.logo {
  background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAGCAYAAADgzO9IAAAAP0lEQVQIHWWMAQoAIAgDR/QJ/Ub//04+w7ZICBwcOg5FZi5iBB82AGzixEglJrd4TVK5XUJpskSTEvpdFzX9AB2pGziSQcvAAAAAAElFTkSuQmCC);
}