Dark Academia Product Detail

Act like a frontend developer with 15 years of experience. I want the exact same UI with 95-99% similarity.

Platform: This is a RESPONSIVE design — it should work on both mobile and desktop. Use mobile layout patterns (bottom nav, stacked content) for mobile, and desktop layout patterns (sidebar/nav bar, wider content areas) for web.

Design a product detail screen with a large image area, product title and price, a star rating row, size selector chips, a short description, and a sticky add-to-cart bar at the bottom.

Visual style — Dark Academia:
Deep wood-brown and leather tones with ornate thin gold-foil rule lines framing cards, classic serif display headings evoking old library books, and small candle-lit vignette shading in corners. Scholarly, moody, gothic-library aesthetic.

Color palette — Leather Gold:
Background #1B140F, surfaces #241B14. Text #EDE0CC. Accent gold #B08A3E.

Typography — use these exact font families:
- Headings / display: Georgia, "Playfair Display", serif
- Body / labels: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif

Commit fully to this style — it should be unmistakable at a glance. Use realistic content, not placeholder text. Keep animations smooth (200ms ease-out).