estilos.css

*{
    padding:0;
    margin:0;
}

#contenedor{
    margin: 0 auto;
    min-height:500px;
    width:922px;
    border: 1px solid #ccc;
    overflow-x:auto;
}

#cabecera{
    color:#333;
    width: 900px;
    float:left;
    padding: 10px;
    border: 1px solid #ccc;
    height:100px;
    margin:10px 0px 5px 0px;
    background:#E7DBD5;
}

#navegacion{
    float:left;
    width:900px;
    color:#333;
    padding:10px;
    border: 1px solid #ccc;
    margin: 0px 0px 5px 0px;
    background:#BD9C8C
}

#col_izquierda{
    color:#333;
    border: 1px solid #ccc;
    background:#E7DBD5;
    margin:0px 5px 5px 0px;
    padding: 10px;
    height:350px;
    width:195px;
    float:left;
}

#col_derecha{
    float:right;
    color:#333;
    border:1px solid #ccc;
    background:#F2F2E6;
    margin: 0px 0px 5px 0px;
    padding: 10px;
    height: 350px;
    width:678px;
    display:inline;
}

#pie{
    width:900px;
    clear:both;
    color:#333;
    border:1px solid #ccc;
    background:#BD9C8C;
    margin:0px 0px 10px 0px;
    padding:10px;
}