body{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}
#Calculator{
    max-width:600px;
    margin: 100px;
    padding: 20px;
    border: 2px solid black;
    border-radius: 20px;
    background-color: rgb(65, 0, 125);  
    overflow: hidden; 
}
#display{
    width: 100%;
    padding: 20px;
    border-radius: 20px;
    text-align: right;
    outline: none;
    box-sizing: border-box;
    font-size: 50px;
}

#keys{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 10px;
    font-family: Arial, Helvetica, sans-serif;
    

}

#keys button{
    background-color: rgb(175, 215, 230);
    color: black;
    font-size: 50px;
    text-align: center;
    width: 125px;
    height: 125px;
    border-radius: 20px;
    cursor: pointer;
    border: 2px solid black;
    
}

#keys button.Right-symbol{
    background-color: orange;
}
#keys button.Top-symbol{
    background-color: darkcyan;
}
#keys button:hover {
    filter: brightness(120%);
    transform: scale(1.02);
}
#keys button:active{
    filter: brightness(75%);
    transform: scale(0.98);
}