body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

h1 {
    text-align: center;
}

.nav {
    text-align: center;
    margin-bottom: 20px;
}

.nav button {
    margin-right: 10px;
    padding: 10px 15px;
    cursor: pointer;
}

.email {
    border: 1px solid #ccc;
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
}