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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    margin-top: 20px;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

h2 {
    color: #2c3e50;
    margin-top: 30px;
    padding-bottom: 5px;
    border-bottom: 1px solid #eee;
}

h3 {
    color: #34495e;
    margin-top: 20px;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

section {
    margin-bottom: 30px;
}

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

@media (max-width: 600px) {
    .container {
        margin: 10px;
        padding: 15px;
    }
}