JSFiddle - React, Tailwind, and code Playground

HTML

<table>

<tr>
                <td style="padding-top: 30px;">
                    <table bgcolor="#d2e8f0" width="650" align="center" border="0" cellpadding="0" cellspacing="0" class="w100">
                        <tr>
                            <td>
                                <table width="650" align="center" border="0" cellpadding="0" cellspacing="0" class="hideMobile">
                                    <tr>
                                        <td style="padding-bottom: 0px;padding-top:20px;text-align: left;color: #23386e;font-weight: bold;font-family: 'Akrobat',arial;font-size: 17px;line-height: 23px;">
                                                        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;L'ACTUALITÉ IT
                                                  </td>
 
                                    </tr>
                                </table>
                                <table width="100%" align="center" border="0" cellpadding="0" cellspacing="0" class="w100 showonmobile" style="width: 0; max-height: 0; overflow: hidden; display: none; visibility: hidden;">
                                    <tr>
                                        <td align="center">
                                                                        </td>
                                    </tr>
                                </table>
                            </td>
                        </tr>
                        <tr>
                            <td>
                                <table bgcolor="#d2e8f0" width="550" align="center" border="0" cellpadding="0" cellspacing="0" class="w80">
                                    <tr>
                                        <td style="padding: 30px 0px; display: flex;">
                                            <table bgcolor="#d2e8f0" width="160" align="left" border="0" cellpadding="0" cellspacing="0" class="w100">
                                                <tr>
                           ...

CSS

table {border:solid red;margin:3px;}