Untitled

<body>
<div id="main">
    <div id="wr-content">
    <div class="header">лого</div>
  <div id=1>Пошел текст</div>
    </div>
</div>
<div id="footer">Низ</div>
</body>

html, body{
    height: 100%;
}

body{
    margin: 0;
    background-color: #c0deed;
    color: #fff;
}
    #main{
        width: 80%;
        background-color: white;
        margin: 0 auto;
        min-height: 100%;
        margin-bottom: -100px;
    }
    #footer{
        height: 100px;
        width: 80%;
        margin: 0px auto;
        background-color: silver;
        padding-bottom: -100px;
    }