diff --git a/js/heartAnimation.js b/js/heartAnimation.js
index 2eb9e47..9f50966 100644
--- a/js/heartAnimation.js
+++ b/js/heartAnimation.js
@@ -1,27 +1,31 @@
 const heartElement = document.getElementById('heart');
-const body = document.body;
+const gridElement = document.getElementById('likelion_grid');
 
 function createHeart() {
-  const heart = document.createElement('div');
+  const heart = document.createElement('div'); //비어있는 div에 이미지 형태의 하트 생성
   heart.innerHTML = `
     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
       <path fill="#fb0000" d="M21.19 12.683c-2.5 5.41-8.62 8.2-8.88 8.32a.85.85 0 0 1-.62 0c-.25-.12-6.38-2.91-8.88-8.32c-1.55-3.37-.69-7 1-8.56a4.93 4.93 0 0 1 4.36-1.05a6.16 6.16 0 0 1 3.78 2.62a6.15 6.15 0 0 1 3.79-2.62a4.93 4.93 0 0 1 4.36 1.05c1.78 1.56 2.65 5.19 1.09 8.56" />
     </svg>
   `;
-  heart.classList.add('heart');
-  heart.style.left = Math.random() * 100 + 'vw';
-  heart.style.animationDuration = Math.random() * 2 + 3 + 's';
 
-  body.appendChild(heart);
+  heart.classList.add('heart'); //하트 여러개 생성
+
+  const gridOffsetTop = gridElement.offsetTop; //그리드 시작부근에서 떨어지기 
+  heart.style.top = `${gridOffsetTop}px`;
+  heart.style.left = Math.random() * 100 + 'vw'; // 랜덤 위치
+  heart.style.animationDuration = Math.random() * 2 + 3 + 's'; //속도=랜덤
+
+  document.body.appendChild(heart);
 
   setTimeout(() => {
-    heart.remove();
+    heart.remove(); //시간이 지나면 하트 제거
   }, 3000);
 }
 
 // 하트 영역 클릭 이벤트
 heartElement.addEventListener('click', () => {
   for (let i = 0; i < 10; i++) {
-    setTimeout(createHeart, i * 200);
+    setTimeout(createHeart, i * 200); //200 간격으로 새로운 하트 생성
   }
 });
diff --git a/styles/header.css/hd.css b/styles/header.css/hd.css
index 0cb14c7..ed1aad1 100644
--- a/styles/header.css/hd.css
+++ b/styles/header.css/hd.css
@@ -99,7 +99,7 @@ color: #F9C756;
   text-decoration: none;
 }
 
-@media screen and (max-width: 749px) {
+@media screen and (max-width: 449px) {
   #header_navigation {
     display: none;
   }
@@ -108,7 +108,7 @@ color: #F9C756;
   }
 }
 
-@media screen and (min-width: 750px) {
+@media screen and (min-width: 450px) {
   #header_navigation {
     display: inline-block;
   }
@@ -123,19 +123,20 @@ color: #F9C756;
   cursor: pointer;
 }
 .heart {
-  position: absolute;
   z-index: 1500;
+  position: absolute;
   width: 30px;
   height: 30px;
-  animation: float 3s linear infinite;
+  animation: fall 3s linear infinite;
 }
-@keyframes float {
+@keyframes fall {
   0% {
-    transform: translateY(100vh) scale(0.5);
+    transform: translateY(0) scale(0.5);
     opacity: 1;
   }
   100% {
-    transform: translateY(-10vh) scale(1.5);
+    transform: translateY(100vh) scale(1.5);
     opacity: 0;
   }
-}
\ No newline at end of file
+}
+