body {
    display: grid;
    place-items: center;
}

h1, p {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

pre {
    white-space: pre-wrap;
    word-break: break-word;
} 

img, .about {
    max-width: 300px;
}