diff --git a/style.css b/style.css
index 123e626..5e3e68f 100644
--- a/style.css
+++ b/style.css
@@ -88,4 +88,23 @@ a h5 {
 #doi-link {
     color: #333;
     text-decoration: dashed;
+}
+
+.alignright {
+    float: right;
+    margin-left: 20px;
+    margin-bottom: 20px;
+}
+
+.alignleft {
+    float: left;
+    margin-right: 20px;
+    margin-bottom: 20px;
+}
+
+.aligncenter {
+    display: block;
+    margin-left: auto;
+    margin-right: auto;
+    margin-bottom: 20px;
 }
\ No newline at end of file