/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

.loading-content {
  text-align: center;
  max-width: 400px;
  padding: 40px;
}

.loading-content.error {
  color: #e53e3e;
}

/* Loading Spinner */
.loading-spinner {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  border: 4px solid #e2e8f0;
  border-top-color: #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Loading Text */
.loading-text {
  font-size: 20px;
  font-weight: 600;
  color: #2d3748;
  margin-bottom: 20px;
}

/* Progress Bar */
.loading-progress {
  margin: 20px 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: 14px;
  font-weight: 600;
  color: #667eea;
}

.loading-message {
  font-size: 14px;
  color: #718096;
  margin-top: 10px;
  min-height: 20px;
}

/* Error State */
.error-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.error-text {
  font-size: 16px;
  color: #e53e3e;
  margin-bottom: 20px;
}

.retry-button {
  background: #667eea;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.retry-button:hover {
  background: #5568d3;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .loading-content {
    padding: 30px 20px;
    max-width: 90%;
  }
  
  .loading-spinner {
    width: 50px;
    height: 50px;
  }
  
  .loading-text {
    font-size: 18px;
  }
}

/* Skeleton Loading for Table */
.skeleton-row {
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.skeleton-cell {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
  height: 16px;
}

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