* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 75%;
  overflow: hidden;
}

body {
  text-align: center;
  padding: 3rem 0;
  background-image: radial-gradient(rgba(52, 86, 119, 0.8) 10%, rgba(1, 17, 49, 0.9)), url(images/forest.png);
  background-size: cover;
  background-position: center;
  height: 100vh;
  overflow-y: hidden;
  overscroll-behavior: none;
}

.heading__text {
  font-size: 3rem;
  font-family: 'Merienda', cursive;
  color: #57bcd3;
  margin-bottom: 1.5rem;
  text-shadow: 0 0 7px rgba(0, 0, 0, 0.7);
}

.game {
  margin: 1rem;
  position: relative;
}
.score__text {
  font-size: 2rem;
  font-family: 'Nunito Sans', sans-serif;
  color: #81e4fa;
  margin-bottom: 1rem;
  text-shadow: 0 0 7px rgba(0, 0, 0, 0.7);
}
#game-canvas {
  border-style: solid;
  border-radius: 3px;
  border-width: 5px;
  border-color: #142850;
  transition: all ease;
  position: relative;
}

.game-end {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.game-over {
  font-family: 'Nunito Sans', sans-serif;
  font-size: 5rem;
  color: rgb(182, 255, 255);
  text-shadow: 0px 0px 100px#000000;
  -webkit-text-stroke: 0.17rem rgb(0, 24, 24);
}

.play-again {
  background-color: rgb(10, 173, 173);
  font-family: 'Nunito Sans', sans-serif;
  border-radius: 5px;
  color: rgb(181, 241, 241);
  display: inline-block;
  padding: 1rem;
  font-size: 3rem;
  margin-top: 2rem;
  box-shadow: 0 0 10px 5px rgb(0, 99, 99);
  transition: all .4s;
}

.play-again:hover {
  background-color: #81e4fa;
  color: white;
  cursor: pointer;
}

.play-buttons {
  position: fixed;
  right: 5%;
  top: 50%;
  width: 13.3rem;
  height: 13.3rem;
}

/*pause button*/

.pause-play {
  width: 4.17rem;
  height: 4.17rem;
  background-color: rgb(0, 99, 99);
  margin: auto;
  border-radius: 5px;
  position: relative;
  text-align: center;
  color: #81e4fa;
}
.first-bar, .second-bar {
  width: 15%;
  height: 60%;
  background-color: #81e4fa;
  border-radius: 100px;
  position: absolute;
  top: 20%;
  transition: all .5s;
}

.first-bar {
  left: 27%;
}

.second-bar {
  right: 27%;
}

#check-play {
  display: none;
}

.fa-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all .5s;
}

#check-play:checked ~ .pause-play .first-bar {
  width: 30%;
  clip-path: polygon(0 0, 10% 0, 100% 25%, 100% 75%, 10% 100%, 0 100%);
}

#check-play:checked ~ .pause-play .second-bar {
  transform-origin: left;
  transform: scaleX(2);
  clip-path: polygon(0 20%, 100% 50%, 100% 50%, 0 75%);
}

#check-play:checked ~ .pause-play .fa-play {
  opacity: 1;
}

/* remaining buttons */
.play-button {
  background-color: rgb(0, 99, 99);
  color: #81e4fa;
  border-radius: 5px;
  width: 4.17rem;
  height: 4.17rem;
  position: absolute;
  padding: .58rem;
  transition: all .4s;
  cursor: pointer;
  box-shadow: 0 0 5px 2px rgba(0, 0, 0, 0.5);
}

.play-left, .play-pause, .play-right {
  display: inline-block;
}

.play-top {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.play-left {
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.play-pause {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 5px 2px rgba(0, 0, 0, 0.5);
}

.play-right {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

.play-bottom {
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.play-button:hover {
  background-color: rgb(29, 146, 146);
}

