/**
 * Theme Variable Usage Examples
 * 
 * This file demonstrates how to refactor existing CSS to use theme variables.
 * Copy these patterns when updating component styles.
 */

/* ============================================
   BEFORE: Hardcoded values
   ============================================ */
.button-old {
  background: #007bff;
  color: white;
  padding: 0.6em 1.2em;
  border-radius: 4px;
  border: none;
  font-size: 1em;
  transition: 0.2s;
}

.button-old:hover {
  background: #0056b3;
}

/* ============================================
   AFTER: Using theme variables
   ============================================ */
.button-new {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--button-padding-y) var(--button-padding-x);
  border-radius: var(--button-border-radius);
  border: none;
  font-size: var(--font-size-base);
  font-weight: var(--button-font-weight);
  transition: var(--transition-base);
  cursor: pointer;
}

.button-new:hover {
  background: var(--color-primary-hover);
}

/* ============================================
   MORE EXAMPLES
   ============================================ */

/* Input Field */
.input-field {
  padding: var(--input-padding-y) var(--input-padding-x);
  border: var(--border-width-thin) solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  transition: var(--transition-base);
}

.input-field:focus {
  outline: none;
  border-color: var(--input-focus-border-color);
  box-shadow: var(--input-focus-shadow);
}

/* Card Component */
.card {
  background: var(--card-bg);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
  margin-bottom: var(--spacing-md);
}

/* Modal */
.modal-overlay {
  background: var(--modal-backdrop-bg);
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.modal-content {
  background: var(--modal-bg);
  padding: var(--modal-padding);
  border-radius: var(--modal-border-radius);
  max-width: var(--modal-max-width);
  box-shadow: var(--shadow-xl);
}

/* Text Styles */
.heading-primary {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.text-muted {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Spacing Examples */
.section {
  margin-bottom: var(--spacing-xl);
}

.field-group {
  margin-bottom: var(--spacing-md);
}

/* Border Examples */
.divider {
  border-bottom: var(--border-width-thin) solid var(--color-border-light);
  margin: var(--spacing-lg) 0;
}

/* ============================================
   BENEFITS OF USING THEME VARIABLES
   ============================================
   
   1. Consistency: All components use the same colors/spacing
   2. Maintainability: Change once, update everywhere
   3. Theme switching: Easy to implement dark mode
   4. Scalability: Add new colors/sizes without touching components
   5. Documentation: Variable names are self-documenting
   
*/
