/* Modern Card Component - Design System Compliant */

.modern-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
  margin: var(--space-lg) 0;
}

.modern-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Modern Card Header */
.modern-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.modern-card-header:hover {
  background: var(--bg-tertiary);
}

.modern-card-header:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: -2px;
  background: var(--bg-tertiary);
}

/* Header Content */
.modern-card-header-content {
  display: flex;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  flex: 1;
  min-width: 0; /* Prevent overflow */
}

.modern-card-header-content i {
  color: var(--primary-600);
  font-size: 1rem;
  flex-shrink: 0;
}

.modern-card-header-content strong {
  font-weight: 600;
  line-height: 1.5;
}

/* Header Actions */
.modern-card-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: var(--space-md);
}

/* Action Buttons */
.modern-card-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--primary-300);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--primary-600);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  z-index: 10; /* Ensure it's above the header click area */
}

.modern-card-action-btn:hover {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-color: var(--primary-500);
  color: white;
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

.modern-card-action-btn:active {
  transform: scale(0.95);
}

.modern-card-action-btn:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Collapse Button */
.modern-card-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  position: relative;
  z-index: 10;
}

.modern-card-collapse-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-strong);
  color: var(--text-primary);
  transform: scale(1.05);
}

.modern-card-collapse-btn:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.modern-card-collapse-btn i {
  transition: transform var(--transition-fast);
  transform-origin: center;
}

/* Collapsed state */
.modern-card[data-collapsed="true"] .modern-card-collapse-btn i {
  transform: rotate(-90deg);
}

/* Card Content */
.modern-card-content {
  background: var(--bg-primary);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.modern-card-content.collapsed {
  max-height: 0;
  padding: 0;
  opacity: 0;
  transform: translateY(-10px);
}

.modern-card-content.expanded {
  max-height: none;
  opacity: 1;
  transform: translateY(0);
}

.modern-card-body {
  padding: var(--space-lg);
}

/* Accessibility enhancements */
.modern-card-header[aria-expanded="false"] {
  border-bottom: none;
}

/* Focus indicators for keyboard navigation */
.modern-card-action-btn:focus-visible,
.modern-card-collapse-btn:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Loading state */
.modern-card.loading {
  opacity: 0.7;
  pointer-events: none;
}

.modern-card.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary-200);
  border-top: 2px solid var(--primary-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Enhanced states */
.modern-card.major-card {
  position: relative;
}

.modern-card.major-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
}

/* Variants */
.modern-card.success-variant::before {
  background: linear-gradient(90deg, var(--success-500), var(--success-600));
}

.modern-card.warning-variant::before {
  background: linear-gradient(90deg, var(--warning-500), var(--warning-600));
}

.modern-card.error-variant::before {
  background: linear-gradient(90deg, var(--error-500), var(--error-600));
}

/* Responsive design */
@media (max-width: 768px) {
  .modern-card-header {
    padding: var(--space-md);
  }
  
  .modern-card-body {
    padding: var(--space-md);
  }
  
  .modern-card-header-actions {
    gap: var(--space-xs);
    margin-left: var(--space-sm);
  }
  
  .modern-card-action-btn,
  .modern-card-collapse-btn {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }
  
  .modern-card-header-content {
    font-size: 0.8125rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .modern-card {
    border-width: 2px;
  }
  
  .modern-card-action-btn,
  .modern-card-collapse-btn {
    border-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .modern-card,
  .modern-card-header,
  .modern-card-content,
  .modern-card-action-btn,
  .modern-card-collapse-btn,
  .modern-card-collapse-btn i {
    transition: none;
  }
  
  .modern-card:hover {
    transform: none;
  }
  
  .modern-card-action-btn:hover,
  .modern-card-collapse-btn:hover {
    transform: none;
  }
}