.pause-play {
  transition: all .4s;
}

.pause-play * {
  pointer-events: none;
}

.fas {
  pointer-events: none;
}

.pause-play:hover {
  background-color: rgb(29, 146, 146);
}

.speed-buttons {
  position: fixed;
  right: 7%;
  top: 30%;
}

.speed-up, .speed-down {
  position: static;
  display: inline-block;
}


/*on-off slider maze*/
.checkbox-maze {
  position: relative;
  display: inline-block;
}
.checkbox-maze__label {
  width: 7.5rem;
  height: 3.5rem;
  background: rgb(137, 192, 199);
  position: relative;
  display: inline-block;
  border-radius: 3.83rem;
  transition: 0.4s;
  box-shadow: inset 0 0 5px 2px black;
}
.checkbox-maze__label:after {
  content: '';
  box-sizing: border-box;
  /* display: block; */
  position: absolute;
  width: 4.17rem;
  height: 4.17rem;
  border-radius: 100%;
  left: 0;
  top: -5px;
  z-index: 2;
  background: rgb(191, 255, 242);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.6);
  transition: 0.4s;
}
.checkbox-maze__input {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  opacity: 0;
  cursor: pointer;
}

.checkbox-maze__input:checked + .checkbox-maze__label {
  background: #376fcb;
}

.checkbox-maze__input:hover + .checkbox-maze__label:after {
  box-shadow: 0 0 15px #000;
}

.checkbox-maze__input:checked + .checkbox-maze__label:after {
  left: 3.33rem;
  background: #4285F4;
}

.maze-toggle {
  position: absolute;
  left: 10%;
  top: 50%;
}

.auto-toggle {
  top: 70%;
}

.stop-button {
  width: auto;
  height: 4rem;
  padding: 0.5rem;
  right: 8%;
  bottom: 15%;
}

.stop-button .score__text {
  pointer-events: none;
}

.instruction-button {
  width: 15rem;
  left: 15%;
  transform: translateX(-50%);
  top: 35%;
}

.popup-check {
  display: none;
}

.instructions {
  max-width: 700px;
  width: 90%;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.4);
  background-color: rgb(7, 74, 100);
  color: aliceblue;
  font-family: 'Roboto Slab', sans-serif;
  font-size: 1.85rem;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 0 2000px 1000px rgba(0, 0, 0, 0.7), inset 0 0 7px 2px #81e4fa;
  opacity: 0;
  z-index: 10;
  visibility: hidden;
  transition: all 0.4s;
}

#check-popup:checked ~ .instructions {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.instructions__list {
  list-style-position: inside;
  text-align: left;
}

.instructions__item {
  margin: 1rem 0;
}

.instructions .fas {
  pointer-events: all;
}

.fa-times {
  position: absolute;
  top: 1rem;
  right: 2rem;
  cursor: pointer;
  transition: all .6s;
}

.fa-times:hover {
  color: #81e4fa;
}

@media(max-width: 1200px) {
  .speed-buttons {
    top: unset;
    right: unset;
    bottom: 5%;
    left: 20%;
  }

  .maze-toggle {
    top: unset;
    right: unset;
    bottom: 4.5rem;
    left: 50%;
    transform: translateX(-50%);
  }

  .play-buttons {
    top: unset;
    right: unset;
    bottom: 10%;
    right: 20%;
  }

  .stop-button {
    left: 50%;
    transform: translateX(-50%);
    bottom: 0.5%;
    width: 6rem;
  }

  .auto-toggle {
    bottom: 12.5rem !important;
  }

  .stop-button {
    width: 5rem;
    height: 3rem;
    font-size: 2px !important;
    padding: 0.1rem;
  }
  
  .instruction-button {
    top: unset;
    bottom: 15%;
    left: 20%;
  }
}

@media(max-width: 900px) {
  .speed-buttons {
    bottom: 10%;
    left: 20%;
  }

  .maze-toggle {
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
  }

  .play-buttons {
    bottom: 5%;
    right: 20%;
  }
}

@media(max-width: 600px) {
  html {
    font-size: 45%;
  }
  .speed-buttons {
    bottom: 5%;
    left: 5%;
  }

  .play-buttons {
    bottom: 2%;
    right: 5%;
  }

}