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

article {
    width: 800px;
    height: 210px;
    justify-content: center;
    margin : 15px;
    background: black;
    border-radius: 15px;
    padding:15px;
}

article div {
    width :750px;
    background: #EEEEEE;
    padding: 20px;
    border-radius: 15px;
}