body {
    background-color: white;
}

.container {
    height: 600px;
    width: 320px;
    background-color: #f5f4f6;
    border-radius: 15px;
    margin: 20px auto;
    position: relative;
    box-shadow: -10px 20px 40px rgb(82, 82, 82,.4);
}

.container h3 {
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 500;
    font-size: 18px;
    position: absolute;
    left: 100px;
    top: 10px;
    color: #464449;
    font-weight: bold;
}

.container #result {
    background-color: #f9f9f9;
    width: 100%;
    max-width: 100%;
    position: absolute;
    top: 50px;
    color: #9d9c9c;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    padding: 20px 0px;
    font-size: 20px;
    /*overflow: scroll;*/
}

.container #input {
    width: 90%;
    position: absolute;
    top: 120px;
    right: 20px;
    color: #000000;
    font-family: Arial, Helvetica, sans-serif;
    text-align: right;
    padding: 10px 0px;
    font-size: 25px;
}

.container #keyboard {
    background-color: white;
    max-width: 88%;
    height: 63.5%;
    border-radius: 15px;
    border-top-right-radius: 30px;
    border-top-left-radius: 30px;
    position: absolute;
    top: 200px;
    padding: 10px 20px;
    position: relative;
}

.container #keyboard button {
    float: left;
    height: 50px;
    width: 50px;
    margin: 6px 10px;
    cursor: pointer;
    border-radius: 50px;
    outline: none;
    border: none;
    font-size: 15px;
}

.blank {
    visibility: hidden;
}

.container #keyboard .number {
    background: none;
    color: black;
}
.container #keyboard .number:active {
    background-color: rgb(216, 212, 212); 
    outline: none;
    font-size: 20px;
}

.container #keyboard .operator:active {
    outline: none;
    font-size: 20px;
}

.container #keyboard :nth-child(1){
    background-color: rgb(216, 212, 212);    
}

.container #keyboard :nth-child(2){
    background-color: rgb(216, 212, 212);    
}

.container #keyboard :nth-child(3){
    background-color: rgb(216, 212, 212);    
}

.container #keyboard :nth-child(4){
    background-color: rgb(216, 212, 212);    
}

.container #keyboard :nth-child(8){
    background-color: rgb(182, 224, 235);    
}

.container #keyboard :nth-child(12){
    background-color: rgb(255, 192, 82);    
}

.container #keyboard :nth-child(16){
    background-color: rgb(195, 245, 170);    
}
/*this is the period 4 decimal*/
.container #keyboard :nth-child(19){
    background: none;
    font-weight: bold; 
}

.container #keyboard :nth-child(19):active{
    background-color: rgb(216, 212, 212); 
    outline: none;
    font-size: 20px;
}

.container #keyboard :nth-child(20){
background-color: rgb(235, 182, 229);    
}

.container #keyboard :last-child { 
    margin: 13px 0 13px 25px;
    width: 85%;
    background-color: rgb(193, 237, 193);
}