html,
body {
  width: 100vw;
  height: 100vh;
  padding: 0;
  margin: 0;
  background-color: #121314;
  overflow: hidden;
}

input {
  display: none;
}

.grid {
  display: grid;
  grid-template-rows: 1fr 1fr;
  grid-template-columns: 1fr 1fr;
  width: 100vw;
  height: 100vh;
  position: absolute;
}

.grid>* {
  position: relative;
}

label {
  display: block;
  cursor: pointer;
  position: absolute;
  width: 50vw;
  height: 50vw;
  max-width: 150px;
  max-height: 150px;
  overflow: hidden;
}

@media (min-aspect-ratio: 1/1) {
  label {
    width: 50vh;
    height: 50vh;
  }
}

.menu--1 label,
.menu--2 label {
  bottom: 0;
}

.menu--3 label,
.menu--4 label {
  top: 0;
}

.menu--1 label,
.menu--3 label {
  right: 0;
}

.menu--2 label,
.menu--4 label {
  left: 0;
}

path {
  fill: none;
  stroke: #ffffff;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  --length: 24;
  --offset: -38;
  stroke-dasharray: var(--length) var(--total-length);
  stroke-dashoffset: var(--offset);
  transition: all .8s cubic-bezier(.645, .045, .355, 1);
}

circle {
  fill: #fff3;
  opacity: 0;
}

label:hover circle {
  opacity: 1;
}

.cross input:checked+svg .line--1,
  .cross input:checked+svg .line--3 {
    --length: 22.627416998;
  }

.cross input:checked+svg .line--2 {
    --length: 0;
  }

.back input:checked+svg .line--1,
  .back input:checked+svg .line--3 {
    --length: 8.602325267;
  }

.menu--1 {
  background-color: #3f77e9;
}

.menu--1 .line--1,
  .menu--1 .line--3 {
    --total-length: 126.64183044433594;
  }

.menu--1 .line--2 {
    --total-length: 70;
  }

.menu--1 input:checked+svg .line--1,
    .menu--1 input:checked+svg .line--3 {
      --offset: -94.1149185097;
    }

.menu--1 input:checked+svg .line--2 {
      --offset: -50;
    }

.menu--2 {
  background-color: #0095f9;
}

.menu--2 .line--1,
  .menu--2 .line--3 {
    --total-length: 111.22813415527344;
    --offset: -50.22813415527344;
  }

.menu--2 .line--2 {
    --total-length: 99;
  }

.menu--2 input:checked+svg path {
      transform: translateX(30px);
    }

.menu--2 input:checked+svg .line--1,
    .menu--2 input:checked+svg .line--3 {
      --offset: -16.9705627485;
    }

.menu--2 input:checked+svg .line--2 {
      --offset: -20;
    }

.menu--3 {
  background-color: #00aef6;
}

.menu--3 .line--1,
  .menu--3 .line--3 {
    --total-length: 126.38166809082031;
  }

.menu--3 .line--2 {
    --total-length: 80;
  }

.menu--3 input:checked+svg .line--1,
    .menu--3 input:checked+svg .line--3 {
      --offset: -109.1770175568;
    }

.menu--4 {
  background-color: #18bee5;
}

.menu--4 .line--1,
  .menu--4 .line--3 {
    --total-length: 103.35061645507812;
    --offset: -42.35061645507812;
  }

.menu--4 .line--2 {
    --total-length: 99;
  }

.menu--4 input:checked+svg path {
      transform: translateX(31px);
    }

.menu--4 input:checked+svg .line--1,
    .menu--4 input:checked+svg .line--3 {
      --offset: -8.602325267;
    }

.menu--4 input:checked+svg .line--2 {
      --offset: -7;
    }

.debug {
  display: none;
}

.line--debug {
  opacity: 0;
  stroke-dasharray: none;
}

@media screen and (min-width: 800px) {
  .debug {
    opacity: 0.8;
    display: block;
    position: absolute;
    z-index: 1;
    font-family: sans-serif;
    transform: rotate(-45deg);
    transform-origin: 0% 100%;
    background: #000;
    color: #fff;
    width: 150px;
    height: 100px;
    line-height: 150px;
    text-align: center;
    user-select: none;
  }
    .debug:hover {
      opacity: 1;
    }
    .debug.active {
      background: #fff;
      color: #000;
    }

  .debug.active+.grid path.line--debug {
    opacity: .2;
  }
}