I have a textarea that won't have 100% in width when I set it in CSS or plain HTML?

http://stackoverflow.com/questions/5445948

by Marcel

HTML

<h1>Full width &lt;textarea&gt;</h1>
<textarea>Adding border/margin/padding will make this &lt;textarea&gt; wider than 100%.</textarea>

CSS

body { padding:0; background:#eeeeed; }
body, textarea { font:13px/1.4 'segoe ui', sans-serif; }
h1 { margin:.25em 0 .5em 1em; font:700 30px/1.2 'myriad pro', sans-serif; }
textarea { width:100%; height:9em; border:0; }