<div class="wrap">
<div class="main"></div>
</div>
.wrap {
display: flex;
justify-content: center;
margin: 40px auto 0;
}
.main {
background: #0aaaa0;
border-top-left-radius: 100px 150px;
border-top-right-radius: 100px 150px;
width: 200px;
height: 150px;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.