 // vars
$color: #fff; // icon color
$blue: #158fef; // background color
$animation: 0.6s; // animation speed
$scale: 1; // icon scale 68/68 default
*,
*:before,
*:after {
  box-sizing: border-box;
}

html,
body,
div {
  height: 100%;
  margin: 0;
}

// spacing + background-color
body {
  background: $blue;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  width: 100%;
}

h4 {
  font-family: arial, helvetica, serif;
  color: $color;
  font-size: 18px;
  text-align: center;
}

#demo_container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hamburglar {
  display: flex;
  transform: scale($scale);
  position: relative;
  width: 68px;
  height: 68px;
  background: $blue;
  -webkit-touch-callout: none;
  user-select: none;
}

// transition mask
.path-burger {
  position: absolute;
  top: 0;
  left: 0;
  height: 68px;
  width: 68px;
  // two masks because... browser support.
  mask: url(#mask);
  -webkit-mask-box-image: url(https://raygun.io/upload/mask.svg);
}

.animate-path {
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 68px;
}

// what this does is create a small square that I then rotate behind an svg mask, giving the apparence of the line animating
.path-rotation {
  height: 34px;
  width: 34px;
  margin: 34px 34px 0 0;
  transform: rotate(0deg);
  transform-origin: 100% 0;
  &:before {
    content: '';
    display: block;
    width: 30px;
    height: 34px;
    margin: 0 4px 0 0;
    background: $color;
  }
}

// box rotation animation
@keyframes rotate-out {
  0% {
    transform: rotate(0deg);
  }
  40% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes rotate-in {
  0% {
    transform: rotate(360deg);
  }
  40% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

// offset moves
// dasharray is the dash size
// need to be able to control dash space size.
.hamburglar.is-open {
  .path {
    animation: dash-in $animation linear normal;
    animation-fill-mode: forwards;
  }
  .animate-path {
    animation: rotate-in $animation linear normal;
    animation-fill-mode: forwards;
  }
}

.hamburglar.is-closed {
  .path {
    animation: dash-out $animation linear normal;
    animation-fill-mode: forwards;
  }
  .animate-path {
    animation: rotate-out $animation linear normal;
    animation-fill-mode: forwards;
  }
}

.path {
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
  stroke-linejoin: round;
}

@keyframes dash-in {
  0% {
    stroke-dashoffset: 240;
  }
  40% {
    stroke-dashoffset: 240;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes dash-out {
  0% {
    stroke-dashoffset: 0;
  }
  40% {
    stroke-dashoffset: 240;
  }
  100% {
    stroke-dashoffset: 240;
  }
}

// All good burgers need filling!
.burger-icon {
  position: absolute;
  padding: 20px 16px;
  height: 68px;
  width: 68px;
}

.burger-container {
  position: relative;
  height: 28px;
  width: 36px;
}

.burger-bun-top,
.burger-bun-bot,
.burger-filling {
  position: absolute;
  display: block;
  height: 4px;
  width: 36px;
  border-radius: 2px;
  background: $color;
}

.burger-bun-top {
  top: 0;
  transform-origin: 34px 2px;
}

.burger-bun-bot {
  bottom: 0;
  transform-origin: 34px 2px;
}

//.burger-filling {
//  @include transition(all,($animation/2.5),ease-in-//out);
//}
// relative parent is the button
.burger-filling {
  top: 12px;
}

// burger ring container
.burger-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 68px;
}

.svg-ring {
  width: 68px;
  height: 68px;
}

// bun animations
.hamburglar.is-open {
  .burger-bun-top {
    animation: bun-top-out $animation linear normal;
    animation-fill-mode: forwards;
  }
  .burger-bun-bot {
    animation: bun-bot-out $animation linear normal;
    animation-fill-mode: forwards;
  }
}

.hamburglar.is-closed {
  .burger-bun-top {
    animation: bun-top-in $animation linear normal;
    animation-fill-mode: forwards;
  }
  .burger-bun-bot {
    animation: bun-bot-in $animation linear normal;
    animation-fill-mode: forwards;
  }
}

@keyframes bun-top-out {
  0% {
    left: 0;
    top: 0;
    transform: rotate(0deg);
  }
  20% {
    left: 0;
    top: 0;
    transform: rotate(15deg);
  }
  80% {
    left: -5px;
    top: 0;
    transform: rotate(-60deg);
  }
  100% {
    left: -5px;
    top: 1px;
    transform: rotate(-45deg);
  }
}

@keyframes bun-bot-out {
  0% {
    left: 0;
    transform: rotate(0deg);
  }
  20% {
    left: 0;
    transform: rotate(-15deg);
  }
  80% {
    left: -5px;
    transform: rotate(60deg);
  }
  100% {
    left: -5px;
    transform: rotate(45deg);
  }
}

@keyframes bun-top-in {
  0% {
    left: -5px;
    bot: 0;
    transform: rotate(-45deg);
  }
  20% {
    left: -5px;
    bot: 0;
    transform: rotate(-60deg);
  }
  80% {
    left: 0;
    bot: 0;
    transform: rotate(15deg);
  }
  100% {
    left: 0;
    bot: 1px;
    transform: rotate(0deg);
  }
}

@keyframes bun-bot-in {
  0% {
    left: -5px;
    transform: rotate(45deg);
  }
  20% {
    left: -5px;
    bot: 0;
    transform: rotate(60deg);
  }
  80% {
    left: 0;
    bot: 0;
    transform: rotate(-15deg);
  }
  100% {
    left: 0;
    transform: rotate(0deg);
  }
}

// burger filling
.hamburglar.is-open {
  .burger-filling {
    animation: burger-fill-out $animation linear normal;
    animation-fill-mode: forwards;
  }
}

.hamburglar.is-closed {
  .burger-filling {
    animation: burger-fill-in $animation linear normal;
    animation-fill-mode: forwards;
  }
}

@keyframes burger-fill-in {
  0% {
    width: 0;
    left: 36px;
  }
  40% {
    width: 0;
    left: 40px;
  }
  80% {
    width: 36px;
    left: -6px;
  }
  100% {
    width: 36px;
    left: 0px;
  }
}

@keyframes burger-fill-out {
  0% {
    width: 36px;
    left: 0px;
  }
  20% {
    width: 42px;
    left: -6px;
  }
  40% {
    width: 0;
    left: 40px;
  }
  100% {
    width: 0;
    left: 36px;
  }
}