Mockup Buchcover for Whimsical Children's Poetry Watercolor

Self-publishing book cover design for: poetry watercolor wash. Genre: children's picture book, collage / mixed media cover archetype, playful whimsical mood, royal purple palette. Render with title and author placeholder text rendered cleanly in matching typography. Print-ready 5:8 portrait composition. Polished publisher-quality design, no watermarks. No copyrighted franchise look-alikes. No real-author photos. Title text rendered sharp and readable. Specifically: poetry watercolor wash. Target search intent (rendered visually, no on-image text): "mockup buchcover" (en).