body {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}
h1 {
    font-size: 24px;
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}
h2 {
    font-size: 18px;
    font-weight: bold;
    margin-top: 25px;
    margin-bottom: 10px;
}
h3 {
    font-size: 16px;
    font-weight: bold;
    margin-top: 20px;
    margin-bottom: 10px;
    font-style: italic;
    color: #666;
}
ul {
    margin-left: 25px;
    margin-bottom: 20px;
}
li {
    margin-bottom: 8px;
}
.header {
    text-align: right;
    margin-bottom: 30px;
    color: #666;
}
.header p {
    margin: 2px 0;
}
.title {
    text-align: center;
    font-weight: bold;
    font-size: 20px;
    margin: 20px 0 10px 0;
}
.subtitle {
    text-align: center;
    font-style: italic;
    font-size: 14px;
    margin-bottom: 30px;
}
hr {
    margin: 40px 0;
    border: none;
    border-top: 2px solid #ddd;
}
a {
    color: #1155cc;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
p {
    margin: 10px 0;
}
strong {
    font-weight: bold;
}