body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    border-bottom: 2px solid #007AFF;
    padding-bottom: 10px;
}

h2 {
    color: #444;
    margin-top: 30px;
}

h3 {
    color: #555;
    margin-top: 25px;
}

p {
    margin-bottom: 15px;
}

ul, ol {
    margin-bottom: 15px;
    padding-left: 30px;
}

li {
    margin-bottom: 8px;
}

strong {
    color: #333;
}

a {
    color: #007AFF;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    padding: 8px 15px;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
}

.back-link:hover {
    background-color: #e9ecef;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #dee2e6;
    color: #666;
    font-size: 0.9em;
}