h1{
    text-align: center;
}
.container{
    width: 460px;
    height: 640px;
    background-color: rgb(52, 52, 52);
    margin: auto;
    padding: 10px;
    border-radius: 10px;

}

P{
    margin-left: 10px;
    color:#FFF;
    font-size: 1.5rem;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;

}
#screen{
    background-color: rgb(150, 191, 209);
    height: 80px;
    width: 440px;
    margin: 5px;
    font-size: 4rem;
    text-align: right;
    border-radius: 10px;

}

.btn{
    background-color: rgb(66, 62, 62);
    color: #fff;
    width: 92px;
    height: 70px;
    margin: 10px;
    font-size: 2.5rem;
    border-radius: 15px ;
}

.clear{
    background-color: red;

}
.operator{
    background-color:rgb(130, 132, 130);
}
.result{
    width: 198px;
    font-size: 3.5rem;
    text-align: center;
    
}

.btn:hover{
    border: 5px solid yellowgreen;
}