html, body {
  margin: 0 auto;
  padding: 0;
  max-width: 800px;
  font-family: monospace;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: #24222e;
  color: rgb(245, 246, 255);
  text-align: center;
}

a {
  color: tomato;
}
hr {
  margin: 2em 0;
  opacity: 0.3;
}

#template {
  position: absolute;
  top: -999em;
}

.game-container {
  width: 800px;
  height: 530px;
  overflow: hidden;
  margin: 2em auto;
  background-color: #2a2737;
  --corner: 1em;
  clip-path: polygon(
    var(--corner) 0, calc(100% - var(--corner)) 0,
    100% var(--corner), 100% calc(100% - var(--corner)),
    calc(100% - var(--corner)) 100%, var(--corner) 100%,
    0% calc(100% - var(--corner)), 0 var(--corner)
  );
}
#game {
  position: relative;
  top: -70px;
  width: 800px;
  height: 600px;
  margin: 20px auto 40px;
  overflow: hidden;
  background-color: #24222e;
  -webkit-transform: perspective(200px) rotateX(15deg) translateY(-90px);
          transform: perspective(200px) rotateX(15deg) translateY(-90px);
  cursor: url('vessel.png'), auto;
  text-align: center;
  text-transform: uppercase;
}



#gameover,
#win {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}

#gameover {
  display: none;
  background: tomato;
}
#win {
  opacity: 0;
  pointer-events: none;
}

#start-spot {
  position: absolute;
  bottom: 10px;
  left: 50%;
  width: 20px;
  height: 20px;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  background: rgb(245, 246, 255);
}

.wall-left,
.wall-right {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 400%;
  background: linear-gradient(rgb(245, 246, 255),rgb(96, 96, 105));
  transform: translateZ(1px);
}
.wall-left {
  left: 0;
  clip-path: url('#left');
}
.wall-right {
  right: 0;
  clip-path: url('#right');
}

#game:hover .wall-left,
#game:hover .wall-right {
  -webkit-animation: wallScroll 10s ease-in forwards;
          animation: wallScroll 10s ease-in forwards;
}
#game:hover #win {
  -webkit-animation: win 10s linear forwards;
          animation: win 10s linear forwards;
}

#game:hover #start-spot {
  display: none;
}

.wall-left:hover ~ #gameover,
.wall-right:hover ~ #gameover,
#gameover:hover {
  display: block;
  z-index: 1;
}


/* Quelques styles pour la forme */
#gameover h1,
#win h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate3d(-50%, -50%, 0);
          transform: translate3d(-50%, -50%, 0);
}
.instructions {
  font-weight: lighter;
  line-height: 1.4;
}

/* Les keyframes en bas de document, par convention */


@keyframes wallScroll {
  0% {
    transform: none;
  }
  100% {
    transform: translateY(100%);
  }
}


@keyframes win {
  0% {
    opacity: 0;
  }
  99% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}