diff --git a/website/doc/theme/book.js b/website/doc/theme/book.js
index 16f31323..c4ab6988 100644
--- a/website/doc/theme/book.js
+++ b/website/doc/theme/book.js
@@ -544,11 +544,10 @@ function playground_text(playground) {
         }
     }, { passive: true });
 
-    // Scroll sidebar to current active section
-    var activeSection = document.getElementById("sidebar").querySelector(".active");
-    if (activeSection) {
-        // https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView
-        // activeSection.scrollIntoView({ block: 'center' });
+    // Try to show the full sidebar
+    if (html.classList.contains("sidebar-visible")) {
+        var realHeight = sidebar.querySelector(".sidebar-scrollbox").scrollHeight;
+        document.getElementById("page-wrapper").style.minHeight  = realHeight + 80 + "px";
     }
 })();
 
diff --git a/website/doc/theme/css/chrome.css b/website/doc/theme/css/chrome.css
index 69fbe34d..7f9dc35d 100644
--- a/website/doc/theme/css/chrome.css
+++ b/website/doc/theme/css/chrome.css
@@ -111,6 +111,16 @@
 .js #mdbook .menu-title {
 	cursor: pointer;
 }
+@media only screen and (max-width: 640px) {
+	#mdbook .menu-title {
+		font-size: 1.5rem;
+	}
+}
+@media only screen and (max-width: 420px) {
+	#mdbook .menu-title {
+		font-size: 1.2rem;
+	}
+}
 
 #mdbook .menu-bar,
 #mdbook .menu-bar:visited,