.wrapper {
    width: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.conteiner {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

/* header */
.header {
    width: 100%;
    height: 60px;
    background: #333 repeating-linear-gradient(90deg,
            rgba(30, 15, 140, 0.36), rgba(37, 124, 201, 0.37) 5px,
            rgba(10, 26, 89, 0.38) 5px, rgba(123, 159, 225, 0.37) 10px);
    box-shadow: rgba(0, 0, 0, 0.17) 0px -23px 25px 0px inset, rgba(0, 0, 0, 0.15) 0px -36px 30px 0px inset, rgba(0, 0, 0, 0.1) 0px -79px 40px 0px inset, rgba(0, 0, 0, 0.06) 0px 2px 1px, rgba(0, 0, 0, 0.09) 0px 4px 2px, rgba(0, 0, 0, 0.09) 0px 8px 4px, rgba(0, 0, 0, 0.09) 0px 16px 8px, rgba(0, 0, 0, 0.09) 0px 32px 16px;
}

/* footer */
.footer {
    width: 100%;
    background: #333 repeating-linear-gradient(90deg,
            rgba(30, 15, 140, 0.36), rgba(37, 124, 201, 0.37) 5px,
            rgba(10, 26, 89, 0.38) 5px, rgba(123, 159, 225, 0.37) 10px);
}

/* page */
.main {
    flex: 1 1 auto;
    padding: 2px 10px;
}

.book_conteiner {
    width: 100%;
    margin: 5px auto;
    padding: 10px;
    background-color: #eee;
    box-shadow: 5px 5px 10px #606060;
}

.book_title {
    font-family: 'Pattaya', sans-serif;
    font-size: 25px;
    text-align: center;
}

.book_content {
    width: 100%;
    margin-top: 20px;

}

.book_items {
    width: 100%;
    display: flex;
    justify-content: left;
    align-items: center;
    gap: 10px;
    margin: 10px auto;
}

.book_item {
    position: relative;
    width: 300px;
    padding: 5px;
    box-shadow: 5px 5px 10px #606060;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book_image {
    width: 95%;
}

.book_btn_conteiner {
    width: 200px;
    height: 50px;
    position: absolute;
    bottom: 0px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    z-index: 10;
    font-family: Verdana, sans-serif;
    font-size: 15px;
}

.book_btn_next,
.book_btn_prev {
    width: 50px;
    height: 28px;
    background-color: #ccc;
    box-shadow: 5px 5px 10px #606060;
}

.book_btn_load {
    width: 80px;
    height: 28px;
    background-color: #ccc;
    box-shadow: 5px 5px 10px #606060;
}

/* Адаптация */
@media(max-width:1200px) {
    .conteiner {
        max-width: 970px;
    }
}

@media(max-width:992px) {
    .conteiner {
        max-width: 750px;
    }

    .book_btn_conteiner {
        gap: 5px;
    }
}

@media(max-width:767px) {
    .conteiner {
        max-width: none;
    }

    .book_items {
        justify-content: center;
    }

    .book_item {
        width: 358px;
    }

    .book_btn_conteiner {
        gap: 10px;
    }
}

@media(max-width:550px) {
    /*до 340px*/
}