Japanese Self-Help Book Cover Mockup

A realistic 3D mockup of a softcover book standing upright at a slight angle on a plain off-white background, revealing both the front cover and the spine. The cover features a minimalist, serene illustration of a white arched doorway opening to a bright pastel sunrise over a calm sea, with a woman in a flowing white dress standing in the archway looking toward the horizon. Large, elegant vertical Japanese text in a Mincho serif font dominates the right and left sides of the arch, reading main_title. In the top left corner, smaller horizontal text reads subtitle. The bottom third of the book is wrapped in a light pink belly band. The band features a prominent horizontal catchphrase reading obi_catchphrase, with smaller text above it separated by a dotted line mentioning work, relationships, love, and future anxiety. On the right side of the band is a white circular badge with a small crown icon and text reading sales_badge_text. At the very bottom of the band are exactly 4 small rectangular boxes containing keywords about self-esteem, time management, mental organization, and ideal future, followed by the text "Everything will change!". The spine is white and displays the main title, subtitle, a placeholder for the author's name, and a placeholder for the publisher.