@media (max-width: 1060px) {
  .feed-workspace {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .filter-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .header-utility {
    align-items: flex-end;
    flex-direction: column-reverse;
    gap: 7px;
  }

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

  .feed-workspace {
    grid-template-columns: 1fr;
  }

  .source-panel {
    position: static;
    order: -1;
  }

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

  .source-list.is-collapsed .source-item:nth-child(n+7) {
    display: none;
  }
}

@media (max-width: 640px) {
  .source-panel {
    display: none;
  }

  .header-inner,
  .page-shell {
    width: min(100% - 24px, 1240px);
  }

  .header-inner {
    padding-top: 14px;
  }

  .header-bar {
    align-items: flex-start;
    gap: 10px;
  }

  .header-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .header-btn {
    min-height: 34px;
    padding: 6px 9px;
  }

  .header-btn > span:nth-child(2) {
    display: none;
  }

  .back-link {
    min-height: 34px;
    padding: 6px 9px;
  }

  .hero {
    gap: 14px;
    padding: 16px 0 8px;
  }

  .hero-mark {
    width: 58px;
    height: 58px;
    flex-basis: 58px;
  }

  .hero-copy h1 {
    font-size: clamp(28px, 9vw, 38px);
  }

  .hero-copy > p:last-child {
    margin-top: 11px;
    font-size: 14px;
    line-height: 1.6;
  }

  .eyebrow {
    margin-bottom: 6px;
    font-size: 11px;
  }

  .data-meta {
    max-width: 100%;
    border-radius: 10px;
    line-height: 1.45;
  }

  .angle-grid {
    grid-template-columns: 1fr;
  }

  .page-shell {
    padding-top: 22px;
  }

  .metric-grid {
    gap: 9px;
  }

  .metric-card {
    padding: 14px;
  }

  .metric-card strong {
    font-size: 26px;
  }

  .feed-heading,
  .compact-heading {
    align-items: flex-end;
  }

  .section-heading h2 {
    font-size: 21px;
  }

  .secondary-button {
    min-height: 36px;
    padding: 6px 10px;
  }

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

  .reset-button {
    grid-column: 1 / -1;
  }

  .source-list {
    grid-template-columns: 1fr;
  }

  .source-list.is-collapsed .source-item:nth-child(n+4) {
    display: none;
  }

  .topic-card {
    padding: 15px;
  }

  .topic-card-head,
  .topic-card-footer {
    align-items: flex-start;
  }

  .topic-card-footer {
    flex-direction: column;
  }

  .topic-actions {
    width: 100%;
  }

  .topic-actions .card-button {
    flex: 1;
    min-width: calc(50% - 4px);
  }

  .source-badge {
    max-width: 140px;
  }

  .dialog-shell {
    padding: 18px;
  }

  dialog {
    width: calc(100% - 16px);
    max-height: 92vh;
    border-radius: 16px;
  }

  .library-heading {
    flex-direction: column;
    padding-right: 40px;
  }

  .library-item-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .library-item-actions label,
  .library-item-actions select,
  .remove-topic {
    width: 100%;
  }

  .toast {
    right: 12px;
    bottom: 12px;
    max-width: calc(100% - 24px);
  }
}

@media (max-width: 390px) {
  .header-actions {
    gap: 6px;
  }

  .back-link span:last-child {
    display: none;
  }

  .hero-mark {
    display: none;
  }

  .metric-grid {
    grid-template-columns: 1fr 1fr;
  }

  .metric-card > small {
    display: none;
  }

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

  .topic-card-head {
    flex-direction: column;
  }

  .opportunity-score {
    align-self: flex-end;
    margin-top: -34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}