/* Interactive Animation Styles for 2-Stack PDA and DTM */

/* Animation for state transitions */
.state-transition {
  animation: stateHighlight 0.6s ease-in-out;
}

@keyframes stateHighlight {
  0% { background-color: inherit; }
  50% { background-color: rgba(59, 130, 246, 0.3); }
  100% { background-color: inherit; }
}

/* Input consumption animation */
.input-consumed {
  animation: inputFade 0.5s ease-out;
}

@keyframes inputFade {
  0% { 
    opacity: 1; 
    transform: scale(1);
  }
  50% { 
    opacity: 0.5; 
    transform: scale(1.1);
  }
  100% { 
    opacity: 0.3; 
    transform: scale(0.9);
  }
}

/* Stack operation animations */
.stack-push-animation {
  animation: stackPushGlow 0.8s ease-out;
}

@keyframes stackPushGlow {
  0% { 
    box-shadow: 0 0 0 rgba(139, 92, 246, 0.5);
    transform: scale(1);
  }
  50% { 
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
    transform: scale(1.05);
  }
  100% { 
    box-shadow: 0 0 0 rgba(139, 92, 246, 0.5);
    transform: scale(1);
  }
}

.stack-pop-animation {
  animation: stackPopGlow 0.8s ease-out;
}

@keyframes stackPopGlow {
  0% { 
    box-shadow: 0 0 0 rgba(239, 68, 68, 0.5);
    transform: scale(1);
  }
  50% { 
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.5);
    transform: scale(1.05);
  }
  100% { 
    box-shadow: 0 0 0 rgba(239, 68, 68, 0.5);
    transform: scale(1);
  }
}

/* Tape head movement animation */
.tape-head-moving {
  animation: headMove 0.5s ease-in-out;
}

@keyframes headMove {
  0% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
  100% { transform: translateY(0); }
}

/* Tape cell write animation */
.tape-cell-write {
  animation: cellWrite 0.6s ease-out;
}

@keyframes cellWrite {
  0% { 
    background-color: white;
    transform: scale(1);
  }
  25% { 
    background-color: rgba(16, 185, 129, 0.3);
    transform: scale(1.1);
  }
  50% { 
    background-color: rgba(16, 185, 129, 0.5);
    transform: scale(1.2);
  }
  75% { 
    background-color: rgba(16, 185, 129, 0.3);
    transform: scale(1.1);
  }
  100% { 
    background-color: white;
    transform: scale(1);
  }
}

/* Equivalence highlighting */
.equivalence-highlight {
  animation: equivalenceGlow 1s ease-in-out infinite alternate;
}

@keyframes equivalenceGlow {
  0% { 
    border-color: rgba(16, 185, 129, 0.5);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
  }
  100% { 
    border-color: rgba(16, 185, 129, 1);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
  }
}

/* Error state animation */
.error-state {
  animation: errorPulse 0.8s ease-in-out;
}

@keyframes errorPulse {
  0% { 
    background-color: inherit;
    border-color: inherit;
  }
  50% { 
    background-color: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
  }
  100% { 
    background-color: inherit;
    border-color: inherit;
  }
}

/* Success state animation */
.success-state {
  animation: successPulse 1s ease-in-out;
}

@keyframes successPulse {
  0% { 
    background-color: inherit;
    border-color: inherit;
  }
  50% { 
    background-color: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
  }
  100% { 
    background-color: inherit;
    border-color: inherit;
  }
}

/* Loading/processing animation */
.processing {
  position: relative;
  overflow: hidden;
}

.processing::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(59, 130, 246, 0.3),
    transparent
  );
  animation: processing 1.5s infinite;
}

@keyframes processing {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Hover effects for interactive elements */
.interactive-element {
  transition: all 0.2s ease;
  cursor: pointer;
}

.interactive-element:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Button state animations */
.control-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.control-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.control-btn:active::before {
  width: 300px;
  height: 300px;
}

/* Synchronized animation class */
.synchronized-step {
  animation: synchronizedHighlight 1s ease-in-out;
}

@keyframes synchronizedHighlight {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.8;
    transform: scale(1.02);
  }
}

/* Focus states for accessibility */
.control-btn:focus,
select:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Mobile touch feedback */
@media (max-width: 768px) {
  .control-btn:active {
    transform: scale(0.95);
  }
  
  .interactive-element:active {
    transform: scale(0.98);
  }
}

/* Fade in animation for panels */
.panel {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger animation for theory items */
.theory-item:nth-child(1) { animation-delay: 0.1s; }
.theory-item:nth-child(2) { animation-delay: 0.2s; }
.theory-item:nth-child(3) { animation-delay: 0.3s; }

.theory-item {
  animation: fadeInUp 0.6s ease-out both;
}