.burger {
  display: inline-block;
  border: 0;
  background: none;
  outline: 0;
  padding: 0;
  height: 22px;
  cursor: pointer;
  border-bottom: 4px solid #fff;
  width: 28px;
  transition: border-bottom 1s ease-in-out;
  -webkit-transition: border-bottom 1s ease-in-out;
  right: 28px;
  top: 22px;
  position: absolute;
  color: #fff;
}
.burger::-moz-focus-inner {
  border: 0;
  padding: 0;
}
.burger:before {
  content: "";
  display: block;
  border-bottom: 4px solid #fff;
  width: 100%;
  margin-bottom: 5px;
  transition: -webkit-transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out, -webkit-transform 0.5s ease-in-out;
  -webkit-transition: -webkit-transform 0.5s ease-in-out;
}
.burger:after {
  content: "";
  display: block;
  border-bottom: 4px solid #fff;
  width: 100%;
  margin-bottom: 5px;
  transition: -webkit-transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out, -webkit-transform 0.5s ease-in-out;
  -webkit-transition: -webkit-transform 0.5s ease-in-out;
}

.burger-check {
  display: none;
}

.burger-check:checked ~ .burger {
  border-bottom: 4px solid transparent;
  transition: border-bottom 0.8s ease-in-out;
  -webkit-transition: border-bottom 0.8s ease-in-out;
}
.burger-check:checked ~ .burger:before {
  transform: rotate(-405deg) translateY(1px) translateX(-3px);
  -webkit-transform: rotate(-405deg) translateY(1px) translateX(-3px);
  transition: -webkit-transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out, -webkit-transform 0.5s ease-in-out;
  -webkit-transition: -webkit-transform 0.5s ease-in-out;
}
.burger-check:checked ~ .burger:after {
  transform: rotate(405deg) translateY(-4px) translateX(-5px);
  -webkit-transform: rotate(405deg) translateY(-4px) translateX(-5px);
  transition: -webkit-transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out, -webkit-transform 0.5s ease-in-out;
  -webkit-transition: -webkit-transform 0.5s ease-in-out;
}

.navigation {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.5s ease-in-out;
}

.burger-check:checked ~ .navigation {
  max-height: 500px;
  transition: max-height 0.5s ease-in-out;
}