@media(max-width: 1660px) {
    #about {
        background: url("../img/textbook-new/bgabout-right.png") no-repeat 100% 50%/350px, url("../img/textbook-new/bgabout-left.png") no-repeat 0 50%/350px;
    }
}

@media(max-width: 1500px) {
    .about_abs {
        margin-right: 180px;
    }
}

@media(max-width: 1440px) {
    #about {
        background: url("../img/textbook-new/bgabout-right.png") no-repeat 100% 50%/250px, url("../img/textbook-new/bgabout-left.png") no-repeat 0 50%/250px;
    }
    #banner_big .h2 {
        font-size: 60px;
        line-height: 68px;
    }
    #banner_big .h3 {
        font-size: 38px;
        line-height: 44px;
    }
    #banner_big .h4 {
        font-size: 20px;
        line-height: 24px;
    }
}
@media(max-width: 1420px) {
    .block_submenu {
        padding: 0 10px;
    }
}
@media (max-width: 1400px) {
    #about .container {
        padding: 53px 10px 81px!important;
    }
    .order__row {
        flex-wrap: wrap;
        justify-content: center;
    }
}
@media(max-width: 1270px) {
    .reviews__container {
        max-width: 1070px;
    }
}
@media(max-width: 1250px) {
    #banner_big .h2 {
        font-size: 40px;
        line-height: 48px;
    }
    #banner_big .h3 {
        font-size: 28px;
        line-height: 34px;
    }
    .about_abs {
        width: 415px;
    }
}
@media(max-width: 1200px) {
    #about {
        background: none;
    }
    #reviews .flex-direction-nav .flex-prev {
        left: 10px !important;
    }
    #reviews .flex-direction-nav .flex-next {
        right: 10px !important;
    }
}
@media(max-width: 1119px) {
    #carouseltasks {
        background-size: 100% 100%;
    }
    .order__label {
        flex: 0 1 300px;
    }
    #registration fieldset label.form__elem {
        min-width: 300px;
        max-width: 300px;
    }
    #registration .total__price {
        min-width: 300px;
    }
    #registration .total__button {
        min-width: 300px;
    }
}
@media(max-width: 1100px) {
    .use__amount {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
    .form__check {
        flex-basis: 61px;
    }
    .form__cost {
        flex-basis: 100px;
        font-size: 20px;
    }
    .form__text {
        font-size: 20px;
    }
    #banner_big {
        background: url("../img/textbook-new/books-top.png") no-repeat 0 0/contain;
        padding: 80px 0;
    }
    #banner_big img {
        display: none;
    }
    #banner_big .container {
        position: static;
    }
    .about_abs {
        float: none;
        margin: 0 auto;
    }
    .book-info__row.currency {
        padding-right: 84px;
    }
    .form__cost svg {
        max-height: 15px;
    }
}
@media(max-width: 1080px) {
    #reviews .flexslider {
        max-width: 715px;
        margin: 0 auto;
    }
    #reviews .flex-direction-nav .flex-prev {
        left: -35px !important;
    }
    #reviews .flex-direction-nav .flex-next {
        right: -35px !important;
    }
    .reviews .add {
        margin-right: 10px;
    }
}
@media(max-width: 1050px) {
    #carouseltasks {
        height: 523px;
    }
}
@media (max-width: 1018px) {
    .block_question1 {
        margin-top: 0;
    }
}
@media(max-width: 1024px) {
    .textbook-heroes {
        position: relative;
    }
    #heroes h3 {
        position: static;
    }
    #heroes h3 span {
        right: 0;
        top: 57px;
        bottom: inherit;
    }
    .form__text {
        display: flex;
        flex-direction: column;
    }
    #wrapper {
        padding-top: 115px;
    }
    header .block_submenu .container {
        flex-wrap: wrap;
        padding-top: 5px!important;
    }
    .block_submenu__info {
        justify-content: space-between!important;
        flex: auto;
    }
    #banner_big .h2 {
        font-size: 40px;
        line-height: 48px;
    }
    #banner_big .h3 {
        font-size: 28px;
        line-height: 34px;
    }
    #banner_big .h4 {
        font-size: 18px;
        line-height: 22px;
    }

