.binary-calculator{
    width: 33%;
}

.binary-calculator .binary-calculator__result{
    background-color: lightgray;
    border: solid;
    height: 48px;
    font-size: 20px;
}

.binary-calculator .binary-calculator__btn_operand{
    background-color: lightgreen;
    color: brown;
}

.binary-calculator .binary-calculator__btn_result{
    background-color: darkgreen;
    color: white;
}

.binary-calculator .binary-calculator__operators button{
    background-color: black;
    color: red;
}

.binary-calculator button{
    width: 25%;
    height: 36px;
    font-size: 18px;
    margin: 0;
    float: left;
}

.binary-calculator section{
    clear: both;
}