Skeuomorphic Chat Conversation

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 chat screen with a header showing avatar, name and online status, alternating incoming and outgoing message bubbles with timestamps, and a rounded input bar with an attach icon and a send button.

Visual style — Skeuomorphic:
Buttons and cards mimic real-world material — brushed-metal gradients, a glossy top highlight on buttons, and realistic drop shadows with a consistent light direction. Rounded 8px corners. Detailed and tactile, in the vein of pre-flat-design (iOS 6 era) interfaces.

Color palette — Leather Brown:
Background #E9DCC9, surfaces gradient #F5EBD8 to #D9C6A3. Text #3A2A18. Accent brass #B08A3E.

Typography — use these exact font families:
- Headings / display: -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif
- Body / labels: -apple-system, BlinkMacSystemFont, "SF Pro Text", 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).