/* ================================================
   CSS VARIABLES - Design System
   Luxury Resale Platform - Valencia, Spain
   ================================================ */

:root {
  /* === COLOR PALETTE === */
  /* Primary Colors - Elegant & Timeless */
  --color-primary: #1a1a1a;
  --color-primary-light: #2d2d2d;
  --color-secondary: #c9a961;
  --color-secondary-light: #d4b976;
  
  /* Neutral Colors */
  --color-background: #ffffff;
  --color-background-alt: #fafaf8;
  --color-surface: #f5f5f3;
  
  /* Text Colors */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #666666;
  --color-text-light: #999999;
  --color-text-inverse: #ffffff;
  
  /* Accent & Status Colors */
  --color-accent: #c9a961;
  --color-success: #4a7c59;
  --color-error: #d14343;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  
  /* === TYPOGRAPHY === */
  --font-primary: 'Cormorant Garamond', 'Georgia', serif;
  --font-secondary: 'Libre Franklin', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.375rem);
  --font-size-xl: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --font-size-2xl: clamp(2rem, 1.7rem + 1.5vw, 3rem);
  --font-size-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  --letter-spacing-wider: 0.1em;
  
  /* === SPACING (unified) === */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;
  
  /* Alias for compatibility */
  --spacing-xs: var(--space-xs);
  --spacing-sm: var(--space-sm);
  --spacing-md: var(--space-md);
  --spacing-lg: var(--space-lg);
  --spacing-xl: var(--space-xl);
  --spacing-2xl: var(--space-2xl);
  --spacing-3xl: var(--space-3xl);
  --spacing-4xl: var(--space-4xl);
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* === BORDERS & RADIUS === */
  --border-width-thin: 1px;
  --border-width-medium: 2px;
  --border-width-thick: 4px;
  
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-full: 9999px;
  
  /* === SHADOWS === */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  
  /* === TRANSITIONS === */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Easing Functions */
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* === Z-INDEX SCALE === */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;
  --z-max: 9999;
  
  /* Alias */
  --z-modal: var(--z-index-modal);
  
  /* === GRID & LAYOUT === */
  --grid-gap: var(--space-lg);
  --grid-columns: 12;
}

/* === DARK MODE SUPPORT === */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0a0a0a;
    --color-background-alt: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #b3b3b3;
    --color-border: #404040;
    --color-border-light: #333333;
  }
}