diff --git a/css/compat/index.css b/css/compat/index.css
index 03b1b47..03791c0 100644
--- a/css/compat/index.css
+++ b/css/compat/index.css
@@ -268,7 +268,8 @@ fieldset legend {
 	border-style: var(--fieldset-legend-border-style);
 	border-width: var(--fieldset-legend-border-width);
 	box-shadow: var(--fieldset-legend-box-shadow);
-	font-weight: bold;
+	font-size: var(--fieldset-legend-font-size);
+	font-weight: var(--fieldset-legend-font-weight);
 	color: var(--fieldset-legend-color);
 }
 /* Details tag */
diff --git a/css/compat/variables.css b/css/compat/variables.css
index 585c8da..89c2d6d 100644
--- a/css/compat/variables.css
+++ b/css/compat/variables.css
@@ -172,6 +172,8 @@
 	--fieldset-legend-border-width:                   0;
 	--fieldset-legend-box-shadow:                     none;
 	--fieldset-legend-color:                          hsl(0, 0%, 33%);
+	--fieldset-legend-font-size:                      inherit;
+	--fieldset-legend-font-weight:                    700;
 
 	/** Details **/
 	--details-bg:                                     transparent;