#porte {
    margin: auto;
    width: 450px;
    border: 3px solid black;
}

/* Uncomment to show backtracking */
#porte > .door.backtrack {
    /*-webkit-filter: blur(3px);*/
}

#porte > .door {
    display: inline-block;
    height: 140px;
    width: 80px;
    background-image: url("door.png");
    background-size: contain;
    background-repeat: no-repeat;
}

#porte > .door:empty {
    opacity: 0;
}

#porte > .door > a {
    display: block;
    height: 100%;
}

.west {
    margin-right: 140px;
}

.east {
    margin-left: 140px;
}

.north, .south {
    display: block !important;
    margin-left: auto;
    margin-right: auto;
}

body {
    text-align: center;
    padding: 0 10px;
    margin: 0 auto;
    position: relative;
    background-image: url("Labyrinthe.jpg");
    background-size: cover;
    background-repeat: no-repeat;
}

#info {
  font-size: 2.4em;
  color: darkred;
  font-weight: bold;
  margin-bottom: 70px;
  display: inline-block;
  background-color: rgba(120, 120, 120, 0.75);
  border-radius: 15px;
}

#infofin {
  font-size: 4.4em;
  color: yellow;
  font-weight: bold;
  margin-top: 200px;
  display: inline-block;
  background-color: rgba(128, 128, 128, 0.25);
  border-radius: 15px;
}

#indice::before {
  content: "Indice : ";
  font-weight: bold;
  color: blue;
}

#indice {
  display: inline-block;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  margin-top: 2em;
  font-size: 2.5em;
  background-color: rgba(128, 128, 128, 0.75);
  border-radius: 15px;
  animation: apparition 4s 1;
}

@keyframes apparition {
  from {opacity: 0;}
  to   {opacity: 1;}
}