diff --git a/style.css b/style.css
index 67705c2..7e19882 100644
--- a/style.css
+++ b/style.css
@@ -1,70 +1,108 @@
-/* 全体の背景 */
+/* 全体 */
 body {
   margin: 0;
-  font-family: "Hiragino Sans", "Helvetica Neue", sans-serif;
-  background: linear-gradient(135deg, #aee1ff, #d6ffe3);
+  font-family: "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
+  background: #eef6ff;
   min-height: 100vh;
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  padding: 20px;
 }
 
-/* カード */
+/* index.html のログインカード */
 .container {
-  width: 100%;
+  width: 95%;
   max-width: 450px;
+  margin: 40px auto;
   padding: 25px;
-  background: #fff;
+  background: white;
   border-radius: 18px;
-  box-shadow: 0 10px 28px rgba(0,0,0,0.12);
+  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
   text-align: center;
 }
 
-/* タイトル */
-.container h1 {
-  font-size: 26px;
-  margin-bottom: 10px;
-}
-
 /* 入力欄 */
 input[type="text"] {
   width: 100%;
   padding: 12px;
-  margin: 8px 0;
+  margin: 10px 0;
   font-size: 16px;
-  border: 2px solid #ddd;
   border-radius: 10px;
-  box-sizing: border-box;
-}
-
-input[type="text"]:focus {
-  border-color: #4ba3ff;
-  box-shadow: 0 0 6px rgba(75,163,255,0.4);
+  border: 2px solid #ddd;
 }
 
 /* ボタン */
 button {
   width: 100%;
   padding: 12px;
-  font-size: 17px;
+  font-size: 18px;
   border-radius: 10px;
   background: #4ba3ff;
-  color: #fff;
+  color: white;
   border: none;
   cursor: pointer;
 }
 
-button:hover {
-  background: #1b8af5;
+/* -------------------------------
+   map4.html レイアウト
+--------------------------------*/
+.map-layout {
+  display: flex;
+  flex-direction: column; /* スマホは縦並び */
+  gap: 20px;
+  padding: 20px;
+  max-width: 1200px;
+  margin: 0 auto;
+}
+
+/* PCのときは横並びにする */
+@media (min-width: 900px) {
+  .map-layout {
+    flex-direction: row;
+    align-items: flex-start;
+  }
+
+  .map-area {
+    width: 70%;
+  }
+
+  .member-area {
+    width: 30%;
+    max-height: 90vh;
+    overflow-y: auto;
+    background: white;
+    padding: 20px;
+    border-radius: 12px;
+    box-shadow: 0 0 12px rgba(0,0,0,0.1);
+  }
+}
+
+/* スマホのときは標準の縦並び */
+.map-area {
+  width: 100%;
+}
+
+.member-area {
+  width: 100%;
+  background: white;
+  padding: 15px;
+  border-radius: 12px;
+  box-shadow: 0 0 12px rgba(0,0,0,0.1);
 }
 
 /* 地図 */
 #map {
   width: 100%;
-  height: 480px;
-  margin-top: 15px;
+  height: 450px;
   border-radius: 15px;
-  overflow: hidden;
-  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
+  margin-top: 10px;
+}
+
+/* メンバーリスト */
+#memberList {
+  padding-left: 18px;
+  font-size: 18px;
+}
+
+#memberList li {
+  margin-bottom: 8px;
+  border-bottom: 1px solid #ddd;
+  padding-bottom: 4px;
 }