body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 30px;
}

.date-info {
    text-align: center;
    margin-bottom: 30px;
    color: #666;
}

.preface {
    background-color: #f8f9fa;
    padding: 20px;
    margin-bottom: 30px;
    border-radius: 4px;
}

h2 {
    font-size: 18px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #1a1a1a;
}

p {
    margin-bottom: 15px;
}

.important {
    font-weight: bold;
}

ol {
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

.sub-list {
    list-style-type: none;
    padding-left: 20px;
}

.numbered-list {
    list-style-type: decimal;
}

.sub-numbered-list {
    list-style-type: decimal;
    padding-left: 40px;
}

.alpha-list {
    list-style-type: lower-alpha;
    padding-left: 40px;
}

.roman-list {
    list-style-type: lower-roman;
    padding-left: 40px;
}