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

Jacky Zhao

2024-01-21 015b4f6a15da3b81f9e3ad004aa24636ab3882ed

 quartz/styles/variables.scss

@@ -1,5 +1,6 @@
$pageWidth: 800px;
$pageWidth: 750px;
$mobileBreakpoint: 600px;
$tabletBreakpoint: 1200px;
$sidePanelWidth: 400px;
$sidePanelWidth: 380px;
$topSpacing: 6rem;
$fullPageWidth: $pageWidth + 2 * $sidePanelWidth;