Create an official mascot for the illustration submission website 'pAinter' that is not a person. The mascot should be an anthropomorphic digital paintbrush, with a friendly and inviting appearance. The digital paintbrush is sleek and modern, with a vibrant color palette reflecting creativity and artistry. It has expressive eyes and a smile on the brush part, giving it a lively character. The mascot is holding a digital tablet stylus, symbolizing the blend of traditional art and digital innovation. The background should be simple and clean to highlight the mascot.