:root {
      color-scheme: light;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
      --background: #f2f5fa;
      --surface: #ffffff;
      --surface-soft: #f7f9fc;
      --text: #172033;
      --muted: #6b7280;
      --line: #dce2ec;
      --primary: #2563eb;
      --success: #15803d;
      --danger: #b42318;
      --shadow: 0 22px 60px rgba(31, 41, 55, 0.13);
    }