:root {
    /* --- TYPOGRAPHY --- */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* --- DIMENSIONS --- */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --header-height: 70px;
    
    /* --- SPACING & RADIUS --- */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* --- TRANSITIONS --- */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* --- Z-INDEX --- */
    --z-sidebar: 1040;
    --z-header: 1030;
    --z-dropdown: 1050;
    --z-modal: 1060;
}

/* Base Reset */
body {
    font-family: var(--font-primary);
    background-color: var(--bg-body);
    color: var(--text-main);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a { text-decoration: none; }

/* Scrollbar Styling */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }