@media (max-width: 1199px) {
  .body__wrapper {
    overflow: hidden;
    width: 100%;
    position: relative;
  }

  /* header */

  .header__logo {
    z-index: 2;
  }

  .header__btn {
    padding: 18px 90px;
  }

  .header__btn-burger {
    position: relative;
    display: block;
    z-index: 2;
    width: 40px;
    height: 40px;
    background-color: transparent;
    border: none;
    outline: none;
    cursor: pointer;
  }

  .header__btn-burger span {
    display: block;
    position: absolute;
    width: 30px;
    height: 3px;
    left: 5px;
    background-color: var(--color-black);
    transition: background-color .3s, opacity .3s, transform .5s;
    will-change: transform;
  }

  .header__btn-burger:hover span {
    background-color: rgb(103, 103, 103);
  }

  .header__btn-burger span:nth-child(1) {
    transform: translateY(-10px);
  }

  .header__btn-burger span:nth-child(3) {
    transform: translateY(10px);
  }

  .header.open .header__btn-burger span:nth-child(1) {
    transform: translateY(0) rotate(45deg);
  }

  .header.open .header__btn-burger span:nth-child(2) {
    opacity: 0;
  }

  .header.open .header__btn-burger span:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
  }

  .header.open .header__nav {
    transform: translateX(-100%);
    visibility: visible;
  }

  .header__nav {
    position: absolute;
    right: -60%;
    top: 0;
    z-index: 2;
    width: 60%;
    padding: 90px 20px 20px 75px;
    background-color: var(--color-beige);
    border-bottom-left-radius: 20px;
    visibility: hidden;
    transition: transform .5s, visibility .5s;
    will-change: transform;
  }

  .header__nav-list-item-text {
    font-size: 21px;
    display: block;
    padding: 10px;
  }

  .header.open .header__nav {
    transform: translateX(-100%);
    visibility: visible;
  }

  .nav__list {
    display: flex;
    flex-direction: column;
    list-style-type: none;
    padding: 0;
    margin: 0;
  }

  .nav__item {
    margin-right: 0;
    margin-bottom: 20px;
    font-size: 20px;
  }

  .nav__item:nth-last-child(2) {
    margin-bottom: 60px;
  }

  .nav__link {
    display: inline-block;
  }

  .nav__btn {
    display: block;
  }

  .nav__link-btn {
    display: block;
    text-align: center;
    padding: 20px 50px 20px 50px;
    max-width: 50%;
    background-color: var(--color-red);
    border-radius: 10px;
    color: var(--color-white);
    font-weight: 500;
    font-size: 18px;
    line-height: 21px;
    transition: background-color .3s ease-in-out;
  }

  .nav__link-btn:focus {
    background-color: var(--color-red);
  }

  .nav__link-btn:hover {
    background-color: var(--color-black);
  }

  .nav__link-btn:active {
    background-color: var(--color-grey);
  }

  /* hero */

  .hero {
    margin-bottom: 100px;
  }

  .hero__container {
    min-height: 48vh;
  }

  .hero__wrapper-content {
    padding-right: 15px;
    padding-left: 15px;
  }

  /* about */

  .about {
    margin-bottom: 100px;
  }

  .about__tittle {
    margin-bottom: 60px;
  }

  .about__text {
    margin-bottom: 60px;
  }

  .list-content__item {
    padding-right: 15px;
    padding-left: 15px;
  }

  .list-content__item:nth-last-child(1) {
    margin-bottom: 0;
  }

  .list-content__item::after {
    left: 15px;
  }

  /* focus */

  .focus {
    margin-bottom: 100px;
  }

  .wrapper-left__h3 {
    margin-bottom: 10px;
  }

  .wrapper-left__item {
    margin-bottom: 10px;
  }

  /* materials */

  .materials {
    margin-bottom: 100px;
  }

  .materials__tittle-h3 {
    margin-bottom: 60px;
  }

  .materials__content-right {
    padding-top: 0;
  }

  /* participate */

  .participate {
    margin-bottom: 100px;
  }

  .participate__tittle-h3 {
    margin-bottom: 60px;
  }

  /* dates */

  .dates {
    margin-bottom: 100px;
  }

  .dates__tittle-h3 {
    margin-bottom: 60px;
  }

  /* school */

  .school__container {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .school__content::before {
    top: 0;
  }

