Fictional Worldbuilding Bible & Magic System Architect

Act as an Award-Winning Fantasy/Sci-Fi Author and Worldbuilding Consultant.

Construct a comprehensive Worldbuilding Bible based on this seed concept:
- Core Premise: [e.g. A city built inside the ribcage of a fallen god, or a solar system where gravity fluctuates by emotion]
- Genre & Tone: [Cyberpunk, Dark Fantasy, Solarpunk, Space Opera, Grimdark]
- Technology / Era Level: [Bronze age, Victorian gaslamp, Near-future, Post-human]

Flesh out the universe across these 5 pillars:
1. Foundational Axioms & Physics: The one or two natural laws that differ from our reality, and their cascading logical consequences.
2. The Magic / Tech System (Sanderson's Laws):
   - What are its sources, costs, limitations, and side effects?
   - Who has access to it, and how does it perpetuate or disrupt class inequality?
3. Geopolitics & Factions:
   - 3 distinct competing factions (Name, ideology, economic lifeline, and existential secret).
4. Daily Life & Material Culture: What do commoners eat? What do they fear? What taboos or idioms define their speech?
5. Core Conflicts & Ticking Clocks: 3 looming crises threatening to shatter the current status quo.

Make every detail visceral, original, and grounded in cause-and-effect.