@media only screen and (min-width: 1199px) and (max-width: 1399px) {
  nav .logo img {
    width: 130px;
  }
  .toggle_btn h5 {
    font-size: 14px;
  }
  .right_text_part p {
    font-size: 16px;
  }
  .achievement_left p,
  .achieve_other p {
    font-size: 16px;
  }

  .gallery_box .image_part img {
    height: 180px;
  }
  nav .menu_part ul li a {
    font-size: 14px;
  }
  nav .menu_part ul {
    gap: 20px;
  }
}

@media only screen and (min-width: 992px) and (max-width: 1199px) {
  nav .logo img {
    width: 130px;
  }
  .toggle_btn h5 {
    font-size: 14px;
  }
  nav .menu_part ul li a {
    font-size: 14px;
  }
  .right_text_part p {
    font-size: 14px;
  }
  nav .menu_part ul {
    gap: 15px;
  }
  nav .menu_part ul li a {
    font-size: 14px;
  }

  .ebook_box .title h2 {
    font-size: 14px;
  }
  .activity_img1 {
    height: 300px;
  }
  .title h2 {
    margin-bottom: 15px !important;
  }
  .about_left p {
    font-size: 14px;
  }
  .about_left ul {
    margin-top: 10px !important;
    column-count: 2;
  }
  .about_left ul li {
    padding: 0;
  }
  .achievement_left p,
  .achieve_other p {
    font-size: 14px;
    margin-bottom: 10px !important;
  }

  /* home page */
  .home_book_box .image_part img {
    height: 200px;
  }
  .home_book_box p {
    padding: 10px;
    font-size: 11px;
  }

  .home_text_part p {
    font-size: 16px;
  }
  .home_text_part .title h2 {
    font-size: 24px;
  }

  .contribution_div .contribution_box1 h4 {
    font-size: 20px;
  }

  .gallery_box .image_part img {
    height: 150px;
  }

  .video_section1 .image_part img {
    height: 200px;
  }
}

@media only screen and (max-width: 991px) {
  /* header nav {
    flex-direction: row-reverse;
  } */
  nav .menu_part {
    background-color: #fff;
    position: absolute;
    top: 0;
    bottom: 0;
    left: -100%;
    width: 280px;
    height: 100vh;
    padding: 20px;
    transition: 0.5s all;
    z-index: 9999;
    box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
    overflow-y: scroll;
    padding-bottom: 20px !important;
  }

  .active_menu {
    left: 0 !important;
  }

  nav {
    padding: 10px;
  }

  nav .menu_part ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  nav .menu_part .drop_down {
    opacity: 1;
    visibility: visible;
    position: relative;
    top: 0;
    transition: none;
    display: none;
    box-shadow: none;
    background-color: none;
  }
  .humberger {
    margin-top: 8px;
  }
  .humberger,
  .close_icon {
    display: block;
  }

  .close_icon {
    display: flex;
    justify-content: end;
    margin-bottom: 20px;
  }
  nav .menu_part ul li a {
    color: #000;
    display: flex;
    font-size: 18px;
    justify-content: space-between;
  }
  .menu_part ul li {
    width: 100%;
  }

  .drop_down li {
    padding: 5px 0 !important;
  }

  .footer_part .sec_padding {
    padding-left: 0;
  }
  .responsive_margin {
    margin-top: 30px;
  }
  .footer_part .res_margin {
    margin-top: 30px;
  }
  .footer_top {
    margin-bottom: 30px !important;
  }

  .brif_margin {
    margin-top: 30px;
  }
  .right_text_part .title h2 {
    text-align: center;
    font-weight: bold;
  }
  .same_section {
    margin-top: 50px;
  }

  .about_part .row {
    flex-direction: column-reverse;
  }
  .about_left {
    margin-top: 30px;
  }

  .breadcrumb li {
    font-size: 20px;
  }

  .home_text_part {
    margin-top: 30px;
  }
  .video_section iframe {
    height: 250px;
  }

