fix: remove quartz 3 references, update font style in popovers

Jacky Zhao

2024-01-21 015b4f6a15da3b81f9e3ad004aa24636ab3882ed

 quartz/components/Header.tsx

@@ -9,7 +9,7 @@
  display: flex;
  flex-direction: row;
  align-items: center;
  margin: 2em 0;
  margin: 2rem 0;
  gap: 1.5rem;
}