body{
    margin: 0;
    justify-content: center;
    align-items: center;
    display: flex;
    height: 100vh;
    background-color: rgb(202, 176, 214);
}

#calculator{
   background-color: rgb(12, 12, 12);
   font-family: 'Courier New', Courier, monospace;
   overflow: hidden;
   border-radius: 20px;
   max-width: 500px;
}

button {
    width: 100px;
    height: 100px;
    border-radius: 50px;
    border: none;
    background-color: rgb(113, 114, 105);
    color: white;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
}
#keys{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 25px;

}
#display{
    width: 100%;
    padding: 20px;
    font-size: 5rem;
    text-align: left;
    background-color: rgb(29, 29, 29);
    border: none;
    color: white;
    
}
button:hover {
    background-color: rgb(212, 194, 194);
}
button:active {
    background-color: rgb(229, 190, 236);

}

.operator-btn{
    background-color: rgb(224, 69, 191);
}
.operator-btn:hover{
    background-color: rgb(204, 165, 219);
}
.operator-btn:active{
    background-color: rgb(229, 190, 236);
}

@media (max-width: 600px) {
    #calculator {
        max-width: 90vw;
        border-radius: 15px;
    }
    
    #keys {
        gap: 8px;
        padding: 15px;
    }
    
    button {
        font-size: 1.2rem;
        max-width: 18vw;
    }
    
    #display {
        font-size: clamp(2rem, 10vw, 4rem);
        padding: 15px;
    }
}

@media (max-width: 400px) {
    #keys {
        gap: 6px;
        padding: 10px;
    }
    
    button {
        font-size: 1rem;
        max-width: 20vw;
    }
    
    #display {
        font-size: clamp(1.5rem, 8vw, 3rem);
        padding: 10px 15px;
    }
}


@media (max-height: 500px) and (orientation: landscape) {
    body {
        padding: 5px;
    }
    
    #calculator {
        max-width: 80vh;
        max-height: 90vh;
    }
    
    #display {
        font-size: 2.5rem;
    }
    
    button {
        max-width: 15vh;
    }
}