/* Design tokens — Light professional palette */
:root {
    /* Backgrounds */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-hover: #F3F4F6;
    --bg-active: #EFF6FF;

    /* Borders */
    --border: #E5E7EB;
    --border-hover: #2563EB;
    --border-focus: #2563EB;

    /* Text */
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-muted: #6B7280;
    --text-dim: #9CA3AF;

    /* Accent - Blue */
    --blue: #2563EB;
    --blue-light: #EFF6FF;
    --blue-text: #1D4ED8;
    --blue-hover: #1D4ED8;

    /* Success / Green */
    --green: #059669;
    --green-bg: #ECFDF5;
    --green-text: #047857;

    /* Error / Red */
    --red: #DC2626;
    --red-bg: #FEF2F2;
    --red-text: #B91C1C;

    /* Warning / Yellow */
    --yellow: #D97706;
    --yellow-bg: #FFFBEB;
    --yellow-text: #B45309;

    /* Purple */
    --purple: #7C3AED;
    --purple-bg: #F5F3FF;
    --purple-text: #6D28D9;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --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);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;

    /* Radii */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Fonts */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* Sizes */
    --text-xs: 0.688rem;
    --text-sm: 0.75rem;
    --text-base: 0.813rem;
    --text-md: 0.875rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.75rem;

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: 56px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
}