<div class="wrapper">
  <header id="header" class="header">
    <nav class="menu-navigation">
      <a href="#" class="menu-icon-toggle"><span></span></a>
      <i class="menu-background top"></i>
      <i class="menu-background middle"></i>
      <i class="menu-background bottom"></i>
      <ul class="menu">
        <li><a href="#">For Business</a></li>
        <li><a href="#">For Personal</a></li>
        <li><a href="#">Pricing</a></li>
        <li><a href="#">About</a></li>
        <li><a href="#">Contact</a></li>
      </ul>
    </nav>
  </header>
  <div class="content">
    <h1>Lorem Ipsum</h1>
  </div>
</div>

$indigo: #536dc8;
$danube: #6191d1;
$white: #fff;
$bermuda: #77D7B9;
body {
  background-image: linear-gradient(to left, $danube, $indigo);
  height: 100vh;
}

* {
  box-sizing: border-box;
}

@mixin center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.wrapper {
  @include center;
  width: 320px;
  height: 480px;
  padding: 1em;
  overflow: hidden;
  border-radius: 3px;
  background-color: $bermuda;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.menu-icon-toggle {
  display: block;
  width: 30px;
  height: 30px;
  position: relative;
  z-index: 9;
  .home & {
    top: 50px;
    position: absolute;
    right: 20px;
    top: 20px;
  }
  span {
    display: block;
    width: 100%;
    height: 2px;
    position: absolute;
    top: 50%;
    background-color: $white;
    transform: translate(0, -50%);
    transition: opacity 0.3s 0.3s;
    .home:not(.open) & {
      background-color: $white;
    }
  }
  &::before,
  &::after {
    content: '';
    display: block;
    width: 100%;
    height: 2px;
    position: absolute;
    background-color: $white;
    transition: transform 0.3s, top 0.3s 0.3s, bottom 0.3s 0.3s;
  }
  &::before {
    top: 6px;
  }
  &::after {
    bottom: 6px;
  }
  .open & {
    span {
      opacity: 0;
      transition: opacity 0.3s;
    }
    &::before,
    &::after {
      background-color: $danube;
    }
    &::before {
      top: calc(50% - 1px);
      transform: rotate(45deg);
    }
    &::after {
      bottom: calc(50% - 1px);
      transform: rotate(-45deg);
    }
    &::before,
    &::after {
      transition: top 0.3s, bottom 0.3s, transform 0.3s 0.3s;
    }
  }
}

.menu-background {
  visibility: hidden;
  width: 300%;
  height: 250px;
  position: absolute;
  left: -130%;
  background-color: $white;
  transition: background-position 0.5s, transform 0.5s 0.5s, visibility 0.5s 1s;
  .open & {
    visibility: visible;
    transition: background-position 0.5s, transform 0.5s 0.5s;
  }
  &.top {
    transform: rotate(-45deg) translateY(-150%);
    background: linear-gradient(to top, $danube 50%, $white 50%);
    background-size: 100% 200%;
    background-position: -100% 100%;
    .open & {
      transform: rotate(-45deg) translateY(-49%);
      background-position: 0 0;
    }
  }
  &.middle {
    transform: rotate(-45deg) translateY(50%) scaleY(0);
    background: $white;
    .open & {
      transform: rotate(-45deg) translateY(50%) scaleY(1);
    }
  }
  &.bottom {
    transform: rotate(-45deg) translateY(250%);
    background: linear-gradient(to bottom, $white 50%, $danube 50%);
    background-size: 100% 200%;
    background-position: 0 -100%;
    .open & {
      transform: rotate(-45deg) translateY(149%);
      background-position: 0 0;
    }
  }
}

.menu {
  @include center;
  visibility: hidden;
  list-style-type: none;
  margin: 0;
  padding: 0;
  z-index: 99999;
  .open & {
    visibility: visible;
  }
  li {
    opacity: 0;
    margin-bottom: 5px;
    transform: translateX(20px);
    transition: all 0.3s;
    $time-offset-close: 0;
    @for $i from 5 through 1 {
      &:nth-child(#{$i}) {
        $time-offset-close: $time-offset-close + 0.1;
        transition-delay: #{$time-offset-close}s;
        span {
          transition-delay: #{$time-offset-close}s;
        }
      }
    }
    .open & {
      opacity: 1;
      transform: translateX(0);
      backface-visibility: hidden;
      $time-offset-open: 1;
      @for $i from 1 through 5 {
        &:nth-child(#{$i}) {
          $time-offset-open: $time-offset-open + 0.1;
          transition-delay: #{$time-offset-open}s;
          span {
            transition-delay: #{$time-offset-open}s;
          }
        }
      }
    }
  }
  a {
    position: relative;
    font-size: 24px;
    text-decoration: none;
    color: $danube;
    &::before {
      content: '';
      display: block;
      height: 2px;
      width: 0;
      position: absolute;
      left: -30px;
      top: 50%;
      background-color: $danube;
      transform: translateY(-50%);
      transition: width 0.3s;
    }
    &:hover {
      &::before {
        width: 15px;
      }
    }
  }
}

.content {
  @include center;
  width: 100%;
  text-align: center;
  color: $white;
  transition: all 0.3s 1s;
  .open & {
    opacity: 0;
    transition: all 0.3s;
  }
}

$('.menu-icon-toggle').on('click', function(e) {
  $('body').toggleClass('open');

  e.preventDefault();
});