Wolfram Alpha answer box doesn't have enough contrast on Dark theme

Light theme

Dark theme

The contrast on the WA answer box is nearly unnoticable on dark theme, as rgba(0, 0, 0, .1) is too subtle on dark theme.

I expect the WA answer box to be easily distinguishable even on dark theme.

Workaround
The current workaround is to calculate the shadow colour from the foreground colour instead:

.widget_holder .wasb {
  box-shadow: 0 15px 45px 0 color-mix(in srgb, var(--primary) 10%, transparent);
}