The new components shipped this PR (source icon row, fallback banner,
glow aura, library-empty search CTA) had no responsive styling. On
phones the rows ran fine via horizontal scroll but the chips wasted a
lot of space per icon, the CTA could overflow on narrow screens, and
the aura kept its desktop-sized ellipse for no benefit.
At ≤768px (tablet/phone):
- Enhanced source row: tighter padding, 24x24 glyphs, 72px chip
min-width.
- Global widget source row: even tighter, 20x20 glyphs, 62px chips.
- Fallback banners scale down to match.
- Aura shrinks to a 440x160 / 540x200 ellipse and a 180px-tall strip
so it doesn't eat short mobile viewports.
- Library empty CTA allows text wrap + reduced padding so the
"Search online for "long artist name"" string doesn't break the
layout on narrow screens.
At ≤480px (phone):
- Enhanced chips drop to 44px min-width.
- Global widget chips drop to 40px.
- Both hide the source-name label, showing icon + tooltip only — the
full 8-source row now fits or scrolls minimally at that scale.
- Aura narrows further to 140px tall.
- Library CTA nudges down to 12px font.
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