body{
    margin:0;
    background-color:#333333;
    height:100vh;
    justify-content: center;
    align-items:center;
    display:flex;
    flex-direction: column;
}
.element{
    background-color: #676767;
    display: inline-block;
    padding: 15px;
    border-radius: 10px;
}
.b1{
    background-color:#676767;
    border: 2px solid black;
    padding: 10px 15px;
    border-radius: 12px;
    margin:10px 5px ;
    display: inline-block;
}