diff --git a/qml/pages/ReaderPage.qml b/qml/pages/ReaderPage.qml
index 8a2d549..7d43bb6 100644
--- a/qml/pages/ReaderPage.qml
+++ b/qml/pages/ReaderPage.qml
@@ -235,15 +235,21 @@ Page {
     }
 
     // reflow: imposta il font-size del documento (il testo si ri-avvolge)
-    // e ripristina la posizione in frazione sull'altezza ricalcolata
+    // e ripristina la posizione in frazione sull'altezza ricalcolata.
+    // Serve uno <style> con !important: molti EPUB impostano px su body/p
+    // che vincerebbero sul semplice font-size dell'html
     function applyFontScale() {
         if (!web.loaded)
             return
         var px = Math.round(16 * page.fontScale * 100) / 100
-        var script = "document.documentElement.style.setProperty('font-size', '"
-                + px + "px', 'important');"
-                + "window.scrollTo(0, " + page.chapterFraction
-                + " * Math.max(1, document.documentElement.scrollHeight - window.innerHeight)); true"
+        var script = "(function(){"
+                + "var s=document.getElementById('cw-font');"
+                + "if(!s){s=document.createElement('style');s.id='cw-font';document.head.appendChild(s);}"
+                + "s.textContent='html,body{font-size:" + px + "px!important}"
+                + "p,div,li,td,blockquote,section{font-size:1em!important}';"
+                + "window.scrollTo(0," + page.chapterFraction
+                + "*Math.max(1,document.documentElement.scrollHeight-window.innerHeight));"
+                + "true})()"
         web.runJavaScript(script, function() { })
     }
 
diff --git a/src/settings.cpp b/src/settings.cpp
index 6095531..8cb5d8f 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -19,6 +19,7 @@ void Settings::setServerUrl(const QString &value)
     if (value == serverUrl())
         return;
     m_settings.setValue(QStringLiteral("serverUrl"), value);
+    m_settings.sync(); // scrivi subito su disco: l'app può crashare alla chiusura (WebView)
     emit serverUrlChanged();
     emit baseUrlChanged();
 }
@@ -33,6 +34,7 @@ void Settings::setUsername(const QString &value)
     if (value == username())
         return;
     m_settings.setValue(QStringLiteral("username"), value);
+    m_settings.sync();
     emit usernameChanged();
 }
 
@@ -46,6 +48,7 @@ void Settings::setPassword(const QString &value)
     if (value == password())
         return;
     m_settings.setValue(QStringLiteral("password"), value);
+    m_settings.sync();
     emit passwordChanged();
 }
 
@@ -59,6 +62,7 @@ void Settings::setIgnoreSslErrors(bool value)
     if (value == ignoreSslErrors())
         return;
     m_settings.setValue(QStringLiteral("ignoreSslErrors"), value);
+    m_settings.sync();
     emit ignoreSslErrorsChanged();
 }
 
@@ -97,6 +101,7 @@ QString Settings::bookmarkKey(int bookId, const QString &format) const
 void Settings::setBookmarkKey(int bookId, const QString &format, const QString &key)
 {
     m_settings.setValue(QStringLiteral("bookmarks/%1/%2").arg(bookId).arg(format), key);
+    m_settings.sync();
 }
 
 QString Settings::bookFilePath(int bookId, const QString &format) const