CSS - Fondo

div {

    font-size: x-large;

    background: #fff3c3;

    text-align: center;

 }

.t2{

    position: absolute;

    left: 100px;

    top: 580px;

}

<div >

<table border="2.5px" class="t1">

    <tr>

        <td class="prueba">&nbsp;&nbsp;PROVEEDOR: &nbsp;&nbsp;</td>

        <td>&nbsp;&nbsp;

            <?php

            $query = $mysqli -> query ("select * from manejo where MESA = 10 and LINEA= 1 order by FECHA_PROCESO desc limit 1");

            while ($valores = mysqli_fetch_array($query)){

            echo "  ". $valores ["PROVEEDOR"]."  ";

            }

        ?>  

        </td>

        <td class="prueba">&nbsp;&nbsp;C. Disponibles:&nbsp;&nbsp;</td>

        <td>&nbsp;&nbsp;

            <?php

            $query = $mysqli -> query ("select * from manejo where MESA = 10 and LINEA= 1 order by FECHA_PROCESO desc limit 1");

            while ($valores = mysqli_fetch_array($query)){

            echo "  ". $valores ["CANASTILLAS_DISPONIBLES"]."  ";

            }

        ?>  

        </td>

    </tr>

    <tr>

        <td class="prueba">&nbsp;&nbsp;MESA:&nbsp;&nbsp;</td>

        <td>&nbsp;&nbsp;

            <?php

            $query = $mysqli -> query ("select * from manejo where MESA = 10 and LINEA= 1 order by FECHA_PROCESO desc limit 1");

            while ($valores = mysqli_fetch_array($query)){

            echo "  ". $valores ["MESA"]."  ";

            }

        ?>  

        </td>

        <td class="prueba">&nbsp;&nbsp;C. Asiganadas:&nbsp;&nbsp;</td>

        <td>&nbsp;&nbsp;

            <?php

            $query = $mysqli -> query ("select * from manejo where MESA = 10 and LINEA= 1 order by FECHA_PROCESO desc limit 1");

            while ($valores = mysqli_fetch_array($query)){

            echo "  ". $valores ["CANASTILLAS_RESTANTES"]."  ";

            }

        ?>  

        </td>

    </tr>

    <tr>

        <td>

        </td>

        <td></td>

        <td class="prueba">&nbsp;&nbsp;C. Restantes:&nbsp;&nbsp;</td>

        <td>

             

        <?php

            $query = $mysqli -> query ("SELECT (CANASTILLAS_DISPONIBLES-CANASTILLAS_RESTANTES) as tr FROM `manejo` WHERE LINEA=1 and mesa=10 order by FECHA_PROCESO desc limit 1");

            while ($valores = mysqli_fetch_array($query)){

            echo "  ". $valores ["tr"]."  ";

            }

        ?>  

        </td>

    </tr>

</table>

.t1{

    position: absolute;

    left: 100px;

}

.t2{

    position: absolute;

    left: 100px;

    top: 580px;

}

.t3{

    position: absolute;

    left: 100px;

    top: 680px;

}

.t4{

    position: absolute;

    left: 100px;

    top: 780px;

}

.t5{

    position: absolute;

    left: 100px;

    top: 880px;

}

.t6{

    position: absolute;

    left: 100px;

    top: 980px;

}

div {

    font-size: x-large;

    background: #fff3c9;

    text-align: center;

    position:relative;

 }