fix: Reader view on mobile screen (#4868)

p/themes/base-theme/frss.css

@@ -2129,6 +2129,10 @@ input:checked + .slide-container .properties {
 		top: 0;
 	}
 
+	.reader .flux .content {
+		padding: 1rem;
+	}
+
 	.notification {
 		top: 0;
 		left: 0;

p/themes/base-theme/frss.rtl.css

@@ -2129,6 +2129,10 @@ input:checked + .slide-container .properties {
 		top: 0;
 	}
 
+	.reader .flux .content {
+		padding: 1rem;
+	}
+
 	.notification {
 		top: 0;
 		right: 0;