/* Enhanced Loading Animations for Dashboard */

/* Loading Container */
.loading-container {
  padding: 2rem;
  min-height: 400px;
  animation: fadeIn 0.3s ease-in;
}

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

/* Skeleton Dashboard Layout */
.skeleton-dashboard {
  margin-top: 2rem;
  animation: slideUp 0.4s ease-out;
}

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

/* Food Selection Loading State */
.food-selection-loading {
  position: relative;
  overflow: hidden;
}

.food-selection-loading::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(37, 99, 235, 0.1) 50%,
    transparent 100%
  );
  animation: shimmer 2s infinite;
}

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

/* Meal Card Loading Animation */
.meal-card-loading {
  background: linear-gradient(
    90deg,
    var(--fs-bg-secondary) 25%,
    #e9ecef 50%,
    var(--fs-bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: 0.5rem;
  height: 120px;
  margin-bottom: 1rem;
}

/* Progress Bar Smooth Transitions */
.progress-bar {
  transition: width 0.6s ease-out;
}

/* Loading Step Text Animation */
.loading-step {
  animation: fadeInOut 1.5s ease-in-out infinite;
}

@keyframes fadeInOut {
  0%,
  100% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
}

/* Staggered Loading Animation for List Items */
.loading-item {
  opacity: 0;
  animation: fadeInUp 0.4s ease-out forwards;
}

.loading-item:nth-child(1) {
  animation-delay: 0.1s;
}
.loading-item:nth-child(2) {
  animation-delay: 0.2s;
}
.loading-item:nth-child(3) {
  animation-delay: 0.3s;
}
.loading-item:nth-child(4) {
  animation-delay: 0.4s;
}
.loading-item:nth-child(5) {
  animation-delay: 0.5s;
}

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

/* Spinner Variations */
.spinner-dots {
  display: inline-flex;
  gap: 0.3rem;
}

.spinner-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--bs-primary);
  animation: dotPulse 1.4s infinite ease-in-out both;
}

.spinner-dots span:nth-child(1) {
  animation-delay: -0.32s;
}
.spinner-dots span:nth-child(2) {
  animation-delay: -0.16s;
}

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

/* Success Animation - successPulse keyframes defined in animations.css */
.loading-success {
  animation: successPulse 0.5s ease-out;
}

/* Error Animation - errorShake keyframes defined in animations.css */
.loading-error {
  animation: errorShake 0.5s ease-out;
}

/* Optimized Performance with GPU Acceleration */
.loading-spinner,
.skeleton-card,
.skeleton-list-item,
.progress-bar {
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .skeleton-card,
  .skeleton-list-item {
    background: #2d2d2d;
  }

  .skeleton-line,
  .skeleton-avatar {
    background: linear-gradient(90deg, #3d3d3d 25%, #4d4d4d 50%, #3d3d3d 75%);
  }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .loading-container {
    padding: 1rem;
  }

  .skeleton-card {
    height: 100px;
  }

  @keyframes fadeInUp {
    from {
      transform: translateY(5px);
    }
  }
}