  .school__content {
    margin-bottom: 100px;
    min-height: 49vh;
  }

  /* authors */

  .authors {
    padding-top: 100px;
    margin-bottom: 100px;
  }

  .authors__tittle {
    margin-bottom: 60px;
  }

  /* form */

  .form__container {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .form__tittle {
    margin-bottom: 60px;
  }

  /* footer */

  .footer__container {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .footer__item {
    margin-right: 25px;
  }
}

@media (max-width: 991px) {

  /* header */

  .nav__link-btn {
    max-width: 53%;
  }

  /* hero */

  .hero__wrapper-content::before {
    background-position: center;
  }

  .wrapper-content__tittle {
    font-size: 45px;
  }

  .wrapper-content__text {
    font-size: 15.5px;
  }

  /* about */

  .about__text {
    max-width: 95%;
  }

  .list-content__tittle {
    font-size: 15.4px;
  }

  .list-content__text {
    font-size: 15px;
  }

  /* focus */

  .wrapper-left__item {
    margin-bottom: 0;
  }

  .wrapper-left__h3 {
    max-width: 100%;
    font-size: 27px;
  }

  .wrapper-left__h4 {
    max-width: 100%;
    font-size: 16px;
  }

  .wrapper-right__list {
    padding-top: 51px;
  }

  /* materials */

  .materials__content-left {
    display: flex;
    align-items: center;
  }

  .content-right__item {
    padding-left: 40px;
  }

  .content-right__tittle-h4 {
    font-size: 15.7px;
  }

  /* dates */

  .wrapper-content__item:nth-child(1) {
    padding-top: 153px;
  }

  .wrapper-content__item:nth-child(3) {
    padding-top: 153px;
  }

  .list__tittle-h5 {
    font-size: 14.3px;
  }

  .wrapper-content__txt {
    font-size: 15.2px;
  }

  .wrapper-content__tittle-h4 {
    margin-bottom: 5px;
    font-size: 15.3px;
  }

  .dates__container .dates__wrapper-content .wrapper-content__item .wrapper-content__txt:nth-child(2) {
    margin-bottom: 19px;
  }

  /* school */

  .school__tittle {
    font-size: 36px;
  }

  .school__text {
    font-size: 16px;
  }

  .school__content::before {
    background-position: bottom;
  }

  .school__number {
    font-size: 52px;
  }

  .school__tittle-h6 {
    font-size: 18px;
  }

  .school__text-bottom {
    font-size: 15px;
  }

  /* form */

  .form__list {
    margin-bottom: 50px;
  }

  .form__item-text {
    font-size: 15px;
  }

  .form__text {
    font-size: 14px;
  }

  .form__txt {
    margin-bottom: 30px;
    font-size: 27px;
  }

  /* footer */

  .footer__nav {
    display: none;
  }
}

@media (max-width: 767px) {

  .header__container {
    padding-top: 15px;
    padding-bottom: 15px;
  }

  .header__logo {
    position: relative;
  }

  .header__logo::before {
    content: "";
    position: absolute;
    top: -10px;
    right: -10px;
    bottom: -10px;
    left: -10px;
  }

  .header__nav {
    right: -100%;
    padding: 30px 20px 20px 131px;
    width: 100%;
  }

  .header__logo-nav {
    display: block;
    margin-bottom: 72px;
    width: 150px;
    height: 30px;
  }

  .nav__item {
    margin-bottom: 40px;
  }

  .nav__item:nth-last-child(2) {
    margin-bottom: 226px;
  }

  .header__btn-burger {
    position: relative;
  }

  .header__btn-burger::after {
    content: "";
    position: absolute;
    top: -10px;
    right: -10px;
    bottom: -10px;
    left: -10px;
  }

