body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f8f9fa;
    color: #333;
}

header {
    background: #2c3e50;
    color: white;
    padding: 20px;
}

header .logo h1 {
    margin: 0;
    font-size: 24px;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 15px;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    padding: 5px 10px;
}

header nav ul li a.active,
header nav ul li a:hover {
    background: #3498db;
    border-radius: 5px;
}

main {
    padding: 20px;
}

footer {
    text-align: center;
    background: #2c3e50;
    color: white;
    padding: 10px;
    margin-top: 20px;
}