/* Question animations */

@keyframes celebrate {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.05); }
  50% { transform: scale(0.95); }
  75% { transform: scale(1.02); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-once {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes bounce-once {
  0%, 100% { transform: translateY(0); }
  25% { transform: translateY(-10px); }
  50% { transform: translateY(-5px); }
  75% { transform: translateY(-2px); }
}

.celebrate {
  animation: celebrate 0.6s ease-in-out;
}

.shake {
  animation: shake 0.5s ease-in-out;
}

.bounce {
  animation: bounce 1s ease-in-out infinite;
}

.animate-pulse-once {
  animation: pulse-once 1s ease-in-out;
}

.animate-bounce-once {
  animation: bounce-once 0.6s ease-in-out;
}

/* Confetti effect for correct answers */
.confetti {
  position: fixed;
  width: 10px;
  height: 10px;
  background: #f0f;
  position: absolute;
  animation: confetti-fall 3s linear infinite;
}

@keyframes confetti-fall {
  to {
    transform: translateY(100vh) rotate(360deg);
    opacity: 0;
  }
}

/* Smooth transitions */
.question-card {
  transition: all 0.3s ease-in-out;
}

.question-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Answer selection effect removed - using border styling instead */

/* Loading animation */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.shimmer {
  animation: shimmer 2s infinite;
  background: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
  background-size: 1000px 100%;
}