.donate-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #ff5722;
    color: #fff;
    border-radius: 5px;
    text-decoration: none;
    font-size: 1rem;
    transition: background-color 0.3s ease;
    position: fixed;
    cursor: pointer;
    z-index: 9999;
}

@media screen and (max-width: 768px) {
    .donate-btn {
        right: 2rem;
        top: 5rem;
    }
}

@media screen and (min-width: 768px) {
    .donate-btn {
        right: 13rem;
        top: 8rem;
    }
}