chore: initial commit

Vue 3 + Tailwind v4 frontend scaffold with living design system
at /design. Pinned dependencies, dev-only a11y toolbar with
colour-vision simulation, WCAG contrast checker, and axe-core audit.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/assets/styles.css

@@ -0,0 +1,39 @@
+@import 'tailwindcss';
+@import '../design-system/tokens.css';
+
+html {
+  scroll-behavior: smooth;
+  font-size: 17px;
+}
+
+body {
+  background: var(--color-surface);
+  color: var(--color-ink);
+  font-family: var(--font-sans);
+  line-height: 1.55;
+}
+
+:focus-visible {
+  outline: 2px solid var(--color-brand);
+  outline-offset: 2px;
+  border-radius: 4px;
+}
+
+/* Room above anchor targets when scrolling */
+[id] {
+  scroll-margin-top: 2rem;
+}
+
+/* Typography helpers */
+.font-display {
+  font-family: var(--font-serif);
+}
+
+.eyebrow {
+  font-family: var(--font-sans);
+  font-size: 0.75rem;
+  font-weight: 700;
+  letter-spacing: var(--tracking-eyebrow);
+  text-transform: uppercase;
+  color: var(--color-muted);
+}