Dragón de fantasía art nouveau, mandala para calcar

Black-and-white coloring page illustration of: fantasy dragon adult. Audience: adults (relaxation), intricate (mandala-level) detail, art nouveau drawing style. Pure black outlines on white background, no shading, no fill, no grayscale, no gradient. Closed shapes ready for crayon / marker. Clean printable line-art at high contrast, no watermarks. Wholesome family-friendly imagery only. No graphic content, no scary or violent themes for kids audiences. Specifically: fantasy dragon adult. Target search intent (rendered visually, no on-image text): "mandala para calcar" (es).