Phones were downloading the full 1.5 MB / 2 MB hero JPEG. Now the
image macro emits a `srcset` ladder (480/768/1200/1600/2560/3840/5345 w)
with `sizes="100vw"`, so a 480 px-wide phone picks the ~19 KB variant
and 5K screens still get the native resolution.
Also drop `loading="lazy"` on the first slide — it is the LCP element
and should load eager.
Macro changes:
- Add `srcset_widths` (CSV string, since Tera macros only allow scalar
defaults) and `sizes` parameters.
- Add `lazy=true` parameter; callers can pass `lazy=false` for
above-the-fold images.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Brummel
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