JSFiddle - React, Tailwind, and code Playground

by vals

HTML

<div class="back">
</div>

CSS

.back {
    height: 100px;
    width: 1000px;
    padding: 0px;
    background-image: radial-gradient(200px 100px ellipse at 50% 100%, transparent 70px, 
               rgba(100, 100, 100, 0.8) 73px, 
               rgba(80, 80, 80, 1) 198px), 
    linear-gradient(180deg, rgb(80, 80, 80), rgba(100, 100, 100, 0.8)), 
    linear-gradient(180deg, rgb(80, 80, 80), rgba(100, 100, 100, 0.8));
    background-size: 200px 100px, 40% 100%, 40% 100%;
    background-repeat: no-repeat;
    background-position-x: 50%, 0%, 100%;
    background-position-y: 100%;
}