body{
    background-color: rgb(17, 92, 92);
    display: flex;
    flex-direction: column;
    align-items: center;
}
h1{
    color: rgb(250, 238, 238);
    font-size: 50px;
    text-align: center;
}
.box{
    width: 300px;
    height: 450px;
    background-color: rgb(131, 96, 51);
    padding: 30px;
    display: flex;
    flex-wrap: wrap;
}
#display{
    text-align: center;
    width: 100%;
    height: 55px;
    text-align: center;
    font-size: 25px;
    background-color: rgb(215, 230, 226);
}
.btn{
    width: 52px;
    height: 52px;
    border-radius: 50%;
    font-size: 38px;
    text-align: center;
    margin-left: 15px;
}
#clr{
    margin-left: 225px;
}