Beetroot Atlas rebrand — theme, landing, and engraved logos (v3)

.changeset/beetroot-atlas-rebrand.md

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+---
+"@btravstack/theme": minor
+---
+
+Beetroot Atlas rebrand — a botanical atlas: engraved, warm, exact.
+
+- Light warm-ivory paper (`oklch(95.5% 0.015 85)`) with sepia ink is now the canonical scheme; dark becomes the "aubergine" scheme on `.dark`.
+- Typography: Fraunces (display serif) + Switzer (body) + JetBrains Mono (code) replace Montserrat.
+- Shape language: hairline rules, near-sharp corners, no decorative shadows, solid (non-frosted) navbar, solid ink hero name, still hero mark (no float, no glow). Motion reduced to near-zero.
+- Non-breaking: all semantic tokens keep their names and the one-knob rebrand contract is unchanged — consumer sites still override only `--accent` (`:root:root { --accent: … }`) and every derived shade follows via `color-mix`. The new ivory paper is hue-neutral, so per-site accents (orange/indigo/green/violet) harmonise without changes.

.hallmark/log.json

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+[
+  {
+    "date": "2026-07-16",
+    "scope": "app",
+    "macrostructure": "Catalogue",
+    "theme": "custom",
+    "theme_axes": "light / high-contrast-serif / chromatic-other (beetroot-pink ~353)",
+    "vibe": "botanical atlas, engraved plates, warm ivory, exact",
+    "enrichment": "Tier-B hand-built SVG engravings (plates + full logo set)",
+    "nav": "N9 edge-aligned",
+    "footer": "Ft1 mast-headed",
+    "brief": "btravstack org rebrand v3 — Beetroot Atlas (editorial botanical), replaces rejected v1 Riso + v2 Soft"
+  },
+  {
+    "date": "2026-07-16",
+    "scope": "app",
+    "macrostructure": "Bento Grid",
+    "theme": "custom",
+    "theme_axes": "light / rounded-sans / chromatic-other (beetroot-pink ~353)",
+    "vibe": "warm, rounded, charming beetroot, soft-but-exact",
+    "enrichment": "H9 original gradient mascot (Tier-B, restored)",
+    "nav": "N1b",
+    "footer": "Ft8 marquee",
+    "brief": "btravstack org rebrand v2 — Beetroot Soft (REJECTED by user; PR #28)"
+  },
+  {
+    "date": "2026-07-16",
+    "scope": "app",
+    "macrostructure": "Manifesto",
+    "theme": "custom",
+    "theme_axes": "light / display-heavy / chromatic-other (beetroot-pink ~353)",
+    "vibe": "beetroot risograph, contract-as-document, raw, technical",
+    "enrichment": "Tier-B hand-built SVG (flat riso logo set)",
+    "nav": "N7 brutal slab",
+    "footer": "Ft4 dense colophon",
+    "brief": "btravstack org rebrand v1 — Beetroot Riso (REJECTED by user; PR #27)"
+  }
+]