html, body, form {
    height: 100%;
}

    body:before {
        content: "";
        height: 100%;
        float: left;
        width: 0;
        margin-top: -32767px;
    }

* {
    margin: 0;
    padding: 0;
}

.wrap {
    width: 100%;
    height: 100%;
    min-height: 100%;
    overflow: hidden;
}

.tabla {
    display: table;
    width: 100%;
    height: 100%;
    margin: 0;
    margin-top: -22px;
}

.celda {
    display: table-cell;
    vertical-align: middle;
    position: relative;
    text-align: center;
}

    .celda img {
        max-width: 96%;
    }

.close {
    margin-top: 6px;
    margin-left: 6px;
    font-size: 1.2em;
}

    .close a:link {
        padding: 6px;
        color: #232323;
    }

    .close a:visited {
        color: #232323;
    }

.aviso {
    color: #808080;
    text-align: center;
    font-size: 0.9em;
    font-family: 'Open Sans';
    margin-top: 15px;
}