JSFiddle - React, Tailwind, and code Playground

HTML

<div id=reklama>eee</div>
<div id="center">
    <div id=tekst-naglowek>eeee</div>
    <div id=tekst>eee</div>
</div>
<div id="right">
    <div id=bok-naglowek>ee</div>
    <div id=bok>ee</div>
</div>

CSS

#reklama {
    float: left;
    margin: 0 20px;
    border-radius: 10px;
    background-color: rgba(0, 0, 0, 0.21);
    height: 500px;
    width: 260px;
}
#center{width: 48%;}
#center,#right{float:left;}
#tekst-naglowek {
    height: 24px;
    background-color: rgba(0, 0, 0, 0.70);
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    text-shadow: 0.1em 0.1em 0.2em black;
    color: white;
    word-wrap: break-word;
    overflow: hidden;
    padding-left: 8px;
    padding-right: 8px;
    padding-top: 4px;
    font-size: 20px;
    font-family: fantasy;
    position: relative;
}
#tekst {
    height: 400px;
    background-color: rgba(0, 0, 0, 0.31);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    color: white;
    word-wrap: break-word;
    overflow: hidden;
    padding-left: 8px;
    padding-right: 8px;
    padding-top: 4px;
}
#bok-naglowek {
    margin: 20px;
    margin-bottom: 0px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    background-color: rgba(0, 0, 0, 0.50);
    height: 20px;
    width: 260px;
    text-align: center;
    margin-top: 0px;
}
#bok {
    margin: 20px;
    margin-top: 0px;
    background-color: rgba(0, 0, 0, 0.21);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    width: 260px;
    height: 480px;
}