body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0px;
    padding: 0px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

.container2 {
    max-width: 960px;
    margin: 0 auto;
    padding: 0px;
}

header {
    background-color: #007bff;
    color: #fff;
    text-align: center;
    padding: 40px 0;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
}

header h2 {
    margin: 0;
    font-size: 2.5em;
}

header h3 {
    margin: 0;
    font-size: 2.0em;
}

header p {
    margin-top: 10px;
    font-size: 2.0em;
}

main section {
    background-color: #fff;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

main section h2 {
    color: #007bff;
    font-size: 2em;
    margin-bottom: 20px;
    border-bottom: 2px solid #007bff;
    padding-bottom: 10px;
}

main section p {
    line-height: 1.6;
    margin-bottom: 10px;
    padding-left: 20px;
    padding-right: 20px;
}

main section ul {
    line-height: 1.6;
    margin-bottom: 10px;
    padding-left: 20px;
    padding-right: 20px;
}

.member {
    margin-bottom: 20px;
}

.member h3 {
    color: #007bff;
    font-size: 1.5em;
    margin-bottom: 10px;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header {
        padding: 30px 0;
    }

    header h1 {
        font-size: 2.0em;
    }

    main section {
        padding: 20px;
    }

    main section h2 {
        font-size: 1.8em;
    }
}

/* ... (既存のCSSは変更なし) ... */

/* ナビゲーションメニュー */
nav {
    background-color: #f0f0f0;
    padding: 10px 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav li {
    margin: 0 15px;
}

nav a {
    text-decoration: none;
    color: #333;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

nav a:hover {
    background-color: #ddd;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav li {
        margin: 5px 0;
        margin: 25px 0;
    }
}

/* ... (既存のCSSは変更なし) ... */

/* 上に戻るボタン */
.back-to-top {
    text-align: right; /* 右寄せに変更 */
    margin-top: 20px;
}

.back-to-top a {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 10px 15px;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.back-to-top a:hover {
    background-color: #0056b3;
}

/* ... (その他のCSSは変更なし) ... */

/* ... (existing CSS above) ... */

main {
    padding: 0px 20px; /* Adjust these values as needed */
}

main section {
    background-color: #fff;
    margin-bottom: 20px;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ... (existing CSS below) ... */