body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.box{
    width: 50vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 22vh;
    font-family: Arial, Helvetica, sans-serif;
    box-shadow: 10px 10px 50px  ;
    border-radius: 20px;
    /* color:   white; */
    background-color: white;
}
.on{
    width: 50%;
    
}