The Sivali logo mark as a live object: the yin-yang S cut from a circle, with the dotted orbit rings turning inside the open half, exactly as the Sivali Corp hero draws it.

Load `kits/motion/sivali-mark.js` (no dependencies). It exposes `window.SivaliMark`:

- `SivaliMark.svg({ ink, size, bg })` returns the static mark as an SVG string. Use `#39399B` on white or `neutral-50`, `#FFFFFF` on indigo or `#121212`. Exported files: `assets/Logos/`.
- `SivaliMark.draw(ctx, { t, cx, cy, size, ink, glow, build, spin, mouse })` draws one animated frame on a canvas. `build` 0 to 1 flies the dots in and fills the mark (used by the bumper); `mouse` pushes nearby dots away.
- `SivaliMark.mount(canvas, fn, { hold })` runs a frame function at device pixel ratio and renders a single still frame when the viewer prefers reduced motion.
- `SivaliMark.lockup({ ink, word })` returns the HTML lockup (mark + tracked wordmark) used in the site header and footer.

Rules
- The wordmark is Ubuntu Medium, uppercase, tracked `0.18em`, set at about 0.24 of the mark height and spaced 0.18 of the mark height from it.
- Keep the mark round; never recolour the dots separately from the mark, never add gradients inside it.
- Minimum size 24px on screen. Clear space around the mark equals half its diameter.
- On dark grounds the mark may glow (`primary-100` halo); on light grounds it never glows.