body {
  background: #151c29;
}

#preview {
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
}

#preview .header {
  height: 30px;
}

#preview .content {
  margin-top: 10px;
  height: 500px;
  text-align: center;
  overflow-y: auto;
}

#preview .content .loader {
  background: url(../images/files/loading.gif) no-repeat center center;
  background-size: 77px;
  margin-top: 150px;
  padding-top: 120px;
  text-align: center;
}

#preview .content .no-preview {
  margin-top: 220px;
}

.content::-webkit-scrollbar {
  height: 5px;
  width: 10px;
}
.content::-webkit-scrollbar-track {
  background-color: #151c29;
}
.content::-webkit-scrollbar-thumb {
  background-color: #303947;
}
.content::-webkit-scrollbar-thumb:hover {
  background-color: #303947;
}