body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #2c3e50;
    line-height: 1.6;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 20px 0;
    text-align: center;
}

main {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2rem;
    color: #3498db;
}

h2 {
    color: #2980b9;
    margin-top: 30px;
}

ul {
    padding-left: 20px;
}

ul li {
    margin-bottom: 10px;
}

code {
    background-color: #ecf0f1;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: Consolas, monospace;
}

strong {
    color: #34495e;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding: 20px;
    font-size: 0.9rem;
    color: #777;
}

pre {
    background-color: #f4f4f4;
    padding: 10px;
    overflow-x: auto;
    border-radius: 5px;
    margin-top: 10px;
}