JSFiddle - React, Tailwind, and code Playground

HTML

<div class="przycisk">
    <span class="nazwa">Name</span>
    <div class="wykladowca">Some Longer data, even two lines</div>
    <div class="skrot deHover">skrot</div>
    <div class="godziny deHover">30</div>
    <div style="clear:both"></div>
</div>

CSS

.przycisk {
    cursor: pointer;
    color: #000000;
    width: 130px;
    padding: 5px 5px 5px 5px;
    margin: 0 auto;
    margin-bottom: 5px;
    background-color: #008000;
    -moz-border-radius: 25px;
    border-radius: 25px;
}


.przycisk.active {
    border: 4px solid #FF0000;
}
.przycisk .nazwa, .wykladowca, .godziny, .skrot {
    display: table;
    text-align: center;
    margin: 0 auto;
    overflow: hidden;
}
.nazwa {
    font-size: 12px;
    font-weight: bold;
}
.wykladowca {
    font-size: 12px;
    font-weight: bold;
}
.godziny {
    font-weight: bold;
    font-size: 12px;
    background: lightblue;
    padding: 5px 5px 5px 5px;
    -moz-border-radius: 25px;
    border-radius: 25px;
    float: right;
    margin-right: 10px;
}
.skrot {
    font-weight: bold;
    font-size: 12px;
    background: yellow;
    padding: 5px 5px 5px 5px;
    -moz-border-radius: 25px;
    border-radius: 25px;
    float: left;
    margin-left: 10px;
}
.skrot:hover {
    background-color: red;
}
[class=undefined]::after {
    content:'what the fuck?';
}
}

JavaScript

$('.deHover').hover(function(){
    $(this).parent().css('background-color', '#008000');
}, function(){
    $(this).parent().css('background-color', '#383');
});

$('.przycisk').hover(function(){
    $(this).css('background-color', '#383');
}, function(){
    $(this).css('background-color', '#008000');
});