JSFiddle - React, Tailwind, and code Playground

HTML

<div class="kurswrapper">
			<div class="workshoptitel">
				Workshop Titel
			</div>
			<!-- Kursgruppe mit einer Spalte -->
			<div class="kursgroup">
				<div class="grouptitel">
					Gruppe 1
				</div>
				<div class="kurs_colsingle">
					<span>
						<div class="kurs_subgroup">
							Subgroup<br>
							<div class="kurs">
								<div class="kursid">
									<p>ST200</p>
								</div>
								<div class="kurs_main">
									<p>Überblick bla bla bla</p>
								</div>
								<div class="kurs_language">
									<p>EN<br>
									DE</p>
								</div>
							</div>				
						</div>
					</span>
				</div>
			</div>
			<!-- Kursgruppe mit mehreren Spalten -->
			<div class="kursgroup">
				<div class="grouptitel">
					Gruppe 2
				</div>
				<div class="kurs_colmulti">
					<span>
						<div class="kurs_subgroup">
							Subgroup2<br>
							<div class="kurs">
								<div class="kursid">
									<p><span>ST200</span></p>
								</div>
								<div class="kurs_main">
									<p>Überblick bla bla bla adsdas dasd asd asdasdqww adsa ds2wasdadasdasdasdqwe123123123123123sdasdsdasdasdasd asd1 2312 31231 231asda sda s dasdasdsfasfdsaf afasfdafda fdasfdasfdafdas fdasfdasf asdfa sfdaf safds asfdaf asf</p>
								</div>
								<div class="kurs_language">
									<p>EN<br>
									DE</p>
								</div>
							</div>
						</div>
					</span>
					<span>
						<div class="kurs_subgroup">
							Subgroup3<br>
							<div class="kurs">
								<div class="kursid">
									<p>ST200</p>
								</div>
								<div class="kurs_main">
									<p>Überblick bla bla bla</p>
								</div>
								<div class="kurs_language">
									<p>EN<br>
									DE</p>
								</div>
							</div>
						</div>
					</span>
					<span>
						<div class="kurs_subgroup">
							Subgroup4<br>
							<div class="kurs">
								<div class="kursid">
									<p>ST200</p>
								</div>
								<div class="kurs_main">
									<p>Überblick bla bla bla</p>
								</div>
								<div...

CSS

.kurswrapper {
	width: 900px;
	background-color: #c3c3c3;
	border-radius: 20px;
	text-align: center;
	min-height: 200px;
	font: .85em "Trebuchet MS", Arial, Sans-Serif;
	
}

.workshoptitel {
	font-size: 23px;
	color: #ffffff;
	width: 900px;
	background-color: #db0031;
	border-radius: 20px 20px 0px 0px;
	padding-bottom: 3px;
	padding-top: 3px;
}

.kursgroup {
	margin-top: 5px;
	color: #000000;
	font-size: 12px;
	padding-bottom: 10px;
	
}

.kurs_subgroup {
	background-color: #e8e9e9;
	width: 276px;
	border-radius: 15px;
	min-height: 75px;
	margin-left: 10px;
	margin-right: 10px;
	margin-top: 10px;
	float: left;
    align-items: center;
    justify-content: center;
}

.grouptitel{
	width: auto;
	height: 20px;
	font-weight: bold;
	border-bottom: 1px solid;
	border-color: #ffffff;
}

.kurs {
	border-radius: 15px 15px 15px 15px;
	background-color: #c5c5c5;
	width: 98%;
    margin-left: auto;
    margin-right: auto;
	min-height: 35px;
	margin-bottom: 10px;
	display: flex;
    align-items: center;
    justify-content: center;
}
.kurs:hover {

	background-color: #ff0000;
}

.kurs_colsingle {
	display: inline-block;
}

.kurs_colmulti {	
	display: inline-block;

}

.kursid {
   
	float: left;
	width: 43px;
	word-wrap:break-word;    
	word-break:break-all;

}


.kurs_language {
	float: left;
	width: 43px;
	word-wrap:break-word;
	word-break:break-all;

}
.kurs_main {
	border-right: 1px solid #585858;    
	border-left: 1px solid #585858;
	float: left;
	width: 190px;
	word-wrap:break-word;
	word-break:break-all;
}