/**
 * CSS Variables for Theme Customization - Visit Planner Site
 * 
 * Define all theme colors, spacing, typography here.
 * When switching Bootstrap versions, update these variables
 * instead of changing values throughout your CSS.
 */

:root {
  /* ============================================
     COLORS
     ============================================ */
  
  /* Primary colors */
  --color-primary: #007bff;
  --color-secondary: #6c757d;
  --color-success: #28a745;
  --color-info: #17a2b8;
  --color-warning: #ffc107;
  --color-danger: #dc3545;
  --color-light: #f8f9fa;
  --color-dark: #343a40;
  
  /* Brand colors */
  --color-brand-primary: #007bff;
  --color-brand-secondary: #6c757d;
  
  /* Text colors */
  --color-text-primary: #212529;
  --color-text-secondary: #6c757d;
  --color-text-muted: #6c757d;
  --color-text-white: #fff;
  
  /* Background colors */
  --color-bg-body: #fff;
  --color-bg-light: #f8f9fa;
  --color-bg-dark: #343a40;
  
  /* Border colors */
  --color-border: #dee2e6;
  --color-border-light: #e9ecef;
  --color-border-dark: #adb5bd;
  
  /* Link colors */
  --color-link: #007bff;
  --color-link-hover: #0056b3;
  
  /* ============================================
     SPACING
     ============================================ */
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Form spacing */
  --form-group-margin: 1rem;
  --form-label-margin: 0.5rem;
  --form-control-padding-y: 0.375rem;
  --form-control-padding-x: 0.75rem;
  
  /* ============================================
     TYPOGRAPHY
     ============================================ */
  
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --font-size-base: 1rem;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.75rem;
  --font-size-h4: 1.5rem;
  --font-size-h5: 1.25rem;
  --font-size-h6: 1rem;
  
  --line-height-base: 1.5;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  
  /* ============================================
     BORDERS & SHADOWS
     ============================================ */
  
  --border-width: 1px;
  --border-radius: 0.25rem;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  
  /* ============================================
     GRID & LAYOUT
     ============================================ */
  
  --grid-gutter-width: 1.5rem;
  --container-max-width-xl: 1140px;
  
  /* ============================================
     TRANSITIONS
     ============================================ */
  
  --transition-base: all 0.2s ease-in-out;
}