JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">

    <div class="left">
    Lorem    
    </div>
    <div class="right">
    Lorem ipsum dolor sit amet, consectetur adipiscing elit.
    </div>
</div>

CSS

.wrap{
    overflow:hidden;
    width:250px;
    display: table;
    border-collapse: collapse;
}


.left{
    width:100px;
    float:left;
    display: table-cell; 
    border-bottom:1px solid green;    
}


.right{
    width:150px;
    float:left;
    border-bottom:1px solid red; 
    display: table-cell;     
}