body {
  background-color: #1a1a2e;
  color: #ff69b4;
  font-family: 'Comic Sans MS', cursive;
  text-align: center;
  padding: 2rem;
}

.logo {
  width: 100px;
  filter: drop-shadow(0 0 15px #ff69b4);
  margin-bottom: 1rem;
}

h1 {
  text-shadow: 0 0 15px #ff69b4;
}

.controls button {
  background-color: #ff69b4;
  color: #fff;
  border: none;
  padding: 1rem;
  margin: 1rem;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 0 10px #ff69b4;
}

.flashcard {
  margin-top: 2rem;
  padding: 1rem;
  border: 2px solid #ff69b4;
  box-shadow: 0 0 20px #ff69b4;
  display: inline-block;
}

input {
  padding: 0.5rem;
  font-size: 1rem;
  margin-top: 1rem;
}

footer {
  margin-top: 3rem;
  font-size: 0.9rem;
}

/* Sparkle animation */
@keyframes sparkle {
  0% { box-shadow: 0 0 10px #ff69b4; }
  25% { box-shadow: 0 0 20px #ff69b4, 0 0 30px #ff69b4; }
  50% { box-shadow: 0 0 40px #ff69b4, 0 0 60px #ff69b4; }
  75% { box-shadow: 0 0 20px #ff69b4, 0 0 30px #ff69b4; }
  100% { box-shadow: 0 0 10px #ff69b4; }
}

.flashcard.sparkle {
  animation: sparkle 1s ease-out;
}