  /* hero */

  .hero {
    margin-bottom: 50px;
  }

  .hero__container {
    padding-top: 30px;
    padding-bottom: 30px;
  }

  .hero__wrapper-content {
    padding-top: 480px;
  }

  .hero__wrapper-content::before {
    max-width: 400px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -93%);
  }

  .wrapper-content__span {
    margin-bottom: 20px;
    font-size: 12px;
    line-height: 150%;
  }

  /* about */

  .about {
    margin-bottom: 50px;
  }

  .about__tittle {
    margin-bottom: 25px;
  }

  .about__text {
    margin-bottom: 25px;
    max-width: 100%;
    font-size: 16px;
    line-height: 150%;
  }

  .list-content__item {
    margin-bottom: 25px;
    padding-top: 100px;
    min-height: 139px;
  }

  .list-content__item::after {
    width: 80px;
    height: 80px;
    background-size: contain;
  }

  /* focus */

  .focus {
    margin-bottom: 50px;
  }

  .focus__wrapper-left {
    padding-left: 15px;
  }

  .focus__wrapper-right {
    display: none;
  }

  /* materials */

  .materials {
    margin-bottom: 50px;
  }

  .materials__tittle-h3 {
    margin-bottom: 25px;
    padding-right: 0;
  }

  .materials__content-left {
    margin-bottom: 25px;
  }

  .content-right__item {
    margin-bottom: 0;
  }

  /* participate */

  .participate {
    margin-bottom: 50px;
  }

  .participate__tittle-h3 {
    margin-bottom: 25px;
  }

  /* dates */

  .dates {
    margin-bottom: 50px;
  }

  .dates__tittle-h3 {
    margin-bottom: 25px;
  }

  .wrapper-content__item {
    margin-bottom: 25px;
    padding-right: 15px;
    padding-left: 15px;
    min-height: 10vh;
  }

  .wrapper-content__item:nth-child(1) {
    padding-top: 0;
  }

  .wrapper-content__item:nth-child(2) {
    display: flex;
    flex-direction: column-reverse;
    padding-top: 0;
  }

  .wrapper-content__item:nth-child(3) {
    padding-top: 0;
  }

  .wrapper-content__item:nth-child(4) {
    display: flex;
    flex-direction: column-reverse;
    margin-bottom: 0;
    padding-top: 0;
  }

  .wrapper-content__block {
    margin-bottom: 10px;
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .wrapper-content__txt {
    margin-bottom: 0;
  }

  .wrapper-content__txt {
    margin-bottom: 0;
  }

  /* school */

  .school__container {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .school__tittle {
    margin-bottom: 470px;
  }

  .school__content {
    margin-bottom: 50px;
  }

  .school__content::before {
    top: 65px;
    left: 15px;
    width: 94%;
    height: 439px;
    background-image: url(../img/768-mobile/school.jpg);
    background-size: cover;
  }

  .school__tittle-h3 {
    margin-bottom: 25px;
  }

  .school__number {
    margin-bottom: 5px;
  }

  .school__tittle-h6 {
    margin-bottom: 5px;
  }

  .school__text-bottom {
    margin-bottom: 0;
  }

  .school__content-bottom {
    margin-bottom: 25px;
  }

  .school__content-bottom:nth-last-child(1) {
    margin-bottom: 0;
  }

  /* authors */

  .authors {
    margin-bottom: 50px;
    padding-top: 50px;
  }

  .authors__tittle {
    margin-bottom: 30px;
  }

  .authors__swiper-slide {
    display: flex;
    flex-direction: column;
    align-items: center
  }

  .swiper-slide__img {
    width: 170px;
  }

  .swiper-slide__text {
    margin-bottom: 40px;
    text-align: center;
  }

  /* form */

  .form__container {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .form__tittle {
    margin-bottom: 25px;
  }

