JSFiddle - React, Tailwind, and code Playground
by itsazzad
HTML
<div id="outer"><div id="inner"> </div></div>
CSS
#inner{
transform: rotate(45deg);
-ms-transform: rotate(45deg);
-webkit-transform: rotate(45deg);
-o-transform: rotate(45deg);
-moz-transform: rotate(45deg);
background-color: silver;
width: 100px;
height: 100px;
top: 20px;
left: -50px;
position: relative;
-moz-border-radius: 20px;
border-radius: 20px;
}
#outer {
position: absolute;
width: 70px;
height: 140px;
top: 20px;
left: 50px;
overflow: hidden;
transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-webkit-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
}