/* Modern SaaS Design System Variables */
:root {
    /* Core Palette */
    --color-app-bg: #F6F8FC;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F8FAFC;
    --color-surface-active: #F1F5F9;
    
    /* Primary & Brand */
    --color-primary-navy: #111827;
    --color-sidebar-bg: #0F172A;
    --color-sidebar-secondary: #172033;
    --color-sidebar-hover: #1E293B;
    --color-sidebar-active: #312E81;
    --color-sidebar-text: #94A3B8;
    --color-sidebar-text-active: #FFFFFF;
    --color-sidebar-border: #1E293B;
    
    --color-primary-indigo: #4F46E5;
    --color-primary-hover: #4338CA;
    --color-primary-active: #3730A3;
    --color-soft-indigo: #EEF2FF;
    --color-soft-indigo-border: #C7D2FE;
    
    /* Typography */
    --color-text-heading: #111827;
    --color-text-body: #475569;
    --color-text-muted: #64748B;
    --color-text-light: #94A3B8;
    
    /* Borders & Dividers */
    --color-border: #E2E8F0;
    --color-border-hover: #CBD5E1;
    --color-border-focus: #4F46E5;
    
    /* Semantic / Status Colors */
    --color-success: #16A34A;
    --color-success-bg: #F0FDF4;
    --color-success-border: #BBF7D0;
    --color-success-text: #15803D;

    --color-warning: #D97706;
    --color-warning-bg: #FFFBEB;
    --color-warning-border: #FDE68A;
    --color-warning-text: #B45309;

    --color-error: #DC2626;
    --color-error-bg: #FEF2F2;
    --color-error-border: #FECACA;
    --color-error-text: #B91C1C;

    --color-info: #0284C7;
    --color-info-bg: #F0F9FF;
    --color-info-border: #BAE6FD;
    --color-info-text: #0369A1;

    --color-neutral: #64748B;
    --color-neutral-bg: #F8FAFC;
    --color-neutral-border: #E2E8F0;

    /* Typography Scale */
    --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-base: 14px;
    --font-size-md: 15px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 22px;
    --font-size-3xl: 28px;
    --font-size-metric: 32px;

    /* Spacing Scale */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 9px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --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, 0.05), 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);
    --shadow-focus: 0 0 0 3px rgba(79, 70, 229, 0.15);

    /* Layout Constraints */
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 72px;
    --header-height: 64px;
    --max-content-width: 1400px;
}