body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}
header {
    background: #003366;
    color: white;
    padding: 1rem;
    text-align: center;
}
nav ul {
    background: #eaeaea;
    padding: 0.5rem;
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 1rem;
}
nav ul li a {
    text-decoration: none;
    color: #003366;
    font-weight: bold;
}
section {
    padding: 1.5rem;
    background: white;
    margin: 1rem auto;
    max-width: 900px;
    box-shadow: 0 0 8px #ccc;
}
footer {
    background: #003366;
    color: white;
    text-align: center;
    padding: 1rem;
    position: relative;
    bottom: 0;
    width: 100%;
}