*{
    padding: 0;

    margin: 0;
    box-sizing: border-box;
}
body{
    background-color: aliceblue;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}
form{
    position: relative;
    left: 0;
    right: 0;
    margin: auto;
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    margin-top: 10rem;
    margin-left: rem;
    width: 20rem;
    text-align: center  ;
    box-shadow: 4px 3px 30px rgb(0.4, 0.4, 0.4, 0.4);
}
#original{
    width: 10rem;
    height: 3rem;
    border-radius: 10px;
    padding: 1rem;
    font-size: 20px;
    background-color: antiquewhite;
    border: 1px solid antiquewhite;
}

#discount{
    width: 10rem;
    height: 3rem;
    border-radius: 10px;
    padding: 1rem;
    font-size: 20px;
    background-color: antiquewhite;
    border: 1px solid antiquewhite;
}
#demo{
    background-color: rgb(255, 240, 247);
    padding: 0.3rem;
    margin-top: 1rem;
    border: none;
    text-align: center;
    font-weight: bold;
    font-size: 20px;
}

#submit{
    width: 10rem;
    padding: 0.3rem 0.3rem;
    background-color: blue;
    border: none;
    border-radius: 20px;
    color: 
    white;
    font-size: 20px;
    text-align: center;
    cursor: pointer;
    transition: 0.2s;

}
.per{
    font-weight: bold;
    font-size: 20px;
}
footer{
    width: 100%;
    text-align: center;
    padding: 0.3rem;
}
#submit:hover{
    background-color: crimson;
}
@media screen and (max-width: 768px) {
    form{
        width: 80%;   
    }
    #original, #discount{
        width: 70%;
    }
    #demo{
        width: 70%;
    }
}
@media screen and (max-width: 400px) {
    #submit{
        width: 80%;
    }
}