@media (max-width: 980px) {
  :root {
    --mobile-header-offset: 72px;
  }

  html,
  body {
    max-width: 100%;
    overflow-x: hidden;
  }

  body {
    -webkit-text-size-adjust: 100%;
  }

  img,
  svg,
  canvas,
  video,
  iframe {
    max-width: 100%;
    height: auto;
  }

  iframe {
    width: 100%;
  }

  .page,
  .login-page,
  .hero {
    min-height: 100vh;
  }

  .topbar {
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    padding: 10px 14px !important;
    display: flex;
    align-items: center !important;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: nowrap !important;
    position: fixed;
    background: rgba(255,255,255,0.08);
    border-bottom: 1px solid rgba(255,255,255,0.14);
    backdrop-filter: blur(14px) saturate(155%);
    -webkit-backdrop-filter: blur(14px) saturate(155%);
  }

  .brand {
    min-width: 0;
    gap: 8px;
    flex: 1 1 auto;
  }

  .brand__logo {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }

  .brand__text {
    min-width: 0;
  }

  .brand__name,
  .brand__sub,
  .brand__school,
  .brand__subtitle {
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .brand__name {
    font-size: 13px;
  }

  .brand__sub {
    font-size: 10px;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 44px;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 14px;
    background: rgba(255,255,255,0.94);
    color: rgba(27,27,31,0.96);
    box-shadow: 0 12px 26px rgba(0,0,0,0.16);
    cursor: pointer;
    flex: 0 0 auto;
  }

  .mobile-nav-toggle:hover {
    background: rgba(255,255,255,0.98);
  }

  .mobile-nav-toggle__bars,
  .mobile-nav-toggle__bars::before,
  .mobile-nav-toggle__bars::after {
    display: block;
    width: 24px;
    height: 4px;
    border-radius: 999px;
    background: currentColor;
    content: "";
    transition: transform 160ms ease, opacity 160ms ease;
  }

  .mobile-nav-toggle__bars::before {
    transform: translateY(-8px);
  }

  .mobile-nav-toggle__bars::after {
    transform: translateY(4px);
  }

  .topbar.is-nav-open .mobile-nav-toggle__bars {
    transform: rotate(45deg);
  }

  .topbar.is-nav-open .mobile-nav-toggle__bars::before {
    transform: translateY(0);
    opacity: 0;
  }

  .topbar.is-nav-open .mobile-nav-toggle__bars::after {
    transform: translateY(-4px) rotate(-90deg);
  }

  .nav {
    display: none !important;
    position: absolute;
    top: calc(100% + 8px);
    right: 12px;
    width: min(220px, calc(100vw - 24px));
    max-height: calc(100vh - var(--mobile-header-offset) - 20px);
    overflow: auto;
    margin-top: 0;
    padding: 10px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.16);
    background: rgba(20,20,24,0.78);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    box-shadow: 0 18px 44px rgba(0,0,0,0.16);
    grid-template-columns: 1fr;
    gap: 8px;
    order: 3;
  }

  .topbar.is-nav-open {
    flex-wrap: nowrap !important;
    align-items: center !important;
  }

  .topbar.is-nav-open .nav {
    display: grid !important;
  }

  .nav__link,
  .login-btn {
    margin-left: 0 !important;
    min-height: 42px;
    width: 100%;
    padding: 10px 12px !important;
    border-radius: 12px !important;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.08);
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    font-size: 14px;
    line-height: 1.15;
    box-shadow: none;
  }

  .nav__link::after {
    display: none !important;
  }

  .login-btn {
    color: #111;
    background: var(--brand-yellow);
  }

  .wrap,
  .hero__content {
    padding-top: 72px !important;
  }

  .wrap {
    padding-right: 12px !important;
    padding-left: 12px !important;
    padding-bottom: 40px !important;
  }

  .hero__content {
    display: flex !important;
    align-items: flex-start !important;
    justify-content: center;
    min-height: auto !important;
    padding-bottom: 48px !important;
  }

