box model

by zoho

HTML

<textarea>dddddddd</textarea>

CSS

html {
   background: gray;
   padding: 0;
   margin: 0;
   /*height: 100%;*/
}

body {
  margin: 0;
  padding: 10px;
  border: 2px solid green;
  background: blue;
}

textarea {
  border: 2px solid #444;
  padding: 10px;
}