0;
  padding: 0;
}

.Menu-item {
  margin: 0;
}

.Menu-link {
  color: #fff;
  display: block;
  overflow: hidden;
  padding: 8px 22px;
  position: relative;
  text-decoration: none;
  z-index: 1;
  
  &::before {
    background: #444;
    bottom: 0;
    content: '';
    left: 0;
    position: absolute;
    right: 100%;
    top: 0;
    transition: right 0.4s;
    z-index: -1;
  }
  
  &::after {
    content: attr(href);
    color: #fff;
    float: right;
    opacity: 0;
    transition: opacity 0.8s, transform 0.4s;
    transform: translate3d(100%, 0, 0);
  }

  &:hover::before {
    right: 0;
  }
  
  &:hover::after {
    opacity: 0.5;
    transform: translate3d(0, 0, 0);
  }
}