Was fanning out to 3 rows because the 152px max-width (3 icons +
2 gaps exact) had no slack — subpixel rounding could push the
third icon over and trigger another wrap. Bumped to 158px in the
in-grid mode (600px breakpoint) and 180px in the absolute-overlay
mode (380px breakpoint, where the 22px padding-left from the
gradient fade was also eating into the 3-icon row width).
b5449ea3f9