    .about__links {
        top: 180px;
    }
}
@media(max-width: 1012px) {
    .slides .li2 {
        padding-right: 2em !important;
    }
}
@media(max-width: 1000px) {
    #carouseltasks {
        height: 514px;
    }
    #reviews .flex-direction-nav .flex-prev {
        left: -35px !important;
    }
    #reviews .flex-direction-nav .flex-next {
        right: -35px !important;
    }
    #registration fieldset {
        flex-direction: column;
    }
    .order__label {
        flex: 0 1 auto;
    }
    #registration fieldset .payment {
        align-items: flex-start;
    }
    #registration .total .order__label {
        width: 300px;
        margin: 0 auto;
    }
    #registration fieldset .for-label,
    #registration fieldset label.form__elem{
        margin: 0 auto;
    }
    #registration fieldset .payment .form__elem {
        margin: 0 auto;
    }
}
@media(max-width: 930px) {
    .block_question2 .d-flex div .d-flex > .ml-4 {
        display: none !important;
    }
}
@media(max-width: 900px) {
    .radio-wrap {
        flex-direction: column;
        align-items: flex-start;
    }
    #carouseltasks {
        height: 480px;
    }
    .footer img {
        margin-right: 59px;
    }
    #heroes h3 span::before {
        left: 150px;
    }
}
@media(max-width:850px) {
    #carouseltasks {
        height: 444px;
    }
}
@media(max-width: 800px) {
    #reviews .flex-direction-nav .flex-prev {
        left: 10px !important;
    }
    #reviews .flex-direction-nav .flex-next {
        right: 10px !important;
    }
    .about_abs {
        padding-left: 70px;
    }
    .form__elem:first-child {
        padding-left: 15px;
    }
    .use, #heroes .bg {
        overflow: hidden;
    }
    #carouseltasks {
        height: 100%;
    }
    .block_question2 .d-flex div .d-flex > .ml-4 {
        display: flex!important;
    }
    .oferta-absolute{
        position: initial;
    }
}
@media(max-width: 750px) {
    .use__row:before,
    .use__row:after {
        display: none;
    }
    #banner_big {
        background: url("../img/textbook-new/books-top.png") no-repeat 0 50%/auto 80%;
    }
    #reviews .flexslider {
        max-width: 350px;
    }
    .footer .block_submenu a {
        padding: 0;
    }
    .footer .block_submenu a:not(:last-child) {
        margin-right: 10px;
    }
    .footer img {
        margin-right: 30px;
    }
    .about_abs {
        padding-left: 35px;
    }
    #heroes h3 span::before {
        left: 40%;
    }
}

