Vintage Sepia 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 — Vintage Sepia:
A warm sepia-toned background with a subtle film-grain and vignette texture, ornate thin double-rule borders, and a classic serif display type reminiscent of old photographs and letterpress. An aged-paper texture on card surfaces. Nostalgic, antique, old-photograph warmth.

Color palette — Faded Rose:
Background #E9D6D2. Text #3A2825. Rules #7A5450.

Typography — use these exact font families:
- Headings / display: Georgia, "Times New Roman", 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).