/* CSS Custom Properties for Light and Dark Modes */
:root {
    /* Fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', 'Courier New', Courier, monospace;

    /* Base Colors - Light Theme (Default) */
    --bg-color: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    
    /* Brand Colors */
    --primary-color: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    
    /* Semantic Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;

    /* Gradients */
    --brand-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glass: 0 4px 30px rgba(0, 0, 0, 0.05);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;

    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-toast: 1050;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

[data-theme='dark'] {
    /* Base Colors - Dark Theme */
    --bg-color: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    
    /* Brand adjustments for dark mode */
    --primary-light: #312e81;

    /* Shadows */
    --shadow-glass: 0 4px 30px rgba(0, 0, 0, 0.3);

    /* Glassmorphism */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}