.panel {
  background-image: linear-gradient(135deg, #242a3af2, #171b27fa), url('Background/Gray.png');
  background-size: auto, 96px;
  image-rendering: pixelated;
}

#gameOver .panel,
#victory .panel {
  background-image: linear-gradient(135deg, #292331ed, #17151dfa), url('Background/Yellow.png');
}