body{
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
}

.parent{
    width:600px;
    height:300px;
}

.btn{
    width:100px;
    height:50px;
    font-size:15px;
    color:black;
    border: none;
    border-radius: 20px;
}