body {
    font-family: 'Courier New', Courier, monospace;
}
h1 {
    text-align: center;
}
h2 {
    text-align: center;
}
h3 {
    text-align: center;
}
form {
    text-align: center;
}
.flex-center { 
    display: flex;
    justify-content: center;
}
#content {
    margin-top: 5%;
}