.book_delivered,
input.books_input {
    position: absolute;
    right: 20px;
    top: 20px;
    height: 40px;
    width: 40px;
    z-index: 999;
}

.book_delivered {
    display: block;
    background-image: url("../images/order-confirm.png");
    background-repeat: no-repeat;
    background-size: contain;
}

.books-nav .nav-link {
    padding: 0.5rem 1rem;
}

.nav.books-nav {
    margin-bottom: 25px;
}