main {
margin: 0 10rem;
}

h1 {
    margin-top: 2rem;
    text-align: center;
}

h2,
h3,
h4,
h5 {
    margin: 1rem 10rem;
}

h6 {
    margin: 1rem 13rem 0.1rem 13rem;
}

p {
    margin: 0 15rem;
}

ul {
    margin: 0 18rem;
}

.navbar-nav {
    margin: 0;
}