Create a minimal geometric SVG logo for a developer API tool named “Curlex” using a monogram combining the letters “C” and “X”. The design should integrate a curved “C” shape with a sharp angular “X” element inside or intersecting it. The “C” should be a smooth arc with clean circular geometry, while the “X” should be constructed from two equal diagonal strokes forming a precise cross. The composition must be extremely simple, bold, and readable at 16px size. Use monoline strokes or solid shapes with consistent thickness. Ensure strong contrast, perfect centering, and balanced negative space. No text, no gradients, no shadows, flat SVG icon style, optimized for app favicon and system tray usage. Return output as clean, valid SVG code only.

The image shows the Curtex logo on a white background. The logo consists of the text "Curtex" in bold black font, with the letter "C" in the center. The text is surrounded by a thin black border, giving the logo a modern and professional look.