diff --git a/style.css b/style.css
index 43a78b3..f6a2814 100644
--- a/style.css
+++ b/style.css
@@ -1,323 +1,214 @@
-/* ==============================
-   共通
-============================== */
+/* ===============================
+   全体デザイン
+================================= */
+
 body {
   margin: 0;
-  font-family: "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
-  user-select: none;
+  padding: 0;
+  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
+  background: linear-gradient(135deg, #f0f4ff, #e8efff);
+  color: #333;
 }
 
-/* ==============================
-   index.html 用
-============================== */
-body.index-page {
-  background: linear-gradient(135deg, #9be2ff, #c7f5d9);
-  min-height: 100vh;
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  padding: 20px;
-}
+/* ===============================
+   index.html のフォームデザイン
+================================= */
 
-.index-container {
-  width: 95%;
-  max-width: 450px;
+.container {
+  max-width: 500px;
+  margin: 40px auto;
+  background: white;
   padding: 25px;
-  background: #ffffff;
-  border-radius: 18px;
-  box-shadow: 0 12px 30px rgba(0,0,0,0.12);
+  border-radius: 14px;
+  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
+  animation: fadeIn 0.7s ease;
+}
+
+h2 {
+  margin-top: 0;
   text-align: center;
-  animation: fadeIn 0.6s ease-out;
+  color: #4a6cd1;
 }
 
-.index-container h1 {
-  margin: 0 0 15px;
-  font-size: 26px;
-  font-weight: 700;
-  color: #333;
+label {
+  display: block;
+  margin: 12px 0 6px;
+  font-weight: bold;
 }
 
-.index-container .desc {
-  margin-bottom: 20px;
-  color: #555;
+input {
+  width: 100%;
+  padding: 10px 14px;
+  font-size: 1rem;
+  border-radius: 8px;
+  border: 1px solid #c8d3f0;
+  outline: none;
+  transition: border 0.2s;
 }
 
-.index-container input[type="text"] {
+input:focus {
+  border: 1px solid #4a6cd1;
+}
+
+button {
   width: 100%;
   padding: 12px;
-  margin: 10px 0;
-  font-size: 17px;
-  border: 2px solid #ddd;
-  border-radius: 10px;
-  box-sizing: border-box;
-}
-
-.index-container input[type="text"]:focus {
-  border-color: #4ba3ff;
-  box-shadow: 0 0 6px rgba(75,163,255,0.4);
-}
-
-.index-container button {
-  width: 100%;
-  padding: 12px;
-  font-size: 18px;
-  border: none;
-  border-radius: 10px;
-  background: #4ba3ff;
+  margin-top: 20px;
+  font-size: 1rem;
+  background: #4a6cd1;
   color: white;
+  border: none;
+  border-radius: 8px;
   cursor: pointer;
   transition: 0.25s;
 }
 
-.index-container button:hover {
-  background: #1b8af5;
+button:hover {
+  background: #3454ad;
 }
 
-/* ==============================
-   map4.html 用
-============================== */
-body.map-page {
-  background: linear-gradient(135deg, #d7efff, #e8ffef);
-  min-height: 100vh;
-  padding: 20px;
-  box-sizing: border-box;
-}
+/* ===============================
+   map4.html レイアウト
+================================= */
 
