ultra-minimalist mobile-responsive starter css code

starter.css

/* created for students of Purchase College-Math/Comp Sci Scripting For The Web course */
body {
    font-family: sans-serif;
    font-size: 1.2rem;
    line-height: 1.65em;
    max-width: 38em;
    margin: auto;
    color: #4a4a4a;
    padding: 13px;
}

@media (max-width: 684px) {
  body {
    font-size: 1.5rem;
  } 
}

@media (max-width: 382px) {
  body {
    font-size: 1.3rem;
  } 
}