:root {
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-active: #1d4ed8;
  --color-secondary: #6b7280;
  --color-secondary-hover: #4b5563;
  --color-error: #ef4444;
  --color-success: #10b981;
  --color-background: #f9fafb;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

.features-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.section-description {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

.editor-container {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--color-border);
}

.feature-form {
  display: grid;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-color: var(--color-surface);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.error-message {
  color: var(--color-error);
  font-size: 0.875rem;
  min-height: 1.25rem;
}

.form-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  gap: var(--spacing-xs);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  background-color: var(--color-primary-active);
  transform: translateY(1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-background);
  border-color: var(--color-secondary);
  color: var(--color-secondary-hover);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  padding: var(--spacing-xs);
}

.btn-ghost:hover {
  background-color: var(--color-background);
  color: var(--color-text);
}

.btn-danger {
  color: var(--color-error);
}

.btn-danger:hover {
  background-color: #fef2f2;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s, transform 0.2s;
  position: relative;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  line-height: 1;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: var(--spacing-md);
}

.card-actions {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: flex-end;
  opacity: 0;
  transition: opacity 0.2s;
}

.feature-card:hover .card-actions {
  opacity: 1;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
}

.hidden {
  display: none !important;
}

@media (max-width: 768px) {
  .features-section {
    padding: var(--spacing-md);
  }
  
  .section-header h1 {
    font-size: 1.5rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .card-actions {
    opacity: 1;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}