body{
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color:  #0b0205;
    font-family: "Mali", cursive;
    font-weight: 400;
    font-style: normal;
}

h2{
    font-size: 5rem;
    color: #DCCAE9;
    font-weight: bold;
    text-decoration: underline;
    margin: 20px;
    padding: 20px;
   
}

#calculator{
margin: 5px;
  background-color: #140e10 ;
  border-radius: 20px;
  max-width: 500px;
  overflow: hidden;
  box-shadow: 1px 4px 8px rgb(0, 0, 0, 1.5);
  border-top: 1px solid grey;
  border-bottom: 1px solid grey;
}
#display{
    width: 100%;
    padding: 20px;
    font-size: 4rem;
    text-align: left;
    border:none;
    background-color: #140e10;
    color: #ffffff;
    font-family: "Mali", cursive;
    font-weight: 500;
    border-bottom: 2px solid #2c2c2c;
    
}
#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: #391b47;
    color: #faf8f6;
    font-family: "Mali", cursive;
    font-weight: bold;
    font-size: 3rem;
    cursor:pointer;
}

button:hover{
    background-color: #896497;
}
button:active{
    background-color: hsl(280, 38%, 50%);
}

.operator-btn{
    background-color:  #7a4988	;
}

.operator-btn:hover{
    background-color: #410a4e;
}

.operator-btn:active{
    background-color: #2a0134;
}
@media (max-width: 550px) {
    h2 {
        font-size: 3rem;
        margin: 10px;
        padding: 10px;
    }

    #calculator {
        max-width: 90%;
    }

    #display {
        font-size: 2.1rem;
        padding: 10px;
    }

    #keys {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
        padding: 10px;
    }

    button {
        width: 60px;
        height: 60px;
        border-radius: 35px;
        font-size: 2rem;
    }
}