King of JavaScript Online HTML Editor

<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Tic Tac Toe Result Screen</title>
<style>
.result{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 99;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    
}
.result h1{
    color: #fff;
    font-size: 50px;
    background: rgba(0,0,100,0.5);
    padding: 15px 25px;
}
.result button{
    font-size: 36px;
    background: #0909ad;
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
    padding: 10px 25px;
}
</style>
</head>
<body>
<div class="result">
   <h1>X Win the Game</h1>
   <button>Restart</button>
</div>
</body>
</html>