body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #333333;
    background-color: #f7f7f7;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 2px solid #ddd;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    color: #333333;
    margin: 0;
}

h2 {
    font-size: 1.5em;
    color: #333333;
    border-left: 5px solid #333333;
    padding-left: 10px;
    margin-top: 40px;
    margin-bottom: 15px;
}

p, ul {
    font-size: 1em;
    margin-bottom: 1em;
}

ul {
    list-style: none;
    padding-left: 0;
}

li {
    margin-bottom: 0.5em;
    padding-left: 1.5em;
    position: relative;
}

li::before {
    content: "•";
    color: #333333;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

section {
    margin-bottom: 40px;
}

a {
    color: inherit; /* 親要素（ここではpタグ）の色を継承 */
    text-decoration: none; /* デフォルトの下線を消す */
}

a:hover {
    text-decoration: underline; /* マウスオーバー時に下線を出す */
}

footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    margin-top: 40px;
    color: #555555;
    font-size: 0.9em;
}