:root {
    color-scheme: light;
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-primary: #1e40af;
    --color-primary-hover: #1d3aa1;
    --color-primary-contrast: #ffffff;
    --color-danger: #b91c1c;
    --color-danger-bg: #fee2e2;
    --color-success: #15803d;
    --color-success-bg: #dcfce7;
    --color-warn: #b45309;
    --color-warn-bg: #fef3c7;
    --color-border: #e5e7eb;
    --color-nav-bg: #1f2937;
    --color-nav-text: #e5e7eb;
    --color-nav-hover: #374151;
    --color-nav-active: #1e40af;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    --radius-sm: 4px;
    --radius-md: 8px;

    --font-mono: ui-monospace, "Cascadia Mono", "Consolas", monospace;
    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-contrast: #ffffff;
    --color-danger: #f87171;
    --color-danger-bg: #4c1d1d;
    --color-success: #4ade80;
    --color-success-bg: #14532d;
    --color-warn: #fbbf24;
    --color-warn-bg: #4d3a0e;
    --color-border: #334155;
    --color-nav-bg: #0b1220;
    --color-nav-text: #e2e8f0;
    --color-nav-hover: #1e293b;
    --color-nav-active: #2563eb;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
}