diff --git a/styles.css b/styles.css
index 87adc0d..92a66ad 100644
--- a/styles.css
+++ b/styles.css
@@ -33,6 +33,14 @@ body {
   white-space: nowrap;
 }
 
-.signup button:focus {
-  outline: none;
+.signup button:focus-visible {
+  outline: 3px solid var(--brand);
+  outline-offset: 2px;
+}
+
+@media (max-width: 480px) {
+  .signup button {
+    width: 100%;
+    padding-inline: 0;
+  }
 }