Ключевые слова: 26, april, author, background, black, brand, business, card, castle, celebration, concept, copyright, creativity, day, design, drawing, education, element, exclusive, flat, free, idea, illustration, imagination, infringement, innovation, intellectual, invention, knowledge, legal, literature, logo, name, original, patent, piracy, property, protection, rights, royalties, sign, silhouette, software, style, symbol, white, world,