.centered {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size:1.3em;
  font-weight: bold;
}
#gp-logo img {
  max-height: 3.5em;
  max-width: none;
}

div.gp-logo-top-left { position: fixed; top: 10px; left: 10px; z-index: 1; }
div.gp-logo-top-right { position: fixed; top: 10px; right: 10px; z-index: 1; }
div.gp-logo-bottom-left { position: fixed; bottom: 10px; left: 10px; z-index: 1; }
div.gp-logo-bottom-right { position: fixed; bottom: 10px; right: 10px; z-index: 1; }

.reveal .controls {
  bottom: 20px;
}
.reveal .slide-number {
  bottom: 3px !important;
  font-size: 0.25em;
  color: gray !important;
  background-color: inherit !important;
}
.reveal .slide-number a {
  font-size: inherit !important;
}
.em { font-size: inherit; }