diff --git a/assets/css/app.css b/assets/css/app.css
index acaa4508..c22e3dad 100644
--- a/assets/css/app.css
+++ b/assets/css/app.css
@@ -327,31 +327,56 @@ select.select {
   text-decoration: underline;
 }
 
-/* API docs page — narrower reading column, since the site font is
-   monospace and monospace prose is uncomfortable past ~80ch. */
+/* API docs page — readable prose. Override the project's monospace
+   default with a system sans stack for the body, keep mono for code
+   spans and pre blocks. Without this the bulleted prose wraps to
+   2-3 lines per item and is a chore to scan. */
 .markdown-content.api-docs {
-  max-width: 60rem;
-  font-size: 0.95rem;
+  max-width: 64rem;
+  font-family:
+    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
+    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
+  font-size: 1rem;
+  line-height: 1.7;
+}
+
+.markdown-content.api-docs code,
+.markdown-content.api-docs pre,
+.markdown-content.api-docs pre code {
+  font-family: "Cascadia Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
 }
 
 .markdown-content.api-docs code {
   word-break: break-word;
+  font-size: 0.875em;
 }
 
 .markdown-content.api-docs h1 {
-  font-size: 1.75rem;
+  font-size: 2rem;
+  letter-spacing: -0.01em;
 }
 
 .markdown-content.api-docs h2 {
-  font-size: 1.3rem;
+  font-size: 1.5rem;
+  letter-spacing: -0.01em;
+  margin-top: 2.25rem;
 }
 
 .markdown-content.api-docs h3 {
-  font-size: 1.1rem;
+  font-size: 1.2rem;
+  margin-top: 1.75rem;
+}
+
+.markdown-content.api-docs h4 {
+  font-size: 1rem;
+}
+
+.markdown-content.api-docs li {
+  margin: 0.4rem 0;
 }
 
 .markdown-content.api-docs table {
-  font-size: 0.85em;
+  font-size: 0.95em;
 }
 
 .markdown-content.api-docs th,