.calculator {
    width: 400px;
    margin:100px auto;
    border: 2px solid #000000;
    border-radius: 15px;
    background-color: #363434;
    overflow: hidden;
}
.btns {
    margin-top: 15px;
    display: grid;
    grid-template-columns:auto auto auto auto;
}
input{
    width: 100%;
    height: 80px;
    background-color: rgb(44, 43, 43);
    color: white;
    font-size: 30px;
}
button{
    background-color: #000000;
    color: white;
    width:80%;
    height: 80px;
    font-size: 25px;
    margin: 3px;
    border-radius:50%;
    border: none;
}
button:hover{
    background-color: rgba(0, 0, 0, 0.107);
}
button:active{
    background-color: rgb(89, 88, 88);
}
.org{
    background-color: orange;
    color: black;
}
.org:hover{
    background-color: darkorange;
}
.org:active{
    background-color: rgb(255, 198, 129);
}