*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins' , sans-serif;
    border-radius: 10px;
}

.container{
    width: 100%;
    height: 100vh;
    background: rgb(40, 40, 38);
    display: flex;
    align-items: center;
    justify-content: center;
}

.calculator{
    background: black;
    padding: 20px;
    border-radius: 10px;
}

  
.calculator form input{
    border: 0;
    outline: 0;
    width: 60px;
    height: 60px;   
    border-radius: 60px;
    background-color: rgb(50, 50, 48);
    font-size: 30px;
    color: white;
    margin: 10px;
}

form .display{   
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
}

form .display input{
    text-align: right;
    flex: 1;
    font-size: 45px;
    background-color: black;
}

form input.operator{
    background-color: orange;
}

form input.grey{
    background-color: rgb(121, 119, 119);
}
.img{
    width: 30px;
    height: 30px;
}
@media (max-width: 576px) {
    .input-group {
      flex-direction: column;
      align-items: center;
    }

    .input-group input {
      width: 120px;
    }
}