body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f9f9f9;
    color: #333;
}

header {
    background: #007BFF;
    color: white;
    padding: 1em;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .logo {
    height: 80px;
}

nav a {
    margin: 0 10px;
    color: white;
    text-decoration: none;
    font-weight: bold;
}

main {
    padding: 2em;
}

.main-img {
    width: 100%;
    max-width: 600px;
    margin-top: 1em;
}

footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1em;
    position: fixed;
    width: 100%;
    bottom: 0;
}