Act as a seasoned speculative fiction author with expertise in worldbuilding. Craft a vivid opening chapter for a novel set in [PLANET NAME], where all vegetation grows inverted—roots stretching skyward and canopies buried underground. Describe how this affects [SOCIETY NAME]'s culture, architecture, and daily life. Focus particularly on [PROTAGONIST NAME], a [UNIQUE OCCUPATION] who discovers a dark secret about the origins of this botanical anomaly. Include sensory details about the eerie beauty of glowing root systems illuminating cavernous spaces, and the constant danger of [SPECIFIC HAZARD] from the unstable ground forests. Set the tone as [GENRE: e.g., eco-horror, hopeful solarpunk, or mystery] while hinting at the larger cosmological truth behind the upside-down ecosystem.