TF-4093 Make interface more compact

core/lib/utils/html/html_template.dart

@@ -103,12 +103,11 @@ class HtmlTemplate {
     }
   ''';
 
-  static const String defaultFontStyle = '''
-    div, p, span, th, td, tr, ul, ol, li, a, button {
+  static String defaultFontStyle({double fontSize = 14}) => '''
+    body {
       font-weight: 400;
-      font-size: 16px;
-      line-height: 24px;
-      letter-spacing: -0.01em; /* -1% */
+      font-size: ${fontSize}px;
+      font-style: normal;
     }
     
     p {

core/lib/utils/html/html_utils.dart

@@ -123,6 +123,7 @@ class HtmlUtils {
     String? javaScripts,
     bool hideScrollBar = true,
     bool useDefaultFontStyle = false,
+    double fontSize = 14,
     TextDirection? direction,
     double? contentPadding,
   }) {
@@ -135,7 +136,7 @@ class HtmlUtils {
       <style>
         ${HtmlTemplate.fontFaceStyle}
         
-        ${useDefaultFontStyle ? HtmlTemplate.defaultFontStyle : ''}
+        ${useDefaultFontStyle ? HtmlTemplate.defaultFontStyle(fontSize: fontSize) : ''}
         
         .tmail-content {
           min-height: ${minHeight ?? 0}px;