body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f9f9f9;
    color: #333;
}
header {
    background: #1a1a1a;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header img {
    height: 50px;
}
nav a {
    color: #fff;
    margin-left: 20px;
    text-decoration: none;
}
main {
    padding: 40px 20px;
    max-width: 1000px;
    margin: auto;
    background: #fff;
}
footer {
    text-align: center;
    padding: 20px;
    background: #1a1a1a;
    color: #ccc;
    margin-top: 40px;
}