256 bytes of CSS are enough to get a beautiful, readable and adaptive website. Yes, 256B. It is 0,256 kb. Only 256 char and 6 lines. Even less minified and gzipped
Use "rem" unit as much as possible to keep user's size choices
Do not set colors to keep user's client preferences
Set a maximum width to 37rem ≈ 72 char to reduce eyes strain.
Remove link colors and set them bold to improve legibility
body,pre { padding: 1rem }
body { font: 1.1rem/1.4 system-ui; max-width: 37rem; margin: auto }
pre { overflow: auto; font-size: 1rem; border: 1px solid }
blockquote { font: italic 1rem serif }
a { color: inherit; font-weight:700 }
img { max-width: 100% }
Remember to have in your header :
<meta name="viewport" content="width=device-width" />
*{color:inherit;box-sizing:border-box}
body,pre{padding:1rem}
body{font:1.1rem/1.4 sans-serif;max-width:39rem;margin:auto}
pre{overflow:auto;font-size:1rem;border:1px solid}
blockquote{font:italic 1rem serif}
img{max-width:100%}
a:hover{font-weight:700}
*{color:inherit;box-sizing:border-box}
body,pre{padding:1rem}
body{font:1.1rem/1.4 sans-serif;max-width:39rem; margin:auto}
pre{overflow:auto;font-size:1rem;border:1px solid}
blockquote{font:italic 1rem serif}
img{max-width:100%}
h1,h2,h3{line-height:1.1}
D'autres ressources de CSS minimaliste sans avoir besoin de classes. Dit autrement, il suffit d'écrire du html brut et d'appliquer la feuille de style :