fix: embed pdf aspect ratio (closes #1310)

Jacky Zhao

2024-08-06 3938904cd096205b27741538655c3fb18cd401be

 quartz/components/styles/explorer.scss

@@ -11,7 +11,7 @@
  display: flex;
  align-items: center;

  & h1 {
  & h2 {
    font-size: 1rem;
    display: inline-block;
    margin: 0;