body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
}

h1, h2, h3 {
    color: #444;
}

header {
    background: #6c757d;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

nav {
    display: flex;
    justify-content: center;
    background: #f8f9fa;
    padding: 0.5rem;
}

nav a {
    margin: 0 1rem;
    color: #007bff;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

section {
    margin-bottom: 2rem;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background: #6c757d;
    color: #fff;
}

img {
    max-width: 100%;
    height: auto;
}