JSFiddle - React, Tailwind, and code Playground

HTML

<div style="float:left;clear:both" id="psP" class="nubeT">
    <div style="position: relative;" class="sortable">               <textarea type="text" id="n_pasos" name="n_pasos" style="display: none;">*step 1*step 2*step 3*step 4</textarea></div>
    <div style="position: relative;" class="sortable"><span class="stepNum inset">1</span><textarea placeholder="Escribe que hay que hacer en este paso" class="step valid"></textarea></div>
    <div style="position: relative;" class="sortable"><span class="stepNum inset">2</span><textarea placeholder="Escribe que hay que hacer en este paso" class="step valid"></textarea></div>
        <div style="position: relative;" class="sortable"><span class="stepNum inset">3</span><textarea placeholder="Escribe que hay que hacer en este paso" class="step valid"></textarea></div>
            <div style="position: relative;" class="sortable"><span class="stepNum inset">4</span><textarea placeholder="Escribe que hay que hacer en este paso" class="step valid"></textarea></div>
                <div style="position: relative;" class="sortable"><span class="stepNum inset">5</span><textarea placeholder="Escribe que hay que hacer en este paso" class="step"></textarea></div>
            </div><span onclick="crearPaso()" class="newStep fancyButton">+ insertar paso</span></div>

CSS

#psP{ margin-left:50px;margin-top:20px; position:relative; }

.newStep {
    cursor: pointer;
    float: right;
    font-size: 13px;
    margin-bottom: 0 !important;
    margin-left: 0 !important;
    margin-right: -12px;
    margin-top: 0 !important;
    padding: 3px 7px;
    width: 80px !important;
}
.step {
    border-top-left-radius: 0 !important;
    font-family: lucida Grande;
    margin:4px;
}
.stepNum {
    border-bottom-right-radius: 0;
    border-top-right-radius: 0;
    left: -20px;
    padding: 8px;
    position: absolute;
    top: 3px;
}
.inset {
    background: none repeat scroll 0 0 #E8E8E8;
    border-radius: 5px 5px 5px 5px;
    box-shadow: 0 0 3px #666666 inset;
}

JavaScript

$(function() {

    $('.sortable').sortable({
        placeholder: "ui-state-highlight",
        helper: 'clone'
    });

});