body{
    margin: 0;
    padding: 0;
    text-align: center;
    background-image: linear-gradient(to right bottom, rgb(7, 7, 131), rgb(10, 10, 51),rgb(11, 11, 33),rgb(11, 11, 33),rgb(10, 10, 51),rgb(7, 7, 131));
}
h1{
    color: rgb(57, 46, 218);
    font-size: 45px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
input{
    font-size: 35px;
    width: 75px;
    height: 50px;
    margin: 5px;
    border-radius: 10px;
    color: black;
    border: none;
    background-color: gray;
}
.calci{
    margin: 100px;
    margin-left: 550px;
    margin-right: 550px;
    padding: 4rem 2rem;
    border: 1px solid rgb(0, 0, 0);
    border-radius: 15px;
    background-image: url('Wallpaper.jpg');
    opacity: 0.7;
}
.btn:hover{
    background-color: rgb(181, 181, 181);
    cursor: pointer;
}