:root {
    /* Colors - Dark Theme SaaS */
    --bg-base: #0f172a;        /* Deep slate background */
    --bg-surface: #1e293b;     /* Card/Surface background */
    --bg-surface-hover: #334155;
    
    --primary: #3b82f6;        /* Modern Blue */
    --primary-hover: #2563eb;
    --secondary: #475569;
    --secondary-hover: #64748b;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-light: #475569;

    /* Status Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    
    /* Spacing & Layout */
    --container-max-width: 1024px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
}