1. types: `<image>`: `<gradient>`: `radial-gradient()`

  2. types: `<image>`: `<gradient>`: `radial-gradient()`: `at` syntax

  3. types: `<image>`: `<gradient>`: `radial-gradient()`: double-position color stops

  4. types: `<image>`: `<gradient>`: `radial-gradient()`: hue interpolation method

  5. types: `<image>`: `<gradient>`: `radial-gradient()`: interpolation color space

  6. types: `<image>`: `<gradient>`: `radial-gradient()`: interpolation hints / gradient midpoints

  7. types: `<image>`: `<gradient>`: `radial-gradient()`: gradients applied to pre-multiplied color space (prevents grays from appearing in gradients with transparency)

  8. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`

  9. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: `at` syntax

  10. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: double-position color stops

  11. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: hue interpolation method

  12. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: interpolation color space

  13. types: `<image>`: `<gradient>`: `repeating-radial-gradient()`: interpolation hints / gradient midpoints