html,
body {
  background-image: url('images/background-large.jpg');
}
.provider-logo {
  background-image: url('images/provider-logo.png');
}
.event-logo {
  background-image: url('images/event-logo.png');
}
.docked .event-logo {
  background-image: url('images/event-logo-clean.png');
}