img { 
  border-style: none !important;
  box-shadow: none !important;
}


div.slide-background.present {
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
}

html { 
  background-color: #fff !important; 
}
 
html:-webkit-full-screen-ancestor {
  background-color: inherit; }

html:-moz-full-screen-ancestor {
  background-color: inherit; }