body {
    background-color: rgb(255, 255, 255);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif; 
}

.main{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-items: center;
    
}

.Calculator{
    background-color: rgb(148, 161, 213);
    padding: 0.5rem;
    border-radius: 0.5rem;
    border:0.8rem black;


}

#Screen {
    width: 25rem;
    height: 7rem;
    margin:1.05rem;
    font-size: 36px;
    padding: 10px;
    text-align: right;
    box-sizing: border-box;
    border: 0.3rem black; 
    border-style:inset;
    color: #000000;
    background-color: #cacaca;
    border-radius: 10px;    
}

.Buttons {
    margin: 0.65rem;
    display: grid;
    grid-template-columns: 4;
    grid-template-rows: 5;
    grid-template-areas: 
    "mode-btn negation-btn clear-btn erase-btn "
    "num-7 num-8 num-9 multiply-btn"
    "num-4 num-5 num-6 divide-btn "
    "num-1 num-2 num-3 subract-btn"
    "decimal-btn num-0 equal-btn addition-btn";
}

#btn {
    padding: 1.3rem;
    margin: 0.2rem;
    font-size: 17px;
    border-radius: 0.9rem;
    background-color: #222327e9;
    color: white;

}

#btn:hover{
    color: black;
    background-color: white;
}


/* Media queries for responsiveness */
@media only screen and (max-width: 1023px) {
    .Calculator {
        padding: 0.4rem;
        border-radius: 0.3rem;
        border: 0.5rem black;
    }
    #Screen {
        width: 100%;
        height: 5rem;
        margin: 0rem;
        font-size: 24px;
        padding: 10px;
    }
    .Buttons {
        margin: 0.1rem;
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: auto;
        grid-template-areas: 
            "mode-btn negation-btn clear-btn erase-btn"
            "num-7 num-8 num-9 multiply-btn "
            "num-4 num-5 num-6 divide-btn "
            "num-1 num-2 num-3 subract-btn"
            "decimal-btn num-0 equal-btn addition-btn ";
    }
    #btn {
        padding: 1rem;
        font-size: 14px;
    }
}

@media only screen and (max-width: 320px) {
    .Calculator {
        padding: 0.3rem;
        border-radius: 0.2rem;
        border: 0.3rem black;
    }
    #Screen {
        height: 4rem;
        margin: 0.3rem;
        font-size: 20px;
        padding: 4px;
    }
    .Buttons {
        margin: 0.3rem;
        grid-template-columns: repeat(2, 1fr);
    }
    #btn {
        padding: 0.8rem;
        font-size: 12px;
    }
}