body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
   
}
.calculator{
    background-image: url(Calbg.jpg);
    background-size: cover;    
    background-position: center; 
    overflow: hidden;
    border-radius: 50px ;
   
}

#innerdiv{
    
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-width: 400px;
    margin: auto;
}

.display {
    width: 350px;
    height: 60px;
    overflow :hidden;
    white-space: nowrap;
    grid-column: span 4;
    background-color:rgb(116, 155, 198);
    border: 1px solid #dadada;
    border-radius: 30px;
    color: white;
    font-size: 2.57em;
    text-align: right;
    padding: 5px;
    box-sizing: border-box;
}

.btn {
    padding: 20px;
    font-size: 1.5em;
    background-color: rgb(116, 155, 198);
    border: 1px solid #dadada;
    border-radius: 30px;
    cursor: pointer;
    &:hover{
         background-color: #000000;
         transition:1s;
        color: white;
    }
}