.illustration{position:relative;margin:0 auto}.i-large,.i-medium,.i-small{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1}.i-large{background:url("../img/snow/particules_large.png") repeat 0px 0px;-webkit-animation:dropFlowParticles 2s linear infinite;-o-animation:dropFlowParticles 2s linear infinite;animation:dropFlowParticles 2s linear infinite}.i-medium{background:url("../img/snow/particules_medium.png") repeat 0px 0px;-webkit-animation:dropFlowParticles 12s linear infinite;-o-animation:dropFlowParticles 12s linear infinite;animation:dropFlowParticles 12s linear infinite}.i-small{background:url("../img/snow/particules_small.png") repeat 0px 0px;-webkit-animation:dropFlowParticles 27s linear infinite;-o-animation:dropFlowParticles 27s linear infinite;animation:dropFlowParticles 27s linear infinite}@-webkit-keyframes dropFlowParticles{from{background-position:0 0}to{background-position:0 413px}}@keyframes dropFlowParticles{from{background-position:0 0}to{background-position:0 413px}}.illustration a{position:relative;z-index:11}