body {
    text-align: left;
    background-image: url(../img/fondo.png);
    background-repeat: repeat;
    background-size: 200px auto;
    background-color: #ccc;
    margin: 0;
    padding: 0;
    height: 100%;
}

html {
    height: 100%;
}

#pagina {
    font-family: "Segoe UI", "Trebuchet MS", Geneva, Arial, Helvetica, SunSans-Regular, sans-serif;
    margin: 0 auto;
    padding: 0;
    max-width: 1100px;
    width: 100%;
}

#contenedor {
    width: 100%;
    margin: 0;
    padding: 0;
}

#banner {
    height: 50px;
    background-image: url(../img/banner.jpg);
    background-repeat: repeat-x;
    background-size: auto 50px;
    background-position: left center;
    margin: 0;
    padding: 0;
    border: none;
}

#div_form {
    margin: 1px;
    float: left;
    width: 100%;
}