  .form__content-left {
    margin-bottom: 50px;
  }

  .form__list {
    margin-bottom: 25px;
  }

  .form__number {
    margin-bottom: 25px;
  }

  .form__text {
    margin-bottom: 20px;
  }

  .form__text:nth-last-child(1) {
    margin-bottom: 0;
  }

  .form__txt {
    margin-bottom: 25px;
  }

  /* footer */

  .footer__container {
    padding-top: 50px;
    padding-bottom: 50px;
  }
}

@media (max-width: 575px) {

  /* header  */

  .header__container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .header__btn {
    padding: 14px 35px;
    font-size: 14px;
    line-height: 16px;
  }

  .header__nav {
    padding: 22px 20px 20px 20px;
  }

  .nav__item {
    margin-bottom: 50px;
  }

  .nav__link-btn {
    max-width: 100%;
    padding: 0;
    padding-top: 15px;
    padding-bottom: 15px;
  }

  /* hero */

  .hero__container {
    padding-bottom: 50px;
  }

  .hero__wrapper-content {
    padding-top: 350px;
  }

  .hero__wrapper-content::before {
    max-width: 320px;
    height: 320px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -90%);
  }

  .wrapper-content__span:nth-child(1) {
    margin-bottom: 20px;
  }

  .wrapper-content__span:nth-last-child(1) {
    margin-bottom: 0;
  }

  .wrapper-content__tittle {
    margin-bottom: 20px;
    font-size: 36px;
    line-height: 110%;
  }

  .wrapper-content__text {
    margin-bottom: 20px;
    line-height: 150%;
  }

  /* about */

  .about__tittle {
    font-size: 32px;
    line-height: 150%;
  }

  /* focus */

  .wrapper-left__h3 {
    font-size: 24px;
    line-height: 150%;
  }

  .wrapper-left__h4 {
    line-height: 150%;
  }

  /* materials */

  .materials__tittle-h3 {
    font-size: 24px;
  }

  .content-right__tittle-h4 {
    line-height: 150%;
  }

  /* dates */

  .dates__tittle-h3 {
    font-size: 24px;
  }

  .wrapper-content__block {
    padding-top: 16px;
    padding-bottom: 16px;
    font-size: 16px;
  }

  /* school */

  .school__tittle {
    margin-bottom: 485px;
    font-size: 32px;
  }

  .school__text {
    line-height: 150%;
  }

  .school__tittle-h3 {
    font-size: 24px;
  }

  .school__number {
    font-size: 40px;
    line-height: 110%;
  }

  .school__text-bottom text {
    font-size: 14px;
    line-height: 150%;
  }

  /* authors */

  .authors__tittle {
    font-size: 32px;
  }

  .swiper-slide__tittle-h3 {
    text-align: center;
    margin-bottom: 5px;
    font-size: 18px;
    line-height: 150%;
  }

  .swiper-slide__text {
    line-height: 150%;
  }

  /* form */

  .form__tittle {
    font-size: 32px;
  }

  .form__item-text {
    max-width: 100%;
    line-height: 150%;
  }

  .form__number {
    display: flex;
    justify-content: center;
    font-size: 24px;
    line-height: 150%;
  }

  .form__text {
    font-size: 16px;
    line-height: 150%;
  }

  .form__txt {
    font-size: 24px;
    line-height: 150%;
  }

  .form__input {
    padding-left: 15px;
    font-size: 14px;
  }

  .form__btn {
    padding-top: 16px;
    padding-bottom: 16px;
    font-size: 16px;
    line-height: 19px;
  }

  /* footer */

  .footer__top {
    display: flex;
    flex-direction: column;
    margin-bottom: 25px;
  }

  .footer__logo {
    margin-bottom: 25px;
  }

  .footer__number {
    font-size: 20px;
    line-height: 23px;
  }

}

@media (max-width: 470px) {

  .school__tittle {
    margin-bottom: 370px
  }

  .school__content::before {
    height: 320px;
  }
}

@media (max-width: 324px) {
  .school__tittle {
    font-size: 30px;
  }
}