body{
    height: 100vh;
    
    display: flex;
    justify-content: center;
    align-items: center;
}
.calculator{
    height: 80vh;
    width: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px solid black;
    border-radius: 12px;
    background-color: whitesmoke;
}
input{
    height: 60px;
    width: 400px;
    border-radius: 12px;
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-left: 10px;
}
.buttons{
    display: grid;
    grid-template-columns: 90px 90px 90px 90px;
    grid-template-rows: 50px 50px 50px 50px ;
    gap: 10px 10px;
    
}
button{
    background-color: white;
    border-radius: 12px;
    font-size: 1.2rem;
}
#zero{
    grid-column: span 2;
}