#back-to-top {
    position: fixed;
    bottom: 40px;
    right: 25px;
    z-index: 9999;
    width: 32px;
    height: 32px;
    text-align: center;
    line-height: 30px;
    background: #7dc142;
    color: #fff;
    cursor: pointer;
    border: 0;
    border-radius: 2px;
    text-decoration: none;
    transition: opacity 0.2s ease-out;
    opacity: 0;
}
#back-to-top:hover {
    background: #7dc142;
}
#back-to-top.show {
    opacity: 1;
}

#w {
  display: block;
  margin: 0 auto;
  text-align: center;
}

#content {
  display: block;
  width: 100%;
  background: #fff;
  padding: 25px 20px;
  padding-bottom: 35px;
  -webkit-box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 2px 0px;
  -moz-box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 2px 0px;
  box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 2px 0px;
}

#thumbnails { display: block; margin-bottom: 10px; }
#thumbnails ul li { float: left; margin-right: 26px; margin-bottom: 12px; }

.clearfix:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; }
.clearfix { display: inline-block; }
 
html[xmlns] .clearfix { display: block; }
* html .clearfix { height: 1%; }