.nav_toggle {
  position: absolute;
  z-index: 3;
  visibility: hidden;
  background-color: rgba(24, 24, 24, 0.4);
  top: 20px;
  left: 20px;
  cursor: pointer;
  border-radius: 50%;
  transition: background-color 0.15s linear;
}

.nav_toggle:hover {
  background-color: rgba(24, 24, 24, 1);
}

#nav_menu {
  display: block;
}

#nav_menu:focus {
  outline: none;
}

#nav_menu::after {
  z-index: -1;
  content: "";
  display: block;
  position: absolute;
  border-radius: 50%;
  width: 284vmax;
  height: 284vmax;
  top: -142vmax;
  left: -142vmax;

  background-color: black;

  transform: scale(0);
  transform-origin: 50% 50%;
  transition: all 0.5s cubic-bezier(0.755, 0.05, 0.855, 0.06);
  will-change: transform;
}

.nav:target > #nav_menu::after,
.nav--open > #nav_menu::after {
  transform: scale(1);
}

.menuicon {
  display: block;
  -webkit-transform: rotate(0deg);
  transform: rotate(0deg);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1), visibility 0ms;
  cursor: url("../cursors/blue.cur"), auto;
}

.nav--open .menuicon__bar,
.nav--open .menuicon__circle,
.nav--open .menuicon {
  color: #ff003a;
  animation: none;
}

.nav--open .menuicon:hover .menuicon__bar,
.nav--open .menuicon:hover .menuicon__circle {
  color: darkred;
}

.menuicon:hover .menuicon__bar,
.menuicon:hover .menuicon__circle {
  color: aqua;
  animation: none;
}

.menuicon__bar,
.menuicon__circle {
  animation: blinker infinite linear 2s alternate;
}

@keyframes blinker {
  0% {
    color: #0192ff;
  }

  20% {
    color: #00fff9;
  }

  40% {
    color: #6aff05;
  }

  60% {
    color: #fff000;
  }

  80% {
    color: #ffaa02;
  }

  100% {
    color: #ff003a;
  }
}

.menuicon__bar,
.menuicon__circle {
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: round;
  color: white;
}

.menuicon__bar {
  -webkit-transform: rotate(0deg);
  transform: rotate(0deg);
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  transition: -webkit-transform 0.25s ease-in-out;
  transition: transform 0.25s ease-in-out;
  transition: transform 0.25s ease-in-out, -webkit-transform 0.25s ease-in-out;
}

.menuicon__circle {
  transition: stroke-dashoffset 0.3s linear 0.1s;
  stroke-dashoffset: 144.513262038;
  stroke-dasharray: 144.513262038;
}

.nav:target .menuicon,
.nav--open .menuicon {
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
}

.nav:target .menuicon__circle,
.nav--open .menuicon__circle {
  stroke-dashoffset: 0;
}

.nav:target .menuicon__bar:nth-child(1),
.nav:target .menuicon__bar:nth-child(4),
.nav--open .menuicon__bar:nth-child(1),
.nav--open .menuicon__bar:nth-child(4) {
  opacity: 0;
}

.nav:target .menuicon__bar:nth-child(2),
.nav--open .menuicon__bar:nth-child(2) {
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
}

.nav:target .menuicon__bar:nth-child(3),
.nav--open .menuicon__bar:nth-child(3) {
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

.nav:target #nav_menu,
.nav--open #nav_menu {
  visibility: visible;
}

.nav:target .fade_down,
.nav--open .fade_down {
  opacity: 1;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

@media screen and (orientation: portrait) {
  .nav_toggle {
    visibility: visible;
  }

  #nav_menu {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 2;
    padding: 0;
    margin: 0;
    overflow: hidden;
  }

  .fade_down {
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.755, 0.05, 0.855, 0.06),
      visibility 0ms;
  }
}