Centre one 42rem reading column on content, post, event and FAQ pages

Elternbeirat.Web/Features/Faqs/FaqList.razor.css

@@ -0,0 +1,17 @@
+/* Same centred 42rem reading column as a content page (ContentPage.razor.css), so
+   every page of the site shares one column under the header. The topic cards and
+   the questions inside them live in the global app.css. */
+h1,
+article,
+p,
+.faq-topic {
+    box-sizing: border-box;   /* padding inside the 42rem, flush with the text */
+    max-width: 42rem;
+    margin-inline: auto;
+}
+
+/* The intro's last paragraph drops its margin (app.css), so the first card would
+   sit right under the text; this gives it the same air as between sections. */
+article {
+    margin-bottom: var(--space-5);
+}