diff --git a/public/css/app.css b/public/css/app.css
index 6179495..84f493b 100644
--- a/public/css/app.css
+++ b/public/css/app.css
@@ -15,6 +15,10 @@ body {
     max-width: 600px;
     margin: 0 auto;
     padding: 2rem;
+    min-height: 100vh;
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
 }
 
 .page-center {
@@ -50,6 +54,11 @@ p {
     margin-bottom: 1.5rem;
 }
 
+#shorten-form {
+    max-width: 420px;
+    margin: 0 auto;
+}
+
 label {
     display: block;
     margin-bottom: 0.5rem;