body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100vh;
  background: radial-gradient(#0a2a43 30%, #09243a);
  font-family: 'Asap', sans-serif;
}
body:after {
  content: '';
  display: block;
  position: absolute;
  top: 1rem;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  border: 4px solid #071c2d;
  border-radius: 2px;
  background: none;
  pointer-events: none;
}

.label {
  flex: 0;
  color: #b8c5d0;
  letter-spacing: .04em;
  text-align: center;
  margin-bottom: 2rem;
  font-size: 3rem;
}
@media screen and (min-width: 60rem) {
  .label {
    font-size: 5vw;
  }
}

.checkbox-wrap {
  flex: none;
  position: relative;
  width: 10%;
  min-width: 8rem;
  z-index: 1;
}
.checkbox-wrap:after {
  content: '';
  display: block;
  padding-top: 50%;
}

.checkbox {
  display: none;
}

.checkbox:checked ~ .firefly .abdomen {
  background: #27231e;
  box-shadow: inset 0 0 1.5rem rgba(150, 0, 0, 0.75);
  animation: flicker 4000ms ease infinite;
}
.checkbox:checked ~ .firefly .wing-a {
  transform: rotate(30deg);
}
.checkbox:checked ~ .firefly .wing-b {
  transform: rotate(-30deg);
}

.head {
  position: absolute;
  top: 15%;
  left: 60%;
  bottom: 15%;
  background: #27231e;
  width: 70%;
  border-radius: 40% 80% 80% 40%;
  box-shadow: inset -0.1rem 0 0 0.3rem rgba(14, 10, 10, 0.2);
}

.eyes {
  position: absolute;
  top: -5%;
  right: 10%;
  bottom: -5%;
  width: 35%;
}
.eyes:before, .eyes:after {
  content: '';
  display: block;
  position: absolute;
  right: 0;
  width: 100%;
  box-sizing: border-box;
  border-radius: 100%;
  background: #0e0a0a;
  padding-top: 100%;
}
.eyes:before {
  top: 0;
}
.eyes:after {
  bottom: 0;
}

.antennae {
  position: absolute;
  top: 20%;
  left: -150%;
  bottom: 20%;
  width: 400%;
  z-index: -1;
}
.antennae:before, .antennae:after {
  content: '';
  display: block;
  position: absolute;
  right: 0;
  width: 100%;
  box-sizing: border-box;
  border-color: #0e0a0a;
  border-style: solid;
  padding-top: 65%;
  border-width: .25rem .25rem .25rem 0;
}
.antennae:before {
  top: 80%;
  border-radius: 0 100% 100% 100%;
}
.antennae:after {
  bottom: 80%;
  border-radius: 100% 100% 100% 0;
}

.thorax {
  position: absolute;
  top: 0;
  left: 100%;
  bottom: 0;
  background: #d43b1f;
  width: 30%;
  border-radius: 20% 80% 80% 20%;
  box-shadow: inset -0.1rem 0 0.1rem 0.3rem rgba(0, 0, 0, 0.2);
}

.abdomen {
  position: absolute;
  top: 10%;
  right: 20%;
  bottom: 10%;
  background: #27231e;
  width: 100%;
  transition: all 1000ms ease;
  border-radius: 100% 30% 30% 100%;
  box-sizing: border-box;
}
.abdomen:after {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: repeating-linear-gradient(90deg, transparent 0, transparent 15%, rgba(0, 0, 20, 0.1) 15%, rgba(0, 0, 20, 0.1) 20%);
  mix-blend-mode: multiply;
  border-radius: 100% 30% 30% 100%;
  z-index: 0;
  box-shadow: inset -1rem 0 0.2rem 0.3rem rgba(0, 0, 0, 0.1);
}

.wings {
  position: absolute;
  top: -20%;
  right: 0;
  bottom: -20%;
  left: -5%;
  z-index: 1;
}
.wings .wing {
  position: absolute;
  right: 0;
  background: repeating-linear-gradient(#27231e 0%, #27231e 40%, #191613 40%, #191613 60%);
  width: 100%;
  height: 50%;
  transition: all 200ms ease-out;
  border: 1px solid #40341d;
  box-sizing: border-box;
  box-shadow: inset 0.2rem 0 0.1rem 0.5rem rgba(0, 0, 0, 0.5);
}
.wings .wing.wing-a {
  transform-origin: bottom right;
  top: 0;
  border-radius: 90% 30% 0 20%;
}
.wings .wing.wing-b {
  transform-origin: top right;
  top: 50%;
  border-radius: 20% 0 30% 90%;
}

@keyframes flicker {
  0%, 100% {
    background: #fefa01;
    box-shadow: 0 0 1rem #fefa01, inset -0.25rem 0 0 0.5rem rgba(14, 10, 10, 0.1);
  }
  30%, 70% {
    background: #fffd99;
    box-shadow: -1rem 0 8rem 1rem #fefa01, inset -0.25rem 0 0 0.5rem rgba(14, 10, 10, 0.1);
  }
  50% {
    box-shadow: -1rem 0 8rem 1rem rgba(254, 250, 1, 0.8), inset -0.25rem 0 0 0.5rem rgba(14, 10, 10, 0.1);
  }
}