@media screen and (min-width: 1600px) and (max-width: 1920px) {
    
    #merrychristmas {
       top: 12%;
    }
    
    .gift {
    top: -250px;
    }
    
    .collines {
    top: -448px;
    left: 0;
    z-index: 600;
    }
}

@media screen and (min-width: 200px) and (max-width: 640px) {S
    
    #merrychristmas {
       top: 16%;
    }
    
  #merrychristmas img {
    margin: 0 auto;
    width: 83%;
    display: block;
  }
    
    #particles-js {
    z-index: 900;
    position: inherit;
    width: 100%;
    /* height: 100%; */
}
    
    .collines {
    background: url(img/neige.png) repeat-x center bottom;
    width: 100%;
    height: 195px;
    position: absolute;
    top: -120px;
    left: 0;
    z-index: 500;
}
    
    .gift {
    background: url(img/gift.png) no-repeat center top;
    width: 69%;
    height: 216px;
    position: absolute;
    top: -200px;
    left: 56px;
    z-index: 600;
    background-size: contain;
    
    
}
    .particles-background {
    z-index: 100;
    width: 100%;
    height: 600px;
    background-image: url(img/fond.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 50% 50%;
}
    
    #gallerie {
    position: relative;
    display: table;
    margin-bottom: 50px;
    margin: 0px 65px;
}
    
    #perenoel {
    z-index: 400;
    width: 200px;
    height: 100px;
    top: 200px;
    position: absolute;
    background-image: url(img/pere-noel.png);
    animation-name: perenoel;
    animation-duration: 4s;
    opacity: 0;
    animation-timing-function: ease-in;
    transform: rotate(-20deg);
    background-size:contain;
}
    
    @keyframes perenoel {
    0%   {left:0px; top:400px; opacity: 0;}
    
    50%  {opacity: 1;}
    
    100% {left:600px; top:0px; opacity: 0;}
}
    
    h2 {
    font-family: chewy;
    color: #8A8A8A;
    font-size: 54px;
    margin-top: -20px;
}
}