/* --- DESIGN TOKENS (THE ARCHITECTURAL PRECISION) --- */
:root {
    /* === SPACING SYSTEM (Strict 8px Grid) === */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2rem;     /* 32px */
    --space-xl: 3rem;     /* 48px */
    --space-2xl: 4rem;    /* 64px */
    --space-3xl: 6rem;    /* 96px */

    /* === BORDER RADIUS (Standard: 12px) === */
    --radius-none: 0;
    --radius-sm: 4px;
    --radius-default: 12px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-3xl: 32px;
    --radius-full: 9999px;

    /* === ASPECT RATIOS === */
    --aspect-product: 4/3;
    --aspect-carousel: 4/2;
    --aspect-video: 16/9;

    /* === TYPOGRAPHY (WebApp Scale) === */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.8125rem;   /* 13px */
    --text-base: 0.875rem; /* 14px */
    --text-lg: 0.9375rem;   /* 15px */
    --text-xl: 1rem;       /* 16px - Refined Target */
    --text-2xl: 1.25rem;   /* 20px */
    --text-3xl: 1.5rem;    /* 24px */
    --text-4xl: 2rem;      /* 32px */
    --text-5xl: 2.5rem;    /* 40px */

    --tracking-tighter: -0.05em;
    --tracking-tight: -0.02em;

    /* === COLORS (Architectural Precision - M3 Tonal Palette) === */
    --color-primary: #0072C0;
    --color-primary-container: #0099ff;
    --color-on-primary: #ffffff;
    
    --color-surface: #f8f9ff;
    --color-surface-dim: #ccdbf3;
    --color-surface-bright: #f8f9ff;
    --color-surface-container-lowest: #ffffff;
    --color-surface-container-low: #eff4ff;
    --color-surface-container: #e5eeff;
    --color-surface-container-high: #dce9ff;
    --color-surface-container-highest: #d5e4fb;
    
    --color-text-primary: #0d1c2d;
    --color-text-secondary: #424752;
    --color-text-tertiary: #515f73;
    --color-text-outline: #727783;
    
    --color-border: #e5efff; /* Tonal boundary - No 1px solid rule */
    --color-outline-variant: rgba(194, 198, 212, 0.2); /* Ghost Border */

    /* === SHADOWS / ELEVATION === */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 8px rgba(13, 28, 45, 0.08);
    --shadow-lg: 0 12px 24px rgba(13, 28, 45, 0.12);
    --shadow-hover: 0 16px 32px rgba(13, 28, 45, 0.15);

    /* === TRANSITIONS === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* === Z-INDEX === */
    --z-base: 1;
    --z-sticky: 100;
    --z-overlay: 200;
    --z-modal: 1000;
}