/* Regenbogen-Schimmer Effekt für richtige Antwort */
@keyframes rainbow-glow {
    0% {
      filter: hue-rotate(0deg);
    }
    100% {
      filter: hue-rotate(360deg);
    }
  }
  
  .feedback.correct {
    animation: rainbow-glow 2s linear infinite;
    font-size: 1.5rem;
    font-weight: bold;
  }