body {
    padding: 0;
    margin: 0;
    color: white;
    background-color: black;
}

.calculator {
    
    width: 500px;
    margin: auto;
    padding: 10px;
    border: 1px solid black;
    background-color: #ddd;
    background-color: rgb(22, 21, 21);
    border-radius: 20px;
    margin-top: 50px;
}

.first-number, .operator, .second-number {
    width: 70%;
    margin: 0 auto;
}

h1 {
    text-align: center;
}

#first-number {
    width: 100%;
    border-radius: 10px;
    height: 30px;
    font-size: 25px;
    /* background-color: rgb(70, 66, 66); */
    color: black;
    border: none;
}

#operator {
    width: 100%;
    margin-top: 10px;
    margin-bottom: 10px;
    border-radius: 10px;
    height: 30px;
    font-size: 25px;
    /* background-color: rgb(70, 66, 66); */
    color: black;
}

#operator:hover {
    cursor: pointer;
}

#second-number {
    width: 100%;
    border-radius: 10px;
    border: none;
    height: 30px;
    font-size: 25px;
    /* background-color: rgb(70, 66, 66); */
    color: black;
}

.result {
    width: 70%;
    
    margin: 0 auto;
    margin-top: 10px;
    margin-bottom: 10px;
    height: 30px;
    font-size: 25px;
    border-radius: 10px;
    
    color: white;
}


#get-result {
    float: left;
    height: 30px;
    font-size: 20px;
    border-radius: 10px;
    
}

#result-area {
    margin-left: 10px;
    margin-right: 10px;
    height: 30px;
    font-size: 25px;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 20px;
}

#clear {
    float: right;
    height: 30px;
    font-size: 20px;
    border-radius: 10px;
}

#get-result:hover, #clear:hover {
    background-color: rgb(70, 66, 66);;
    color: white;
    cursor: pointer;
    
}