body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: #f7f7f7;
    color: #333;
}

header {
    background: #1a1a1a;
    color: #fff;
    padding: 15px;
    text-align: center;
}

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

main {
    padding: 20px;
    max-width: 800px;
    margin: auto;
}

footer {
    text-align: center;
    padding: 10px;
    background: #1a1a1a;
    color: #fff;
    position: relative;
    bottom: 0;
    width: 100%;
}

img {
    margin: 10px;
    max-width: 100%;
    height: auto;
}