.bird {
  background-image: url(../bird-cells-new.png);
  background-size: auto 100%;
  width: 88px;
  height: 125px;
  will-change: background-position;
  -webkit-animation-name: fly-cycle;
          animation-name: fly-cycle;
  -webkit-animation-timing-function: steps(10);
          animation-timing-function: steps(10);
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.bird--one {
  -webkit-animation-duration: 1s;
          animation-duration: 1s;
  -webkit-animation-delay: -0.5s;
          animation-delay: -0.5s;
}
.bird--two {
  -webkit-animation-duration: 0.9s;
          animation-duration: 0.9s;
  -webkit-animation-delay: -0.75s;
          animation-delay: -0.75s;
}
.bird--three {
  -webkit-animation-duration: 1.25s;
          animation-duration: 1.25s;
  -webkit-animation-delay: -0.25s;
          animation-delay: -0.25s;
}
.bird--four {
  -webkit-animation-duration: 1.1s;
          animation-duration: 1.1s;
  -webkit-animation-delay: -0.5s;
          animation-delay: -0.5s;
}

.bird-container {
  position: absolute;
  top: -100px;
  left: -10%;
  transform: scale(0) translateX(-10vw);
  will-change: transform;
  -webkit-animation-name: fly-right-one;
          animation-name: fly-right-one;
  -webkit-animation-timing-function: linear;
          animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.bird-container--one {
  -webkit-animation-duration: 15s;
          animation-duration: 15s;
  -webkit-animation-delay: 0;
          animation-delay: 0;
}
.bird-container--two {
  -webkit-animation-duration: 16s;
          animation-duration: 16s;
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}
.bird-container--three {
  -webkit-animation-duration: 14.6s;
          animation-duration: 14.6s;
  -webkit-animation-delay: 9.5s;
          animation-delay: 9.5s;
}
.bird-container--four {
  -webkit-animation-duration: 16s;
          animation-duration: 16s;
  -webkit-animation-delay: 10.25s;
          animation-delay: 10.25s;
}

@-webkit-keyframes fly-cycle {
  100% {
    background-position: -900px 0;
  }
}

@keyframes fly-cycle {
  100% {
    background-position: -900px 0;
  }
}
@-webkit-keyframes fly-right-one {
  0% {
    transform: scale(0.3) translateX(-10vw);
  }
  10% {
    transform: translateY(2vh) translateX(10vw) scale(0.4);
  }
  20% {
    transform: translateY(0vh) translateX(30vw) scale(0.5);
  }
  30% {
    transform: translateY(4vh) translateX(50vw) scale(0.6);
  }
  40% {
    transform: translateY(2vh) translateX(70vw) scale(0.6);
  }
  50% {
    transform: translateY(0vh) translateX(90vw) scale(0.6);
  }
  60% {
    transform: translateY(0vh) translateX(110vw) scale(0.6);
  }
  100% {
    transform: translateY(0vh) translateX(110vw) scale(0.6);
  }
}
@keyframes fly-right-one {
  0% {
    transform: scale(0.3) translateX(-10vw);
  }
  10% {
    transform: translateY(2vh) translateX(10vw) scale(0.4);
  }
  20% {
    transform: translateY(0vh) translateX(30vw) scale(0.5);
  }
  30% {
    transform: translateY(4vh) translateX(50vw) scale(0.6);
  }
  40% {
    transform: translateY(2vh) translateX(70vw) scale(0.6);
  }
  50% {
    transform: translateY(0vh) translateX(90vw) scale(0.6);
  }
  60% {
    transform: translateY(0vh) translateX(110vw) scale(0.6);
  }
  100% {
    transform: translateY(0vh) translateX(110vw) scale(0.6);
  }
}
@-webkit-keyframes fly-right-two {
  0% {
    transform: translateY(-2vh) translateX(-10vw) scale(0.5);
  }
  10% {
    transform: translateY(0vh) translateX(10vw) scale(0.4);
  }
  20% {
    transform: translateY(-4vh) translateX(30vw) scale(0.6);
  }
  30% {
    transform: translateY(1vh) translateX(50vw) scale(0.45);
  }
  40% {
    transform: translateY(-2.5vh) translateX(70vw) scale(0.5);
  }
  50% {
    transform: translateY(0vh) translateX(90vw) scale(0.45);
  }
  51% {
    transform: translateY(0vh) translateX(110vw) scale(0.45);
  }
  100% {
    transform: translateY(0vh) translateX(110vw) scale(0.45);
  }
}
@keyframes fly-right-two {
  0% {
    transform: translateY(-2vh) translateX(-10vw) scale(0.5);
  }
  10% {
    transform: translateY(0vh) translateX(10vw) scale(0.4);
  }
  20% {
    transform: translateY(-4vh) translateX(30vw) scale(0.6);
  }
  30% {
    transform: translateY(1vh) translateX(50vw) scale(0.45);
  }
  40% {
    transform: translateY(-2.5vh) translateX(70vw) scale(0.5);
  }
  50% {
    transform: translateY(0vh) translateX(90vw) scale(0.45);
  }
  51% {
    transform: translateY(0vh) translateX(110vw) scale(0.45);
  }
  100% {
    transform: translateY(0vh) translateX(110vw) scale(0.45);
  }
}

  

#le_bouton {
   position: fixed;
   color:#FFF;
   background-color:#111;
   bottom: 25px;
   right: 25px;
   font-size:large;
   font-weight:bold;
}



						
	.modalDialog {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99999;
    opacity:0;
    -webkit-transition: opacity 400ms ease-in;
    -moz-transition: opacity 400ms ease-in;
    transition: opacity 400ms ease-in;
    pointer-events: none;
}

.modalDialog:target {
    opacity:1;
    pointer-events: auto;
}

.modalDialog > div {
    width: 450px;
	max-width:100%;
    position: relative;
    margin: 10% auto;
    padding: 25px;
    border-radius: 8px;
    background: linear-gradient(to bottom, #273d4a, #142c3a);
    box-shadow: 6px 6px 6px rgba(0, 0, 0, .2);
}

.close {
background: #9b8b6b;
color: #FFFFFF;
margin-top:20px;
line-height: 25px;
text-align: center;
float: right;
width: 80px;
opacity: 1;
text-decoration: none;
font-weight: bold;
border-radius: 12px;
}

.close:hover { 
background: #2d2d2d; }