<?xml version="1.0" encoding="utf-8"?>

<odoo> 

        <template id="report_custom">

            <t t-foreach="docs" t-as="o">

                <div class="page" >

                    <style>

                            .table_border{border:1px solid black; padding: 5px; width:100%; border-collapse: collapse;}

                            .table_border tr td{border:1px solid black; padding: 2px;}

                    </style>

               </div>

             </t>

         </template>

</odoo>