.nav {
    background-color: #e0e0e0;
    padding: 15px 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}
.nav a {
    color: #0056b3;
    text-decoration: none;
    font-size: 20px;
    font-weight: bold;
    padding: 10px 20px;
    border-radius: 4px;
    transition: all 0.3s ease;
}
.nav a:hover {
    background-color: #0056b3;
    color: white;
}