All three lines render in the DOM; CSS drives the fade via data-active.
Reduced-motion users see the first line only (no interval, no fade).
Rotation pauses on hover and keyboard focus. aria-live=off on the
rotator so AT does not announce every swap; aria-hidden flips per-swap
to avoid duplicate heading announcements.
Also set vite.build.assetsInlineLimit=0 in astro.config.mjs so Astro
emits the rotator script as a same-origin external file (dist/assets/)
rather than inlining it — required for CSP script-src 'self' compliance.
