CSS adjustments to headers

_sass/modules/_base.scss

@@ -82,22 +82,22 @@ a {
 }
 
 h1 {
-  font-size: 2.5em;
-}
-
-h2 {
   font-size: 2em;
 }
 
-h3 {
+h2 {
   font-size: 1.5em;
 }
 
-h4 {
-  font-size: 1.5em;
+h3 {
+  font-size: 1em;
   text-decoration: underline;
 }
 
+h4 {
+  font-size: 1em;
+}
+
 blockquote {
   color: lighten($color-slate, 30%);
   border-left: 2px solid lighten($color-slate, 50%);

_sass/modules/_content-area.scss

@@ -7,8 +7,14 @@
 }
 
 .content__list {
+
+  h1 {
+    font-weight: bold;
+  }
+
   h2 {
     font-weight: bold;
+    text-decoration: underline;
 
     &:not(:first-child) {
       margin-top: $spacing-unit * 2;