/* For entire */
*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins',sans-serif;
    box-sizing: border-box;
}
.container{
    background: #02bff3;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Styling for calculator table */
.calculator{
    background: #3a4452;
    padding: 20px;
    border-radius: 20px;
}
.calculator form input{
    border: 0px;
    outline: 0;
    width: 60px;
    height: 60px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1),5px 5px 15px rgba(0, 0, 0, 0.2);
    background: transparent;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    margin: 10px;
}
/* display styling inside form tag */
form .display{
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
    border: 0px;
}
/* display input styling inside form tag */
form .display input{
    text-align: right;
    flex: 1;
    font-size: 45px;
    box-shadow: inset 5px;
    height: 10vh;
}
/* Styling for equal button */
form input.equal{
    width: 145px;
}
form input#color{
    color: #33ffd8;
}
/* Styling to hover over buttons */
.btn :hover{
    color: #3a4452;
    background: #b5b4b4;
}
/* Footer styling */
footer{
    text-align: center;
    background-color: #013a63;
    padding: 5px;
    position: absolute;
    bottom: 0;
    width: 100%;
    font-size: 14px;
    color: #fff;
    border-top: 2px solid #02bff3;
}
/* Styling for anchor tag of footer */
footer a{
    color: #02bff3;
    text-decoration: none;
}
/* Making contact details more attractive to user by hoverring contact details */
footer a:hover{
    text-decoration: underline;
    color: #02bff3;

}
/* @media is used to utilize for different resolution devices */
@media(max-width: 600px){
    footer{
        position: relative;
    }
    .calculator{
        width: 75%;
        padding: 15px;
        border: 0px;
        height: auto;
        font-size: 90%;
    }
    button{
        width: 20%;
        height: 60px;
        font-size: 10px;
        cursor: pointer;
    }
    #keyboard-input{
        font-size: 22px;
        height: 60px;
    }
}
@media (max-width: 400px){
    button{
        width: 22px;
        height: 50px;
        font-size: 16px;
        cursor: pointer;
    }
    #keyboard-input{
        font-size: 20px;
        height: 45px;
    }
}