h1 {
    margin: 0 auto;
}

h3 {
    max-width: 40em;
    font-size: 20px;
    padding: 1em;
    margin: 0 auto;
}

html, body {
    height: 100%;
}

#not-found-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
}

@media(min-width: 701px) {
    h1 {
        font-size: 75px;
    }
}
@media(max-width: 700px) {
    h1 {
        font-size: 40px;
    }
}