  .modal-body iframe {
    height: 400px;
  }

  .home_about_2 .row {
    flex-direction: column-reverse !important;
  }
}

@media only screen and (max-width: 767px) {
  .right_text_part p {
    font-size: 14px;
  }
  .ebook_box .title h2 {
    font-size: 16px;
  }
  .activity_img1 {
    height: 300px;
  }
  .about_left p {
    font-size: 14px;
  }
  /* .about_left ul{
    column-count: 2;
  } */

  .contribution_box p {
    font-size: 14px;
  }
  .contribution_box h5 {
    font-size: 16px;
    margin: 25px 0 !important;
  }

  .achievement_left {
    margin-top: 30px;
  }
  .achievement_left p,
  .achieve_other p {
    font-size: 14px;
  }
  .achieve_other {
    margin-top: 10px;
  }

  .breadcrumb li {
    font-size: 16px;
  }
  .home_text_part p {
    font-size: 14px;
  }
  .home_text_part .title h2 {
    font-size: 25px;
  }

  .video_section iframe {
    height: 300px;
  }
  .sub_videos iframe {
    height: 200px;
  }

  .contribution_div .contribution_box1 {
    padding: 15px;
  }
  .contribution_div .contribution_box1 p {
    font-size: 14px;
  }
  .contribution_div .contribution_box1 h4 {
    font-size: 18px;
  }

  .gallery_box p {
    font-size: 14px;
  }
  .gallery_box .image_part img {
    height: 200px;
  }
}

@media only screen and (max-width: 575px) {
  .sec_padding ul {
    column-count: 2;
  }
  .about_left ul {
    column-count: 2;
  }
  .contribution_box .titles h2 {
    font-size: 20px;
  }

  .home_book_box .image_part img {
    height: 220px;
  }

  .video_section1 .image_part img {
    height: 200px;
  }
  .video_section1 .y_icon i {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }

  .gallery_box .image_part img {
    height: 160px;
  }
}

@media only screen and (max-width: 500px) {
  .bio_box h5 {
    font-size: 16px;
  }
  .table span,
  .table p {
    font-size: 14px;
  }
  .contribution_box h5 {
    font-size: 14px;
  }
  .contribution_box ul {
    column-count: 1;
  }
  .contribution_box h6 {
    font-size: 16px;
    margin: 20px 0 !important;
  }

  .home_book_box .image_part img {
    height: 165px;
  }
  .home_book_box p {
    padding: 10px;
    font-size: 11px;
  }

  .home_text_part .title h2 {
    font-size: 20px;
  }
}

@media only screen and (max-width: 450px) {
  .modal-body iframe {
    height: 300px;
  }
  .video_section1 .image_part img {
    height: 170px;
  }
}

@media only screen and (max-width: 425px) {
  nav .menu_part {
    width: 250px;
  }
  nav .logo img {
    width: 130px;
  }

  .activity_img1 {
    height: 230px;
  }
  .ebook_box .title h2 {
    font-size: 13px;
  }

  .video_section iframe {
    height: 250px;
  }

  .sub_videos .col-6 {
    width: 100%;
  }

  .gallery_box .image_part img {
    height: 130px;
  }
}

@media only screen and (max-width: 400px) {
  .e_book_part .col-6 {
    width: 100% !important;
  }
  .activity_img1 {
    height: 400px;
  }
  .ebook_box .title h2 {
    font-size: 15px;
  }
  .about_left ul {
    column-count: 1;
  }
  .contribution_box h6 {
    font-size: 15px;
    margin: 20px 0 !important;
  }

  .video_section1 .col-6 {
    width: 100%;
  }
  .video_section1 .image_part img {
    height: 200px;
  }
}

@media only screen and (max-width: 375px) {
  .home_up_margin .col-6 {
    width: 100%;
  }
  .home_book_box .image_part img {
    height: 260px;
  }

  .gallery_folder .col-6 {
    width: 100%;
  }

  .sub_image .col-6 {
    width: 100%;
  }

  .breadcrumb li {
    font-size: 14px;
  }

  .modal-body iframe {
    height: 200px;
  }

  .gallery_box .image_part img {
    height: 250px;
  }

  .toggle_btn h5 {
    font-size: 12px;
  }
}