diff --git a/style.css b/style.css
index b454d52..569446c 100644
--- a/style.css
+++ b/style.css
@@ -545,15 +545,30 @@
     padding: 8px 10px;
   }
 }
-.invite-btn {
-  padding: 10px 15px;
-  background: #4287f5;
-  color: white;
+.invite-cute-btn {
+  display: inline-block;
+  padding: 12px 20px;
+  font-size: 16px;
+  font-weight: bold;
+  border-radius: 25px;
   border: none;
-  border-radius: 8px;
-  font-size: 15px;
-  margin: 10px 0;
+  color: white;
+  background: linear-gradient(135deg, #6ea8ff, #3d7eff);
+  box-shadow: 0 4px 10px rgba(0, 100, 255, 0.3);
+  cursor: pointer;
+  transition: 0.25s ease;
+  letter-spacing: 0.5px;
 }
-.invite-btn:hover {
-  opacity: 0.8;
+
+/* ホバー時にふわっと明るく */
+.invite-cute-btn:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 8px 14px rgba(0, 100, 255, 0.35);
+  filter: brightness(1.1);
+}
+
+/* 押した瞬間に“ぽよん” */
+.invite-cute-btn:active {
+  transform: scale(0.96);
+  box-shadow: 0 3px 8px rgba(0, 80, 200, 0.25);
 }