-/* レイアウト */
-.map-layout {
-  max-width: 1200px;
-  margin: 0 auto;
+#mapContainer {
   display: flex;
-  flex-direction: column;
-  gap: 20px;
-}
-
-/* PC では横並び */
-@media (min-width: 900px) {
-  .map-layout {
-    flex-direction: row;
-    align-items: flex-start;
-  }
-  .map-area {
-    width: 70%;
-  }
-  .member-area {
-    width: 30%;
-  }
-}
-
-/* カード */
-.card {
-  background: #fff;
-  padding: 18px;
-  border-radius: 18px;
-  box-shadow: 0 12px 30px rgba(0,0,0,0.12);
-}
-
-/* 地図部分 */
-.map-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-}
-
-.map-area h1 {
-  margin: 0;
-  font-size: 24px;
-  color: #333;
-}
-
-.group-label {
-  margin-top: 8px;
-  font-size: 15px;
-  color: #555;
-}
-
-#map {
-  width: 100%;
-  height: 480px;
-  border-radius: 15px;
-  margin-top: 15px;
-  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
-}
-
-/* 退出ボタン */
-.exit-btn {
-  padding: 6px 14px;
-  background: #ff6b6b;
-  border: none;
-  color: white;
-  border-radius: 999px;
-  cursor: pointer;
-  font-size: 13px;
-  transition: 0.25s;
-}
-.exit-btn:hover {
-  background: #ff3b3b;
+  height: calc(100vh - 60px);
 }
 
 /* メンバー一覧 */
-.member-area h2 {
+#sidebar {
+  width: 230px;
+  background: white;
+  border-right: 1px solid #ccc;
+  padding: 15px;
+  overflow-y: auto;
+  box-shadow: 2px 0 8px rgba(0,0,0,0.05);
+}
+
+#sidebar h3 {
   margin-top: 0;
-  font-size: 20px;
   text-align: center;
-  color: #444;
+  color: #4a6cd1;
 }
 
 #memberList {
   list-style: none;
-  padding-left: 0;
-  margin: 10px 0 0;
+  padding: 0;
+  margin: 0;
 }
 
 #memberList li {
+  padding: 10px 8px;
+  margin: 8px 0;
+  background: #f7f9ff;
+  border-radius: 8px;
+  cursor: pointer;
   display: flex;
   align-items: center;
-  gap: 12px;
-  background: #f9fbff;
-  padding: 12px;
-  margin-bottom: 12px;
-  border-radius: 12px;
-  font-size: 16px;
-  border-left: 5px solid #4ba3ff;
+  gap: 8px;
+  transition: background 0.2s;
+}
+
+#memberList li:hover {
+  background: #e6edff;
+}
+
+/* オンライン / オフライン */
+.online {
+  border-left: 4px solid #4a9a3d;
+}
+.offline {
+  border-left: 4px solid #a4a4a4;
+}
+
+/* メンバーアイコン（丸） */
+.member-icon {
+  width: 12px;
+  height: 12px;
+  background: #4a6cd1;
+  border-radius: 50%;
+}
+
+/* ===============================
+   地図
+================================= */
+#map {
+  flex: 1;
+}
+
+/* ===============================
+   ピンデザイン（DivIcon）
+================================= */
+
+/* ピン名ラベル */
+.pin-label {
+  background: rgba(0, 0, 0, 0.7);
+  color: white;
+  font-size: 12px;
+  padding: 2px 6px;
+  border-radius: 6px;
+  margin-bottom: 2px;
+  text-align: center;
+  width: max-content;
+}
+
+/* ピン画像 */
+.pin-image {
+  width: 35px;
+}
+
+/* ===============================
+   退出ボタン
+================================= */
+#exitBtn {
+  width: 100%;
+  padding: 10px;
+  background: #d9534f;
+  color: white;
+  border: none;
+  border-radius: 8px;
+  margin-top: 20px;
   cursor: pointer;
   transition: 0.2s;
 }
 
-#memberList li:hover {
-  background: #eef4ff;
-  transform: translateX(4px);
+#exitBtn:hover {
+  background: #b73c38;
 }
 
-/* メンバー丸アイコン */
-.member-icon {
-  width: 28px;
-  height: 28px;
-  border-radius: 50%;
-  background: linear-gradient(135deg, #6db9ff, #4a90e2);
-  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
-  position: relative;
+/* ===============================
+   アニメ削除 → 残骸を無効化
+================================= */
+
+.pulse-marker {
+  animation: none !important;
 }
 
