*{
    margin: 0px;
    padding: 0px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    box-sizing: border-box;
}

.container{
    width: 100%;
    height: 90vh;
    display: flex;
    background: #e3f9ff;
    justify-content: center;
}

.calculator{
    background: #3e4452;
    padding: 20px;
    border-radius: 10px;
}

.calculator form input{
    border: 0;
    outline: 0;
    width: 65px;
    height: 65px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1), 5px 5px 15px rgba(0, 0, 0, 0.2);
    background:transparent;
    font-size: 15px;
    color: #fff;
    cursor: pointer;
    margin: 5px;
}

form .display input{
    text-align: left;
    flex: 1;
    font-size: 26px;
    box-shadow: none;
}

form .display{
    display: flex;
    justify-content: flex-end;
    background-color: #606060;
    margin: 20px 0;
}

form input.plusminus{
    width: 145px;
}

form input.plus{
    height: 90px;
}

form input.equals{
    width: 145px;
    font-size: 25px;
}