[craig-o-curtis]

Closes #15.

Huginn and the page coming in

• Card order (Card reveal order is hard-coded to two cards, child site nav back header #15). The fly-in no longer assumes header, card, card. Each box says what it is (header, card or text). A card is drawn in as Huginn flies over it or makes his closest pass by it, and no later than a set time after the card before it along his line, so any number of cards works. Checked with a temporary third card.
• Coming back. From another of the site's pages (the GMT or worktree docs), or by Back or Forward, the header stays put; the title, intro and cards come in again. A fresh visit or a reload plays the full entrance.
• The homecoming. On a return Huginn flies home toward the viewer instead of in over the shoulder: from the side of the card for the page left, past the cards and out over the top or a side, never out the bottom. About 2 in 5 pass as close as the first fly-in. Gliding speed is a raven's own (6–8 m/s), and the page is back within 3 s, with a backstop on the page in case the sky is slow.
• Smoother first fly-in on phones. The skyline lift no longer bends his line sharply when he is a few metres away.

Header

• The GitHub and Discord icons are the shield's ice instead of cyan. The sonar focus ping stays cyan.

A more realistic aurora (a nod to worktree's greens)

• New theme tokens --gmt-aurora-green, --gmt-aurora-red, --gmt-aurora-fringe: oxygen's 557.7 nm and 630 nm lines and nitrogen's pink-magenta.
• Colour by altitude: green body, faint red atop tall rays, pink lower fringe while active. A faint green airglow band sits above the horizon.
• Mostly quiet, with an occasional surge: brighter, more rayed, faster, deeper folds.
• The water is a truer mirror. Ripples tilt the reflection by a degree or two, and below the skyline it mirrors the dark mountains or city.
• Ísafjörður shows its fjord. The skyline builder now records water seen from land (Copernicus DEM), and the rebuilt Ísafjörður skyline cuts that window into the mountains; the ridge itself is unchanged. With the far mountains about 2° high, the fjord mirrors them, and the aurora shows as glints where ripples catch it.

Previewing (dev server only)

• ?huginn=return or ?huginn=first picks the fly-in. &from=/gmt/ sets the page to come back from.
• ?aurora=active or ?aurora=calm holds the aurora in a surge or quiet.

Checks

pnpm lint && pnpm format:check && pnpm check && pnpm build pass on each commit.

[craig-o-curtis]

/craig-review

[craigs-reviewer]

code-reviewer: minor issues

This PR makes the fly-in order kind-based and handles any number of cards. It adds a homecoming flight for return visits, with the header kept in place, and reworks the aurora shading: emission colours, activity surges, a skyline-aware water mirror and the Ísafjörður near-shore strip. I traced the target indexing, the CSS precedence between ng-return and ng-await, the near-strip vertex counts and the two-byte ridge texture packing and unpacking, and found them consistent. The only point worth checking is that the homecoming is planned in one synchronous burst on a frame. The other two findings are small suggestions.

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_{Reviewed b1f8831 for craig-o-curtis · claude-opus-5-5 · 11 files · $1.06}

[craig-o-curtis]

Thanks for the review. All three comments are addressed, one commit each, now pushed:

• 04ba939: the frame after a homecoming is planned is left out of the 60 fps pacing check. Planning measured 0.2–4.5 ms here.
• 3bc51fd: the card come back from is matched by its own docs path (data-ng-path), so off-site links take no part and the dev preview still works.
• e843c15: the aurora tokens live in their own tokens-aurora.css, and tokens.css is back to the copy from GMT. A missing token now reads as black, not the previous colour.

pnpm lint && pnpm format:check && pnpm check && pnpm build pass.