diff --git a/ch02/listing-2.26.html b/ch02/listing-2.26.html
index d43caf3..2d0b679 100644
--- a/ch02/listing-2.26.html
+++ b/ch02/listing-2.26.html
@@ -8,7 +8,7 @@
 
     p {
       font-family: var(--main-font, sans-serif);
-      color: var(--brand-color, blue);
+      color: var(--secondary-color, blue);
     }
   </style>
 </head>
diff --git a/ch04/listing-4.2.html b/ch04/listing-4.2.html
index 0392569..fb5e068 100644
--- a/ch04/listing-4.2.html
+++ b/ch04/listing-4.2.html
@@ -43,7 +43,7 @@
       <h1>Franklin Running Club</h1>
     </header>
 
-    <main class="main clearfix">
+    <main class="main">
       <h2>Running tips</h2>
 
       <div>
diff --git a/ch04/listing-4.3.html b/ch04/listing-4.3.html
index 422f60d..4c1a78d 100644
--- a/ch04/listing-4.3.html
+++ b/ch04/listing-4.3.html
@@ -47,7 +47,7 @@
       <h1>Franklin Running Club</h1>
     </header>
 
-    <main class="main clearfix">
+    <main class="main">
       <h2>Running tips</h2>
 
       <div>
diff --git a/ch04/listing-4.4.html b/ch04/listing-4.4.html
index 9a38b38..3cc41b3 100644
--- a/ch04/listing-4.4.html
+++ b/ch04/listing-4.4.html
@@ -55,7 +55,7 @@
       <h1>Franklin Running Club</h1>
     </header>
 
-    <main class="main clearfix">
+    <main class="main">
       <h2>Running tips</h2>
 
       <div>
diff --git a/ch04/listing-4.5.html b/ch04/listing-4.5.html
index 80a5b97..3dee4d1 100644
--- a/ch04/listing-4.5.html
+++ b/ch04/listing-4.5.html
@@ -55,7 +55,7 @@
       <h1>Franklin Running Club</h1>
     </header>
 
-    <main class="main clearfix">
+    <main class="main">
       <h2>Running tips</h2>
 
       <div>