- Sparkline (`savings-sparkline` controller): dropped the `Math.max(0,
yMin)` clamp on the y-axis domain so negative balances (or any series
that dips into negative territory) render fully instead of being
cropped off the canvas.
- Hero card: padding `p-6` → `p-7`, column ratio
`[minmax(0,1fr)_minmax(0,1.6fr)]` so the chart breathes, min height
bumped to 220px, sparkline container `h-full min-h-[200px]` so it
fills the card vertically. Stats row now sits at the bottom of the
text column via `mt-auto pt-6`; labels promoted to `text-xs`, values
to `text-lg`.
- Section vertical rhythm: outer `space-y-6` → `space-y-8`.
- Goal card: padding `p-[18px]` → `p-6`. Internal gap from header row
to amount line `mt-3.5` → `mt-5`. Account-row gap `mt-3` → `mt-4`.
- Account card: padding `p-5` → `p-6`.
- Status pill "Behind" dot: `bg-yellow-500` → `bg-yellow-600` for a
warmer/ambery tone matching the Claude Design reference.
- Goal card donut "behind" stroke: `var(--color-yellow-500)` →
`var(--color-yellow-600)` to match the pill.