@media(max-width: 700px) {
    .view-tutorial__list {
        flex-wrap: wrap;
        justify-content: space-around;
    }
    .form__elem:first-child {
        padding-left: 15px;
    }
    .book-info__text {
        padding-left: 15px;
    }
    .form__cost {
        flex-basis: 81px;
    }
    .form__check {
        flex-basis: 50px;
    }
    .book-info__image {
        display: none;
    }
    #heroes h3 span::before {
        left: 50%;
    }
    .about__link {
        width: 180px;
        padding: 0 18px 0 45px;
    }
    .book-info__row.currency {
        padding-right: 55px;
    }
}
@media (max-width: 655px) {
    #banner_big {
        background: none;
        padding: 36px 0;
    }
    .about_abs {
        width: 350px;
        margin: 0;
    }
    .block_submenu__info {
        flex-wrap: wrap;
        justify-content: center !important;
        gap: 10px;
        padding: 0 38px 10px;
    }
    #wrapper {
        padding-top: 148px;
    }
    header img {
        max-width: 46px;
    }
    .form {
        gap: 15px;
    }
    .form__row {
        gap: 15px;
    }
    .reviews h3 {
        padding-left: 10px;
    }
    .footer .block_submenu a {
        font-size: 15px;
    }
    .book-info__row.currency {
        padding-right: 44px;
    }
    #heroes h3 span {
        width: 100%;
        padding: 10px 18px;
    }
    #heroes h3 span {
        top: 46px;
    }
    .about__links {
        top: 210px;
    }
}
@media(max-width: 560px) {
    #registration {
        background-size: cover;
    }
}
@media(max-width: 540px) {
    .about_abs {
        padding-left: 0;
    }
}
@media(max-width: 522px) {
    #heroes h3 span {
        width: 100%;
        top: 50px;
        padding: 10px 18px;
    }
    .footer .block_submenu .container {
        flex-wrap: wrap;
        justify-content: center !important;
        padding: 10px !important;
        gap: 20px;
    }
    .footer .block_submenu .container > .d-flex {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    #tasks .container {
        padding: 0 10px!important;
    }
    .footer .container > .d-flex > .d-flex {
        gap: 10px;
        padding-left: 10px;
        flex-wrap: wrap;
    }
    footer .bgfoot .d-flex .d-flex > div {
        width: 100%;
        text-align: center;
    }
}
@media(max-width: 500px) {
    .form__row {
        flex-wrap: wrap;
        justify-content: center;
    }
    .form__elem:first-child {
        padding-left: 15px;
        flex: 100%;
    }
    .bgfoot {
        padding-left: 10px;
        padding-right: 10px;
    }
    .footer img {
        max-width: 100px;
    }
    .about_abs {
        width: 266px;
    }
    .block_submenu__info {
        padding: 0 0 10px;
    }
    .book-info__row.currency {
        justify-content: center;
        padding-right: 0;
    }
}
@media(max-width: 491px) {
    #heroes h3 {
        padding-bottom: 90px;
    }
}
@media(max-width: 478px) {
    header .block_submenu .container {
        justify-content: center !important;
        gap: 10px;
    }
    #wrapper {
        padding-top: 190px;
    }
    .about__links {
        top: 250px;
    }
}
@media(max-width: 460px) {
    .order__title {
        font-size: 40px;
    }
    .amount, .amount:last-child {
        width: 100%;
    }
    .total, .inf b {
        font-size: 24px;
    }
    .hidden span.span-last {
        margin: 10px auto 0;
    }
}
@media (max-width: 450px) {
    #banner_big {
        height: auto;
    }
    .footer img {
        margin: 0 auto;
    }
    .block_submenu .link_reg a {
        width: 100px;
        font-size: 16px;
        line-height: 22px;
    }
    .block_submenu .but_buy .but-buy__button {
        width: 100px;
        font-size: 16px;
        line-height: 22px;
    }
    .about__link {
        width: 136px;
        font-size: 14px;
        line-height: 21px;
        background-position: 0 50%;
        padding: 0 5px 0 31px;
        height: 38px;
    }
    .about__link_bg_orang::before,
    .about__link_bg_red::before {
        height: 39px;
        background-size: auto 100%;
        background-repeat: no-repeat;
    }
    .amount__number {
        font-size: 60px;
        line-height: 70px;
    }
}
@media(max-width: 420px) {
    #banner_big .h2 {
        font-size: 30px;
        line-height: 48px;
    }
    #banner_big .h3 {
        font-size: 22px;
        line-height: 26px;
    }
    .about_abs {
        width: 197px;
    }
}
@media(max-width: 404px) {
    .block_submenu__info {
        padding-bottom: 0;
    }
    #wrapper {
        padding-top: 164px;
    }
}
@media (max-width: 382px) {
    #wrapper {
        padding-top: 164px;
    }
    .block_submenu__info {
        padding: 0;
    }
    header .block_submenu .container {
        justify-content: center !important;
        gap: 10px;
    }
    .block_submenu a:not(:last-child) {
        margin-right: 10px;
    }
}

@media(max-width: 1500px) {
    .banner-bot {
        bottom: 52px;
    }
    .banner-book1 {
        left: 200px;
        bottom: -6px;
    }
    .banner-book2 {
        left: 326px;
        top: 14px;
    }
}
@media(max-width: 1350px) {
    .banner-bot {
        bottom: 46px;
    }
    .banner-book1 {
        left: 181px;
        bottom: -5px;
    }
    .banner-book2 {
        left: 359px;
        top: 15px;
    }
}
@media(max-width: 1220px) {
    .banner-bot {
        bottom: 41px;
    }
    .banner-book1 {
        left: 163px;
        bottom: -4px;
    }
    .banner-book2 {
        left: 295px;
        top: 12px;
    }
}
@media(max-width: 1100px) {
    #banner_big {
        background: none;
    }
    #banner_big img.banner-book1 {
        display: block;
        left: 0;
        width: 20.5%;
        bottom: 50%;
        margin-bottom: -145px;
    }
    #banner_big img.banner-book2 {
        display: block;
        width: 16.5%;
        left: 9%;
        top: 50%;
        margin-top: -154px;
    }
}
@media(max-width: 810px) {
    #banner_big img.banner-book1,
    #banner_big img.banner-book2 {
        display: none;
    }
}