html {
    font-size: 62.5%; /* This resets the root font-size to 10px so 1rem = 10ox. */
}

body {
    margin: 0;
    padding: 2rem;
    font-family: sans-serif;
    color: white;
    background: #00162b;
}

h1 {
    color: white;
    font-size: 2.4rem;
    margin-bottom: 4rem;
    text-align: center;

}

@media (min-width: 768px) {
    h1 {
        font-size: 4.1rem;
    }
}