JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">Ein Beispieltext</div>

CSS

.box {
        width: 200px;
        height: 100px;
        background-color: lightgray;
        margin: 20px;
        padding: 20px;
        /* Innerer Rahmen */
        border: 5px solid blue;
        /* Äußerer Rahmen */
        outline: 5px solid red;
    }