*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    height: 100vh;
    background-color: #F4BF96;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calculator{
    background-color: #3a4452;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 10px 20px rgba(0,0,0,0.5);
}
.calculator form input{
    border: none;
    outline: none;
    height: 60px;
    width: 60px;
    border-radius: 10px;
    font-size: 22px;
    margin: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1), 5px 5px 15px rgba(0,0,0,0.2);
    background: transparent;
    color: white;
    cursor: pointer;
}
#display{
    display: flex;
    justify-content: flex-end;     /* important */
    margin: 20px 0;
}
#display input{
    text-align: right;
    flex: 1;
    padding: 0px 10px;
    box-shadow: none;
    font-size: 40px;
    background: white;
    color: black;
}

#equals{
    width: 145px;
}
form input.operator{
    color: #33ffd8;
}