-/* オンライン/オフラインバッジ */
-.member-icon::after {
-  content: "";
-  position: absolute;
-  right: -4px;
-  bottom: -4px;
-  width: 12px;
-  height: 12px;
-  border-radius: 50%;
-  border: 2px solid white;
+/* ===============================
+   スマホ向けレスポンシブ
+================================= */
+@media (max-width: 768px) {
+  #mapContainer {
+    flex-direction: column;
+  }
+
+  #sidebar {
+    width: 100%;
+    height: 180px;
+    border-right: none;
+    border-bottom: 1px solid #ccc;
+  }
+
+  #map {
+    height: calc(100vh - 180px);
+  }
 }
 
-.online .member-icon::after {
-  background: radial-gradient(circle, #7dff9b, #35cc62);
-  box-shadow: 0 0 6px rgba(69,255,125,0.5);
-}
-
-.offline .member-icon::after {
-  background: #ff6b6b;
-}
-
-/* アニメーション共通 */
-.fadeIn {
-  animation: fadeIn 0.6s ease-out;
-}
-.fadeInDelay {
-  animation: fadeIn 0.6s ease-out;
-  animation-delay: 0.25s;
-}
-
+/* ===============================
+   フェードイン演出（フォーム用）
+================================= */
 @keyframes fadeIn {
   from { opacity: 0; transform: translateY(15px); }
-  to { opacity: 1; transform: translateY(0); }
-}
-
-/* ==============================
-   地図ピンの安定パルスアニメーション
-============================== */
-@keyframes pulseMarker {
-  0%   { transform: scale(1); opacity: 1; }
-  30%  { transform: scale(1.15); opacity: 0.92; }
-  60%  { transform: scale(1.05); opacity: 1; }
-  100% { transform: scale(1); opacity: 1; }
-}
-
-.pulse-marker {
-  animation: pulseMarker 0.5s ease-out;
-  transform-origin: bottom center;
-  will-change: transform;
-}
-
-/* ==============================
-   popup 位置補正
-============================== */
-.leaflet-popup {
-  margin-left: 0px !important;
-}
-
-/* Google Maps風ラベル */
-.custom-pin {
-  position: relative;
-  text-align: center;
-}
-
-.pin-label {
-  background: white;
-  padding: 2px 6px;
-  border-radius: 6px;
-  font-size: 13px;
-  color: #333;
-  white-space: nowrap;
-  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
-  transform: translateY(-6px);
-}
-
-.pin-image {
-  width: 30px;
-  height: 45px;
-  display: block;
-  margin: 0 auto;
-}
-
-/* ピンアニメ（パルス） */
-.pulse-marker {
-  animation: pulseMarker 0.5s ease-out;
-  transform-origin: bottom center;
-}
-
-@keyframes pulseMarker {
-  0%   { transform: scale(1); opacity: 1; }
-  30%  { transform: scale(1.15); opacity: 0.92; }
-  60%  { transform: scale(1.05); opacity: 1; }
-  100% { transform: scale(1); opacity: 1; }
-}
-
-/* Google Maps風ラベル（はみ出し防止版） */
-.pin-label {
-  background: white;
-  padding: 2px 6px;
-  border-radius: 6px;
-  font-size: 13px;
-  color: #333;
-  white-space: nowrap;
-  max-width: 120px;         /* ★ 最大幅を決める */
-  overflow: hidden;         /* ★ はみ出し防止 */
-  text-overflow: ellipsis;  /* ★ … で省略 */
-  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
-  transform: translateY(-6px);
-  display: inline-block;
-  text-align: center;
-}
-
-/* ピン内部の要素にクリックイベントを通す */
-.custom-pin, 
-.custom-pin * {
-  pointer-events: auto !important;
-}
-
-/* Leaflet のデフォルトを上書きして DivIcon をクリック可能に */
-.leaflet-interactive {
-  pointer-events: auto !important;
+  to   { opacity: 1; transform: translateY(0); }
 }