#rb {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media(min-width: 992px) {
  #rb {
    grid-template-columns: 33% 34% 33%;
    align-items: start;
  }
}

#rb-gems {
  max-height: 500px;
  overflow-y: auto;
}

.gem {
  cursor: pointer;
  padding: 10px;
  border: 1px solid #eee;
  margin-bottom: 10px;
  text-align: center;
}

.gem.active {
  border: 2px solid #a0002a;
}

#rb-actions {
  margin-top: 20px;
  display: flex;
  gap: 10px;
}

#rb-actions button {
  padding: 10px 15px;
  cursor: pointer;
}

#rb-stage {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: auto;
}

#rb-bg {
  width: 100%;
  display: block;
}

#rb-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: all;
}