#body {
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    height:200vh;
    background-color: hsl(32, 100%, 51%);



}
body {width: 60%; margin: auto;}
#calculator {
    font-family: Arial, sans-serif;
    background-color: hsl(0, 0%, 15%);
    border-radius: 15px;
    max-width: 500px;
    overflow: hidden;
    margin: 0 auto; 
  }
  
#display{
    width: 100%;
    padding: 20px;
    font-size: 5rem;
    text-align: left;
    border: none;
    background-color: hsl(0, 0%, 20%);
    color: rgb(255, 255, 255);

}
#keys{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 25px;
}
button{
    width: 100px;
    height: 100px;
    border-radius: 50px;
    border: none;
    background-color: hsl(0, 0%, 30%);
    color: white;
    font-size: 3rem;
    font-weight: bold;
    cursor: pointer;
}

button:hover{

   background-color: hsl(0, 0%, 40%);


}
button:active{

    background-color: hsl(0, 0%, 50%);

}
.operator-btn{
    background-color: hsl(35, 100%, 55%);

}
.operator-btn:hover{
    background-color: hsl(35, 100%, 65%);


}
.operator-btn:active{
    background-color: hsl(35, 100%, 75%);


}



/* Styles for small screens */
@media only screen and (max-width: 768px) {
    #display {
      font-size: 2rem;
    }
    button{
        width: 50px;
        height: 50px;
        border-radius: 25px;
        border: none;
        background-color: hsl(0, 0%, 30%);
        color: white;
        font-size: 2rem;
        font-weight: bold;
        cursor: pointer;
    }
    #keys{
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 3px;
        padding: 10px;
    }
}