html {
  height: 100%;
}
body {
color:#222;
background-color:#7D98AF;
margin: 0 auto;
padding: 0;
text-align:center;
font: 80% verdana, sans-serif;
    }
  #contenitore{
background-color:#fff;
margin: 0 auto;
border:3px solid #ddd;
padding: 5px;
text-align:center;
width: 750px;
 margin-top:26px;
}

#contenitore2{
background-color:#fff;
margin: 26px auto;
border:3px solid #ddd;
padding: 10px;
text-align:justify;
width: 600px;
}

#contenitore3{
background-color:#fff;
margin: 26px auto 15px auto;
border:3px solid #ddd;
padding: 10px;
text-align:justify;
width: 750px;
}

h4 {
text-align:left;
font:bold 1.2em Verdana,Arial,Sans-serif;
color:#8898A0;
background-color: #f0f0f0;
padding:2px 2px 2px 4px;
}

h3{
font: 200% verdana, sans-serif;
color:#7D98AF;
text-align:left;
letter-spacing:-1px;
 border-bottom:13px solid #f0f0f0;
}

.centrato{
text-align:center;
}