html{
  background: url("../img/rain.gif") no-repeat center center fixed;
  background-size: cover;
  height: 100%;
}
body{
  background-color: rgba(255,255,255,0.5);
  min-height: 100%;
}

.sl-button{
  padding: 15px;
}

.graph{
  max-width: 100%;
  display: block;
  margin-left:auto;
  margin-right:auto;
}