#container {
background: #fff;
width: 950px;
color: #333;
border: 1px solid #5d5d5d;
border-top: 20;
margin: 0 auto;
text-align: left;
}
<?php
<div="base 1">
<div= "base 2">
contenido
</div>
</div>
body {
background: #d0d1c9 url(images/nesil/arkaplan.jpg) repeat;
color: #333;
font-family: Tahoma, Verdana, Arial, Sans-Serif;
font-size: 13px;
text-align: center;
line-height: 1.6;
margin: 0 0 25px 0;
}
#container {
background: #fff;
width: 1050px;
color: #333;
border: 1px solid #5d5d5d;
border-top: 20;
margin: 0px;
margin-right: auto;
margin-left: auto;
text-align: left;
}