Design a high-fidelity desktop web UI mockup, 16:10, rendered as a flat screenshot -- no browser chrome, no laptop frame, no hands, no desk, no perspective.

Brand: Subnaut. A developer tool. Tone: precise, quiet, engineered. Not playful, no gradients, no glow, no 3D, no stock-photo people, no purple-blue SaaS look.

Palette, used exactly:
  background   #ffffff
  raised panel #fbfbfa
  primary text #0a0a0a
  body text    #46464a
  muted text   #8a8a90
  hairline     #e8e8e6
  accent       #12a37a  (a restrained green -- use sparingly, for one action only)

Type: a clean grotesque sans (Inter/Helvetica feel) for prose. A monospace face for labels, eyebrows, code and buttons -- uppercase, wide letter-spacing, small.

Layout: generous whitespace, a strict 12-column grid, thin 1px hairline rules as the main separator instead of borders or shadows. Left-aligned. Flat.

Mood reference: the Bittensor site, Linear's docs, Stripe's density -- engineering documentation, not a marketing splash.

Page: product home.

Above the fold: a short headline "The agent that learns your work", one supporting sentence beneath it in muted grey, and a single install command shown in a bordered monospace strip with a small copy icon at its right edge:
  curl -fsSL https://tryimagent.com/install.sh | bash

To the right of the headline, an abstract mark: a circle of about 14 small nodes joined by thin straight chords, a Greek tau at its centre. Monoline, hairline weight, accent colour, no fill, no glow.

Below, four sections separated by full-width hairline rules, each a short heading with two or three sentences beside it in two columns:
  "It gets better at your work, not just at work."
  "The same agent, wherever you are working."
  "Your keys. Your files. Your hardware."
  "Tools, not just answers."

Top bar: wordmark left; monospace uppercase links right -- DOCS, SKILLS, SIGN IN.
Footer: hairline rule, small muted monospace links.

Only one accent-coloured element on the whole page.

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If the result is wrong, reply with one of these:
  Use the accent on exactly one element. Everything else is black, grey and white.
  Remove all gradients, shadows, rounded cards and illustrations. Flat, hairline rules only.
  Double the whitespace. Reduce to half the elements.

Dark theme: background #0a0a0a, raised #131313, primary text #f4f4f5, muted #9b9ba3, hairline #26262b, accent #4fc69a.
Mobile: render at 9:16, single column, hamburger in the top bar.
