JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="algo" placeholder="Nombre" size="50">
    <br/><br/>Texto Cicklow

CSS

#algo{
    border:0px;
    border-bottom: 1px solid #333333;
    padding:5px;
}
#algo::-webkit-input-placeholder { color:#333; }
#algo::-moz-placeholder { color:#333; }