Comment by FrontAid

I think this does not work well for mobile devices. Spacing and the font size is too large. Hence, a lot of screen space is wasted and the user has to scroll more. Larger font sizes on mobile are usually not a good idea as the device tends to be closer to your eyes anyway.

A snippet that could work better in my opinion is the following:

    html {
      max-width: 70ch;
      /* larger spacing on larger screens, very small spacing on tiny screens */
      padding: calc(1vmin + .5rem);
      /* shorthand for margin-left/margin-right */
      margin-inline: auto;
      /* fluid sizing: https://frontaid.io/blog/fluid-typography-2d-css-locks-clamp/ */
      font-size: clamp(1em, 0.909em + 0.45vmin, 1.25em);
      /* use system font stack: https://developer.mozilla.org/en-US/docs/Web/CSS/font-family */
      font-family: system-ui
    }

    /* increase line-height for everything except headings */
    body :not(:is(h1,h2,h3,h4,h5,h6)) {
      line-height: 1.75;
    }