<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<title>グループ選択</title>
<style>
body {
font-family: "Inter", sans-serif;
background: #f5f7fa;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
}
.card {
background: white;
padding: 20px 30px;
border-radius: 16px;
box-shadow: 0 6px 16px rgba(0,0,0,0.1);
text-align: center;
}
input {
padding: 8px;
font-size: 16px;
border-radius: 8px;
border: 1px solid #ccc;
margin-right: 10px;
}
button {
padding: 8px 16px;
border-radius: 8px;
border: none;
background-color: #4a90e2;
color: white;
font-weight: 600;
cursor: pointer;
}
button:hover {
background-color: #357ab8;
}
</style>
</head>
<body>
<div class="card">
<h2>グループ名を入力してください</h2>
<form action="map4.html" method="get">
<input type="text" name="group" required>
<button type="submit">地図へ</button>
</form>
</div>
</body>
</html>
