attributo "media"             

<link rel="stylesheet" type="text/css" href="demo_print.css" media="print">

<link rel="stylesheet" type="text/css" href="demo_print.css" media="print and (resolution:300dpi)">

valori dispositivi: all || aural || braille || handheld || projection || print || screen || tty || tv

valori: width || height || device-width || device-height || orientation || aspect-ratio || device-aspect-ratio || color

          color-index || monochrome || resolution || scan || grid  [tra valori dispositivie e valori ... AND || NOT || , (virgola)]

Video guide     xx - xx