JSFiddle - React, Tailwind, and code Playground

HTML

<table class="fancy">
                                        <tr class="header">
                                            <td style="width: 600px !important">Add</td>
                                            <td>Help</td>
                                        </tr>
                                        
                                        <tr>
                                            <td><input style="width: 575px !important" type="text" name="perronname" value="title"></td>
                                            <td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
                                        </tr>
                                        
                                        <tr>
                                            <td><textarea cols="70" rows="20" name="perrontext"></textarea></td>
                                            <td class="tdtop">
                                                <p><span class="hint_title">Text adjustement</span>
                                                    <span class="content">
                                                        - [b](text)[/b] for <b>Bold</b><br>
                                                        - [u](text)[/u] for <u>Underlined</u><br>
                                                        - [i](text)[/i] for <i>Italic</i><br>
                                                        - [s](text)[/s] for <s>Strike</s><br>
                                                        <br>
                                                        - [big](text)[/big] for big text<br>
                                                        - [medium](text)[/medium] for medium-large text<br>
                                                        -...

CSS

table.fancy tr, table.fancy td, table.fancy{
    background: #f7f7f7;
    padding: 3px;
    border-top: 1px solid #e0e0e0;
    border-right: 1px solid #e0e0e0;
}

table.fancy tr td:first-child {
    width: 400px;
}

table.fancy tr.header, table.fancy tr.header td {
    font-weight: bold;
    
    background: rgb(219,219,219); /* Old browsers */
    /* IE9 SVG, needs conditional override of 'filter' to 'none' */
    background: url(data:image/svg+xml;base64,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);
    background: -moz-linear-gradient(top,  rgba(219,219,219,1) 0%, rgba(247,247,247,1) 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(219,219,219,1)), color-stop(100%,rgba(247,247,247,1))); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top,  rgba(219,219,219,1) 0%,rgba(247,247,247,1) 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top,  rgba(219,219,219,1) 0%,rgba(247,247,247,1) 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top,  rgba(219,219,219,1) 0%,rgba(247,247,247,1) 100%); /* IE10+ */
    background: linear-gradient(top,  rgba(219,219,219,1) 0%,rgba(247,247,247,1) 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#dbdbdb', endColorstr='#f7f7f7',GradientType=0 ); /* IE6-8 */
}

table.fancy tr.header a {
    text-decoration:...