#button_show_hints {
  display: none;
}

#confirm_button {
  display: none;
}

#undo_button {
  display: none;
}

#edit_hint {
  display: none;
}

.selectable_out:hover {
  outline: red 3px solid;
}

.selected_out {
  outline: red 3px solid;
}

.selectable_in:hover {
  outline: green 3px solid;
}

.selected_in {
  outline: green 3px solid;
}

#time_left {
  font-weight: bold;
}