Standard header pattern — brand + main nav on the left, the account action on
the right. New .portal class does margin-left:auto plus a subtle acid tint so
it reads as a button, not another nav item. Applied on all four pages
(landing, docs, portal, theseus); the label is '🔑 Sign in' everywhere
(portal.html itself still marks it .here).
The landing kept expanding whenever documentation was added inline. Moving it
to its own subdirectory gives docs room to grow and keeps the landing to the
"try it / roadmap / verify" story it's supposed to be.
* docs/index.html — TOC + eight sections (TLD registry, registration,
records, resolver, mainnet pricing, tracker, verification, runbook).
Reads on its own; no dependency on the landing.
* index.html — #docs section shrunk to a one-paragraph call-to-action with a
prominent "Open the docs →" button; nav Docs link now points at /docs/.
* portal.html + theseus/index.html — nav Docs links updated to /docs/ (was
./#docs / ../#docs) so every subpage points at the standalone docs.
