#body{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0
    
}

#calculator{
    font-family: Arial, sans-serif;
    background-color: rgba(41, 41, 41, 0.921);
    border-radius: 15 px;
    width: 400 px;
    overflow: hidden;
    box-shadow: 0px 10px 30px rgba(0,0,0,0.3;);
}
 #display{
    width: 80%;
    padding: 30px 20px;
    font-size: 5rem;
    text-align: right;
    border: none;
    background-color: rgba(84, 84, 84, 0.921);
    color: white;
    border-top-right-radius: 40px;
    border-top-left-radius: 40px;

 }

#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:coral;
    font-size: 3rem;
    cursor: pointer;



}
button:hover{
    background-color:antiquewhite;
}
    button:active{
        background:color:hsl(0, 0, 50)
}
.operator-btn{
    background:color:hsl(39, 100, 50)
}