/* Animation Keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes heartPulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.3);
    opacity: 0;
  }
}

@keyframes heartBeat {
  0% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes floatHeart {
  0% {
    transform: translateY(0) rotate(45deg);
    opacity: 0.7;
  }
  50% {
    transform: translateY(-20px) rotate(45deg);
    opacity: 1;
  }
  100% {
    transform: translateY(-40px) rotate(45deg);
    opacity: 0;
  }
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* Interactive Animation Classes */
.animate-bounce {
  animation: bounce 1s infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-ping {
  animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Hover Animations */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-scale {
  transition: transform var(--transition-fast);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(255, 107, 157, 0.3);
}

/* Micro-interactions */
.heart-reaction {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
  animation: heartReaction 1s ease-out forwards;
}

@keyframes heartReaction {
  0% {
    opacity: 1;
    transform: scale(0) translateY(0);
  }
  15% {
    transform: scale(1.2) translateY(-5px);
  }
  100% {
    opacity: 0;
    transform: scale(1) translateY(-50px);
  }
}

.confetti-particle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent-pink);
  animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translateY(300px) rotate(720deg);
  }
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-3) var(--spacing-4);
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-4);
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gray-400);
  animation: typingDot 1.4s ease-in-out infinite both;
}

.typing-dot:nth-child(1) {
  animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes typingDot {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Connection Status */
.connection-status {
  position: fixed;
  bottom: var(--spacing-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  z-index: var(--z-modal);
  animation: slideInUp 0.3s ease-out;
}

.connection-status.connected {
  background: var(--success);
}

.connection-status.connecting {
  background: var(--warning);
}

.connection-status.disconnected {
  background: var(--error);
}

/* Message Reactions */
.message-reactions {
  display: flex;
  gap: var(--spacing-1);
  margin-top: var(--spacing-2);
  flex-wrap: wrap;
}

.reaction {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  padding: var(--spacing-1) var(--spacing-2);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  animation: reactionPop 0.2s ease-out;
}

.reaction:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

@keyframes reactionPop {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  80% {
    transform: scale(1.2);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Voice Recording Animation */
.recording-pulse {
  animation: recordingPulse 1s ease-in-out infinite;
}

@keyframes recordingPulse {
  0% {
    background: var(--error);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
  }
  100% {
    background: var(--error);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

/* Memory Timeline Animation */
.memory-timeline {
  position: relative;
}

.memory-timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-pink), var(--accent-purple));
}

.memory-item {
  position: relative;
  margin-bottom: var(--spacing-6);
  animation: memorySlideIn 0.6s ease-out;
}

.memory-marker {
  position: absolute;
  left: 16px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-pink);
  border: 4px solid white;
  box-shadow: var(--shadow-sm);
  animation: memoryPulse 2s ease-in-out infinite;
}

@keyframes memorySlideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes memoryPulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 107, 157, 0.4);
  }
}

/* Loading Animations for Different States */
.loading-dots {
  display: inline-flex;
  gap: var(--spacing-1);
}

.loading-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-400);
  animation: loadingDot 1.4s ease-in-out infinite both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }
.loading-dot:nth-child(3) { animation-delay: 0s; }

@keyframes loadingDot {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* Responsive Animations */
@media (max-width: 768px) {
  .hover-lift:hover {
    transform: translateY(-2px);
  }
  
  .hover-scale:hover {
    transform: scale(1.02);
  }
}

/* Accessibility - Respect Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .heart-reaction,
  .confetti-particle,
  .memory-marker,
  .floating-heart,
  .typing-dot {
    animation: none !important;
  }
  
  .hover-lift:hover,
  .hover-scale:hover {
    transform: none !important;
  }
}