center featured images and remove unused classes

assets/sass/cards.scss

@@ -52,12 +52,6 @@ article.card {
 	border-radius: 50%;
 }
 
-img.small-image {
-	flex: 1 1 400px;
-	overflow: hidden;
-	max-width: 400px;
-}
-
 .article-link {
 	text-decoration: none;
 	color: $font-color;

assets/sass/main.scss

@@ -78,11 +78,6 @@ main {
 	flex-basis: 100%;
 }
 
-.break {
-	flex-basis: 100%;
-	height: 0px;
-}
-
 a, p, li, h2 {
 	font-size: 1.25rem;
 }
@@ -94,7 +89,8 @@ img {
 img.featured {
     border-radius: 8px;
     max-height: 500px;
-    margin-top: 12px;
+    margin: 12px auto;
+    display: block;
 }
 
 .small-text {