/* ===================================================================
   VoxAssist Design Tokens
   Purpose: Centralized design system variables and high-contrast mode
   ================================================================ */

:root {
    /* Primary Colors - Indigo */
    --color-primary: #4F46E5;
    --color-primary-hover: #4338CA;
    --color-primary-active: #3730A3;
    
    /* Secondary Colors - Orange */
    --color-secondary: #EA580C;
    --color-secondary-hover: #C2410C;
    --color-secondary-active: #9A3412;
    
    /* Status Colors */
    --color-success: #16A34A;
    --color-danger: #DC2626;
    --color-warning: #EA580C;
    --color-info: #3B82F6;
    
    /* Neutral Colors - Light Mode */
    --color-background: #FFFFFF;
    --color-surface: #F9FAFB;
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --color-border: #E5E7EB;
    
    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --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);
    
    /* Animation Durations */
    --duration-fast: 150ms;
    --duration-base: 200ms;
    --duration-slow: 300ms;
    --duration-slower: 400ms;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-modal: 1050;
    --z-tooltip: 1100;
}

/* Dark Mode Tokens */
.dark, [data-theme="dark"] {
    --color-background: #1C1917;
    --color-surface: #292524;
    --color-text-primary: #FAFAF9;
    --color-text-secondary: #A8A29E;
    --color-border: #44403C;
}

/* ===================================================================
   High-Contrast Mode Support (T137)
   Purpose: Enhanced contrast for users with low vision
   ================================================================ */

@media (prefers-contrast: high) {
    :root {
        /* Deeper Indigo */
        --color-primary: #3730A3;
        --color-primary-hover: #312E81;
        --color-primary-active: #1E1B4B;
        
        /* Brighter Orange */
        --color-secondary: #F97316;
        --color-secondary-hover: #EA580C;
        --color-secondary-active: #C2410C;
        
        /* Enhanced Status Colors */
        --color-success: #15803D;
        --color-danger: #B91C1C;
        --color-warning: #C2410C;
        --color-info: #1D4ED8;
        
        /* Higher Contrast Text */
        --color-text-primary: #000000;
        --color-text-secondary: #374151;
        --color-border: #000000;
        
        /* Stronger Shadows */
        --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    }
    
    /* Dark Mode High Contrast */
    .dark, [data-theme="dark"] {
        --color-background: #000000;
        --color-surface: #171717;
        --color-text-primary: #FFFFFF;
        --color-text-secondary: #D4D4D4;
        --color-border: #FFFFFF;
        
        /* Brighter colors in dark mode */
        --color-primary: #6366F1;
        --color-secondary: #FB923C;
    }
    
    /* Enhanced Button Contrast */
    button:not(:disabled),
    .btn:not(:disabled) {
        border-width: 2px;
        font-weight: 600;
    }
    
    /* Enhanced Input Contrast */
    input:not([type="checkbox"]):not([type="radio"]),
    textarea,
    select {
        border-width: 2px;
        border-color: var(--color-border);
    }
    
    input:focus,
    textarea:focus,
    select:focus {
        outline: 3px solid var(--color-primary);
        outline-offset: 2px;
    }
    
    /* Enhanced Link Contrast */
    a {
        text-decoration: underline;
        text-decoration-thickness: 2px;
    }
    
    a:hover {
        text-decoration-thickness: 3px;
    }
}

/* ===================================================================
   Forced Colors Mode (Windows High Contrast)
   Purpose: Respect Windows High Contrast themes
   ================================================================ */

@media (forced-colors: active) {
    * {
        /* Use system colors */
        color: CanvasText;
        background-color: Canvas;
    }
    
    button,
    .btn {
        border: 2px solid ButtonText;
        background-color: ButtonFace;
        color: ButtonText;
    }
    
    button:hover,
    .btn:hover {
        background-color: Highlight;
        color: HighlightText;
        border-color: HighlightText;
    }
    
    button:focus,
    .btn:focus {
        outline: 3px solid Highlight;
        outline-offset: 2px;
    }
    
    a {
        color: LinkText;
        text-decoration: underline;
    }
    
    a:visited {
        color: VisitedText;
    }
    
    /* Preserve transparent for icons/decorative elements */
    svg,
    .icon {
        forced-color-adjust: auto;
    }
}

/* ===================================================================
   CSS Custom Properties Usage Examples
   ================================================================ */

/*
Example usage in components:

.my-primary-button {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: var(--font-family-base);
    transition-duration: var(--duration-base);
}

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

.my-card {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}
*/