/**
 * TRAINER EFFECTS CSS
 * Extracted from JS for CSP compliance and better caching.
 */

/* Flash effect on correct answer */
@keyframes correctFlash {
  0% { box-shadow: 0 0 0 rgba(48, 209, 88, 0); }
  50% { box-shadow: 0 0 30px rgba(48, 209, 88, 0.8); }
  100% { box-shadow: 0 0 0 rgba(48, 209, 88, 0); }
}

.correct-flash {
  animation: correctFlash 0.5s ease-out;
}

/* Confetti animation */
@keyframes confettiFall {
  to {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

.confetti {
  position: fixed;
  width: 8px;
  height: 8px;
  top: -10px;
  z-index: 9999;
  animation: confettiFall linear forwards;
  will-change: transform; /* GPU acceleration */
}

/* Mobile optimization */
@media (max-width: 768px) {
  .confetti {
    width: 6px;
    height: 6px;
  }
}

/* Particle burst animation */
@keyframes particleBurst {
  0% {
    transform: translate(-50%, -50%) rotate(var(--angle)) translateY(0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) rotate(var(--angle)) translateY(50px) scale(0);
    opacity: 0;
  }
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #FFD60A;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  animation: particleBurst 0.6s ease-out forwards;
  will-change: transform;
}