  .hero__center {
    width: min(100%, 94vw);
    padding-top: 28px;
  }

  .hero__title {
    margin: 0 0 24px;
    font-size: clamp(28px, 7vw, 42px);
  }

  .search {
    width: min(100%, 94vw);
  }

  .search__bar {
    grid-template-columns: 44px 1fr;
    row-gap: 10px;
    border-radius: 24px;
    padding: 12px;
  }

  .search__bar input {
    min-width: 0;
    font-size: 16px;
    padding: 10px 8px;
  }

  #searchBtn {
    grid-column: 1 / -1;
    width: 100%;
    min-height: 46px;
  }

  .shell {
    width: min(100%, 94vw) !important;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    align-items: start !important;
  }

  .shell > .panel,
  .shell > section.panel {
    order: 2;
  }

  .shell > .sidebar,
  .shell > aside.sidebar {
    order: 1;
  }

  .sidebar {
    position: sticky !important;
    left: auto;
    right: auto;
    bottom: auto;
    top: var(--mobile-header-offset) !important;
    z-index: 25;
    width: 100% !important;
    max-width: none !important;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(56px, 1fr);
    align-items: stretch;
    overflow-x: auto;
    overflow-y: hidden;
    border-radius: 16px;
    padding: 0;
    scrollbar-width: none;
    margin-bottom: 6px;
  }

  .sidebar::-webkit-scrollbar {
    display: none;
  }

  .side-item {
    min-width: 56px;
    height: 58px !important;
    border-bottom: 0 !important;
    border-right: 1px solid rgba(255,255,255,0.10);
  }

  .side-item:last-child {
    border-right: 0;
  }

  .side-item.is-active {
    border-left: 0 !important;
    box-shadow: inset 0 -3px 0 var(--brand-yellow) !important;
  }

  .side-item img {
    width: 24px !important;
    height: 24px !important;
  }

  .panel {
    width: 100%;
    min-width: 0;
    height: auto !important;
    min-height: 0;
  }

  .content {
    padding: 14px !important;
    overflow: visible !important;
  }

  .titleRow {
    align-items: flex-start !important;
  }

  .titleRow h1,
  h1 {
    font-size: clamp(22px, 5vw, 28px) !important;
  }

  .tools,
  .grid,
  .grid2,
  .formGrid,
  .detailsGrid,
  .editorGrid,
  .previewGrid,
  .isbnRow,
  .modalFieldGrid,
  .cards {
    grid-template-columns: 1fr !important;
  }

  .card,
  .cardBody,
  .cardHead,
  .cardTitle,
  .result-card {
    min-width: 0;
  }

  .right {
    min-width: 0 !important;
  }

  .cardHead,
  .previewActions,
  .modalActions,
  .actions,
  .actionsLeft,
  .actionsRight,
  .listFooter,
  .pagination {
    gap: 10px !important;
  }

  .actions,
  .previewActions,
  .modalActions,
  .listFooter {
    flex-direction: column;
    align-items: stretch !important;
    justify-content: flex-start !important;
  }

  .actionsLeft,
  .actionsRight {
    width: 100%;
    justify-content: stretch !important;
  }

  .btn,
  .btnGhost,
  .btnDanger,
  .btn-ghost,
  .pageBtn,
  button,
  [type="button"],
  [type="submit"] {
    min-height: 44px;
  }

  input,
  select,
  textarea {
    font-size: 16px !important;
  }

  .searchWrap,
  .sortBlock select,
  .filterBlock select,
  .copiesBox,
  .field input,
  .field select,
  .field textarea,
  .input {
    min-width: 0;
    width: 100%;
  }

  .list,
  .results {
    padding-right: 0 !important;
  }

  .tabs {
    flex-wrap: nowrap !important;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .tab {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .modalOverlay,
  .confirmOverlay,
  .restoreOverlay,
  .saveResultOverlay,
  .modal {
    padding: 12px !important;
  }

  .modal,
  .confirmModal,
  .restoreModal,
  .actionModal,
  .saveResultModal,
  .modal__card {
    width: min(100%, 96vw) !important;
    max-width: 96vw !important;
    max-height: calc(100vh - 24px) !important;
  }

  .modalBody,
  .confirmBody,
  .restoreBody,
  .modal__body {
    overflow: auto;
    max-height: calc(100vh - 190px);
  }

