body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    color: #333;
}
h1 {
    color: #2c3e50;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}
h2 {
    color: #34495e;
    margin-top: 30px;
}
h3 {
    color: #7f8c8d;
}
.toc {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 30px;
}
.toc ul {
    padding-left: 20px;
}
.toc li {
    margin-bottom: 5px;
}
.toc a {
    text-decoration: none;
    color: #3498db;
}
.toc a:hover {
    text-decoration: underline;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
table, th, td {
    border: 1px solid #ddd;
}
th, td {
    padding: 12px;
    text-align: left;
}
th {
    background-color: #f2f2f2;
}
tr:nth-child(even) {
    background-color: #f9f9f9;
}