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

header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

nav {
    background: #444;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

nav a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}

main {
    padding: 20px;
    max-width: 1200px;
    margin: auto;
}

article {
    margin-bottom: 40px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: relative;
    bottom: 0;
    width: 100%;
}