body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #34495e;
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    border-bottom: 5px solid #2c3e50;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    font-size: 1rem;
    margin-top: 0.5rem;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

section {
    padding: 2rem 0;
}

section h2 {
    color: #2c3e50;
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 0.5rem;
    margin-top: 0;
}

section h3 {
    color: #34495e;
    margin-top: 1.5rem;
}

p, ul {
    font-size: 1rem;
    margin-bottom: 1rem;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 0.5rem;
}

hr {
    border: 0;
    height: 1px;
    background-color: #ddd;
    margin: 2rem 0;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #34495e;
    color: white;
    margin-top: 2rem;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }
    main {
        margin: 1rem auto;
        padding: 0 1rem;
    }
    section {
        padding: 1rem 0;
    }
}