Raw Brutalist OTP Verification

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 phone verification screen with six single-digit OTP boxes, a countdown timer for resending the code, and a full-width verify button.

Visual style — Raw Brutalist:
System default fonts at unstyled browser sizes. Zero border-radius everywhere, thick 3px solid black borders, no shadows at all. Underlined links, left-aligned everything, rows of dashes or equals signs used as section dividers instead of rules. Deliberately anti-design — reads like a raw unstyled HTML document.

Color palette — Terminal White:
Background #F0F0F0. Text #1A1A1A. Accent red #CC0000.

Typography — use these exact font families:
- Headings / display: system-ui, -apple-system, 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).