@-webkit-keyframes fade-in {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
@-moz-keyframes fade-in {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
@-o-keyframes fade-in {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes fade-in {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
img.bto-lazy {
    background-color: #CCCCCC;
    width: 100%;
    height: auto;
    transition: opacity .3s;
    opacity: 0;
}
img.bto-lazy-loaded {
    opacity: 1;
    background: none;
}

div.bto-lazy-jump {
    display: inline-block;
}