  .toast {
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-width: none;
  }

  .site-footer__inner {
    gap: 24px;
  }

  .site-footer__row {
    flex-wrap: wrap;
  }

  .login-page .wrap {
    display: block !important;
    min-height: 0 !important;
    padding-top: 64px !important;
    padding-bottom: 24px !important;
  }

  .login-page .card {
    width: min(100%, 92vw);
    margin: 0 auto;
  }

  .login-page .input-wrap {
    position: relative;
  }

  .login-page .input {
    min-height: 52px;
    padding-top: 14px;
    padding-bottom: 14px;
    padding-left: 14px;
    padding-right: 50px;
    line-height: 1.2;
  }

  .login-page .toggle {
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .login-page .toggle svg {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --mobile-header-offset: 68px;
  }

  .wrap,
  .hero__content {
    padding-top: 66px !important;
  }

  .wrap {
    padding-bottom: 34px !important;
  }

  .panel {
    border-radius: 16px;
  }

  .content {
    padding: 12px !important;
  }

  .tools {
    gap: 10px !important;
  }

  .copiesBox {
    height: auto !important;
    align-items: stretch !important;
    flex-direction: column;
  }

  .result-card {
    grid-template-columns: 44px 1fr;
    gap: 10px;
    padding: 10px 12px;
  }

  .result-cover {
    width: 44px;
    height: 60px;
  }

  .book-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 12px !important;
  }

  .listFooter,
  .pagination {
    align-items: stretch !important;
  }

  .pageStatus {
    min-width: 0 !important;
    width: 100%;
    text-align: left !important;
  }

  table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    border-collapse: collapse;
  }

  table thead,
  table tbody,
  table tr {
    width: max-content;
    min-width: 100%;
  }

  .login-page .title {
    font-size: 30px !important;
  }

  .login-page .brand-copy .brand__name {
    font-size: 15px;
  }

  .login-page .brand-copy .brand__sub {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  :root {
    --mobile-header-offset: 62px;
  }

  .topbar {
    padding: 8px 10px !important;
  }

  .brand__logo {
    width: 36px;
    height: 36px;
    flex-basis: 36px;
  }

  .brand__name {
    font-size: 12px;
  }

  .brand__sub {
    font-size: 9px;
  }

  .mobile-nav-toggle {
    width: 48px;
    height: 40px;
    border-radius: 12px;
  }

  .wrap,
  .hero__content {
    padding-top: 60px !important;
  }

  .wrap {
    padding-right: 10px !important;
    padding-left: 10px !important;
    padding-bottom: 28px !important;
  }

  .hero__center {
    padding-top: 18px;
  }

  .content {
    padding: 12px !important;
  }

  .sidebar {
    left: auto;
    right: auto;
    bottom: auto;
    top: var(--mobile-header-offset) !important;
    border-radius: 14px;
  }

  .side-item {
    min-width: 54px;
    height: 56px !important;
  }

  .side-item img {
    width: 22px !important;
    height: 22px !important;
  }

  .titleRow h1,
  h1 {
    font-size: 22px !important;
  }

  .tab {
    padding: 10px 14px !important;
    font-size: 12px !important;
  }

  .btn,
  .btnGhost,
  .btnDanger,
  .btn-ghost,
  .pageBtn,
  #searchBtn,
  .login-btn {
    width: 100%;
  }

  .modalTop,
  .confirmTop,
  .restoreTop,
  .modal__top {
    padding: 14px 14px 10px !important;
  }

  .modalBody,
  .confirmBody,
  .restoreBody,
  .modal__body {
    padding: 12px 14px !important;
  }

  .modalActions,
  .confirmActions,
  .restoreActions,
  .modal__actions {
    padding: 10px 14px 14px !important;
  }

  .login-page .wrap {
    padding-top: 56px !important;
    padding-left: 12px !important;
    padding-right: 12px !important;
  }

  .login-page .card {
    width: 100%;
    border-radius: 22px;
    padding: 22px 18px 20px;
  }

  .login-page .input {
    min-height: 50px;
    padding-right: 46px;
  }

  .login-page .btn {
    width: 100%;
  }

  .site-footer__inner {
    padding: 24px 16px !important;
  }
}