*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins',sans-serif;
    box-sizing: border-box;
}

.container{
    width : 100%;
    height: 100vh;
    background: #e3f9ff;
    display: flex;
    align-items: center;
    justify-content:center ;
}

.calculator{
    background: #3a4452;
    padding: 20px;
    border-radius:10px ;
}

.calculator form input{
    border:0;
    outline:0;
    width:60px;
    height: 60px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgba(255,255,255,0.1), 5px 5px 15px rgba(0,0,0,0.2);
    color:#000000;
    font-size: 20px;
    cursor:pointer;
    margin: 10px;
}

form .display {
    display: flex;
    justify-content: flex-end;
    margin: 30px 0;
    height: 100px;
}

form .display input{
    text-align: right;
    flex: 1;
    font-size: 45px;
    padding: 20px;
    height:100px;
    box-shadow: none;
}

form input.equal{
    width: 145px;
}

.calculator form input.operator{
    color:rgb(215, 17, 17);
}