body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #0d1b2a;
    background: #f9f9f9;
}

header, footer {
    background: #e0e0e0;
    padding: 15px 20px;
}

nav div {
    display: inline-block;
    margin-right: 15px;
}

a {
    text-decoration: none;
    color: #0d1b2a;
}

a:hover {
    color: #1d4ed8;
}

main {
    padding: 40px 20px;
}