body {
    line-height: 1.8;
    margin: 20px;
    padding: 20px;
    color: #333;
}

h1, h2, h3 {
    color: #222;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
    margin-top: 30px;
}

h1 {
    border-bottom: 2px solid #ddd;
}

p, ul {
    margin-bottom: 18px;
}

ul {
    list-style-type: square;
    padding-left: 25px;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
    background: #fafafa;
    border: 1px solid #e0e0e0;
}

.toc {
    background: #f5f5f5;
    padding: 15px;
    margin: 20px 0;
    border-left: 3px solid #007acc;
}

.highlight-box {
    background-color: #f0f8ff;
    border-left: 4px solid #0066cc;
    padding: 15px;
    margin: 20px 0;
}

@media print {
    .container {
        background: white;
        border: none;
    }
}