@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 54px;
  }

  .hero-copy {
    max-width: 820px;
  }

  .coverage-panel {
    max-width: 860px;
  }

  .about-section {
    grid-template-columns: 1fr;
    gap: 64px;
  }
}

@media (max-width: 820px) {
  .shell,
  .nav-shell {
    width: min(100% - 32px, 1400px);
  }

  .nav-links {
    gap: 16px;
  }

  .nav-links a:nth-child(2) {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-block: 70px 86px;
  }

  .hero h1 {
    font-size: clamp(3rem, 13vw, 5rem);
  }

  .catalog-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .filter-toggle {
    display: flex;
    width: 100%;
    min-height: 66px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: color-mix(in srgb, var(--surface-strong) 94%, var(--accent-soft) 6%);
    padding: 12px 15px 12px 17px;
    cursor: pointer;
    text-align: left;
    transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
  }

  .filter-toggle:hover,
  .filter-toggle[aria-expanded="true"] {
    border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
    background: color-mix(in srgb, var(--surface-strong) 84%, var(--accent-soft) 16%);
  }

  .filter-toggle:active {
    transform: translateY(1px);
  }

  .filter-toggle-copy {
    display: grid;
    gap: 1px;
  }

  .filter-toggle-copy strong {
    font-size: 0.86rem;
    letter-spacing: -0.01em;
  }

  .filter-toggle-copy > span {
    color: var(--text-faint);
    font-size: 0.69rem;
  }

  .filter-toggle-trail {
    display: flex;
    align-items: center;
    gap: 11px;
  }

  .filter-toggle-icon {
    position: relative;
    width: 18px;
    height: 18px;
  }

  .filter-toggle-icon::before,
  .filter-toggle-icon::after {
    position: absolute;
    left: 3px;
    top: 8px;
    width: 12px;
    height: 1.5px;
    border-radius: 2px;
    background: var(--text-soft);
    content: "";
    transition: transform 180ms ease;
  }

  .filter-toggle-icon::after {
    transform: rotate(90deg);
  }

  .filter-toggle[aria-expanded="true"] .filter-toggle-icon::after {
    transform: rotate(0deg);
  }

  .filter-panel {
    display: none;
    position: static;
    max-height: none;
    margin-top: 10px;
    overflow: visible;
  }

  .filter-panel.is-open {
    display: block;
  }

  .filter-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .results-panel {
    margin-top: 26px;
  }

  .dialog-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .paper-item {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .paper-actions {
    grid-column: 2;
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .nav-links a {
    display: none;
  }

  .nav-shell {
    min-height: 64px;
  }

  .hero {
    padding-block: 54px 72px;
  }

  .hero h1 {
    font-size: clamp(2.65rem, 14.5vw, 4.2rem);
    letter-spacing: -0.06em;
  }

  .hero-summary {
    margin-top: 22px;
    font-size: 1rem;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .coverage-panel {
    padding: 22px 18px;
  }

  .coverage-note,
  .coverage-value {
    display: none;
  }

  .coverage-controls {
    gap: 0;
  }

  .coverage-view {
    min-height: 221px;
  }

  .coverage-chart {
    min-height: 210px;
    gap: 4px;
  }

  .coverage-bar-wrap {
    height: 174px;
  }

  .venue-chart {
    min-height: 210px;
    gap: 10px;
    margin-top: 28px;
  }

  .venue-row {
    grid-template-columns: 62px minmax(0, 1fr) 26px;
    gap: 9px;
  }

  .hero-stats div {
    padding: 13px 10px;
  }

  .hero-stats dt {
    font-size: 0.61rem;
  }

  .hero-stats dd {
    font-size: 1rem;
  }

  .catalog-section {
    padding-block: 74px;
  }

  .section-heading h2,
  .about-copy h2 {
    font-size: 2.65rem;
  }

  .search-control input {
    height: 56px;
    font-size: 0.9rem;
  }

  .filter-fields {
    grid-template-columns: 1fr;
  }

  .filter-panel {
    padding: 20px 17px 18px;
  }

  .filter-toggle-copy > span {
    display: none;
  }

  .filter-groups {
    margin-top: 22px;
  }

  .filter-group + .filter-group {
    margin-top: 19px;
    padding-top: 18px;
  }

  .results-toolbar {
    align-items: flex-end;
  }

  .results-actions {
    align-items: stretch;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .sort-control {
    grid-template-columns: 1fr;
  }

  .toolbar-button {
    flex: 1;
  }

  .paper-item {
    grid-template-columns: 1fr;
    gap: 9px;
    padding-block: 24px;
  }

  .paper-index {
    display: flex;
    gap: 7px;
  }

  .paper-index strong {
    display: inline;
  }

  .paper-actions {
    grid-column: 1;
  }

  .pagination {
    grid-template-columns: 1fr auto 1fr;
    gap: 10px;
    margin-top: 22px;
    padding-top: 18px;
  }

  .pagination-pages {
    display: none;
  }

  .pagination-summary {
    display: block;
  }

  .pagination-button--nav {
    min-width: 0;
    padding-inline: 12px;
  }

  .method-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .method-grid div:first-child {
    grid-row: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
    padding: 0 0 34px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
  }

  .dialog-details {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--page);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}