body{
    padding: 0;
    background: none;
    background: linear-gradient(to left, #7808f0, #06bdf5 );
    
}
div{
    text-align: center;
    margin-top: 50px;
}
div h1{
    font-size: 72px;
}
div h2{
    font-size: 36px;
}
div h2 span{
    display: inline-block;
    color: white;
    margin: 0 80px;
}
.calform{
    width: 500px;
    padding-top: 100px;
    padding-bottom: 100px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: 0.25px;
    text-align: center;
}
#answer-display{
     background-color: whitesmoke;
     border: 2px solid white;
     border-radius: 35px;
     font-size: 22px;
     font-weight: 400;
     height: 55px;
     color: #222;
     margin-bottom: 5px;
}
.num-btn{
    width: 55px;
    height: 55px;
    border-radius: 50%;
    font-size: 22px;
    font-weight: 400;
    margin: 2px;
    background-color: wheat;
}
.oprator{
    width: 55px;
    height: 55px;
    border-radius: 50%;
    font-size: 22px;
    font-weight: 400;
    margin: 2px;
    transition: 0.25px;
    cursor: pointer;
}
.oprator:hover{
    background-color: #00d9ee;
}

#zero{
    width: 116px;
    height: 55px;
    border-radius: 32px;
    font-size: 22px;
    font-weight: 400;
    margin: 2px;
}