:root {
    /* Colors — Primary */
    --color-primary: #3B82F6;
    --color-primary-hover: #2563EB;
    --color-primary-light: #EFF6FF;
    --color-primary-dark: #1D4ED8;

    /* Colors — Semantic */
    --color-success: #10B981;
    --color-success-hover: #059669;
    --color-success-light: #ECFDF5;
    --color-warning: #F59E0B;
    --color-warning-hover: #D97706;
    --color-warning-light: #FFFBEB;
    --color-danger: #EF4444;
    --color-danger-hover: #DC2626;
    --color-danger-light: #FEF2F2;
    --color-info: #6366F1;
    --color-info-hover: #4F46E5;
    --color-info-light: #EEF2FF;

    /* Colors — Surface & Background */
    --color-bg: #F1F5F9;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F8FAFC;
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;

    /* Colors — Text */
    --color-text: #1E293B;
    --color-text-secondary: #475569;
    --color-muted: #64748B;
    --color-inverse: #FFFFFF;

    /* Colors — Sidebar */
    --color-sidebar-bg: #0F172A;
    --color-sidebar-text: #94A3B8;
    --color-sidebar-text-active: #FFFFFF;
    --color-sidebar-hover: #1E293B;
    --color-sidebar-active: #3B82F6;
    --color-sidebar-border: #1E293B;

    /* Colors — Header */
    --color-header-bg: #FFFFFF;
    --color-header-border: #E2E8F0;

    /* Typography */
    --font-family: 'Vazirmatn', system-ui, -apple-system, 'Segoe UI', Tahoma, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 0px;
    --header-height: 56px;
    --container-max: 1200px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;

    /* Z-index */
    --z-sidebar: 100;
    --z-header: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
}