body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

header {
    background-color: #333;
    color: white;
    padding: 12px;
    font-size: 18px;
}

.topnav {
    display: flex;
    justify-content: center;
    background-color: #444;
    padding: 10px 0;
}

.topnav a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    transition: background 0.3s ease;
}

.topnav a:hover {
    background-color: #8bbcea;
}

.logo {
    margin-top: 20px;
    max-width: 80%;
    height: auto;
}