body {
background: #eee;
}
.gallery {
  padding: 20px;
  border: 1px solid #777;
  overflow: hidden;
  border-radius: 25px;
}
.gallery .inner {
  position: relative;
  overflow: hidden;
  display: block;
  width: auto;
  max-width: 800px;
}
.gallery img {
  display: none;
}
.main {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
  background: #ccc;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  overflow: hidden;
  margin-bottom: 20px;
}
.main:before {
content: "";
position: absolute;
left: 0;
bottom: 0;
width: 100%;
height: 100px;

background: -moz-linear-gradient(top,  rgba(0,0,0,0) 0%, rgba(0,0,0,0.7) 100%);
background: -webkit-linear-gradient(top,  rgba(0,0,0,0) 0%,rgba(0,0,0,0.7) 100%);
background: linear-gradient(to bottom,  rgba(0,0,0,0) 0%,rgba(0,0,0,0.7) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00000000', endColorstr='#a6000000',GradientType=0 );
}
.main-selected {
  animation: crossfade 0.5s ease;
  -webkit-animation: crossfade 0.5s ease;
  -moz-animation: crossfade 0.5s ease;
}
@keyframes crossfade {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}

@-webkit-keyframes crossfade {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}

@-moz-keyframes crossfade {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}
.main span {
  position: absolute;
  display: block;
  text-align: center;
  font-size: 16px;
  font-family: sans-serif;
  color: #fff;
  bottom: 10px;
  left: 0;
  right: 0;
}
.thumb-roll {
position: relative;
width: auto;
overflow-x: auto;
overflow-y: hidden; 

white-space: nowrap;
}
.thumb {
  display: inline-block;
  position: relative;
  width: 100px;
  height: 100px;
  margin-right: 20px;
  background: #ccc;
  overflow: hidden;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  overflow: hidden;
  cursor: pointer;
}
.thumb:last-of-type {
  margin-right: 0px;
}
.thumb:after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  box-shadow: inset 5px 5px 0px rgba(51, 204, 255, 0), inset -5px -5px 0px rgba(51, 204, 255, 0);
}
.thumb.current:after {
  box-shadow: inset 5px 5px 0px rgba(51, 204, 255, 1), inset -5px -5px 0px rgba(51, 204, 255, 1);
  background: rgba(255,255,255,0.4);
  cursor: default;
}
.thumb:hover:after {
  box-shadow: inset 5px 5px 0px rgba(51, 204, 255, 1), inset -5px -5px 0px rgba(51, 204, 255, 1);
}