.btn-selected {
  border: 2px solid #ccc;
  border-radius: 50%;
  padding: 0.5rem;
  transition: transform 0.3s;
}

.btn-selected:hover {
  transform: scale(1) !important;
}

/* top bar */
#top-bar {
  transition: transform 0.5s ease-in-out;
}

#top-bar.visible-top-bar {
  transform: translateY(0);
}

#top-bar.hidden-top-bar {
  transform: translateY(-100%);
}