@media (max-width: 1280px) {
  :root { --sidebar-width: 166px; }
  .dashboard-content { width: min(calc(100% - 56px), 1180px); }
  .dashboard-header { padding-inline: 28px; }
  .metric-grid { grid-template-columns: repeat(4, minmax(115px, 1fr)) minmax(205px, 1.5fr); }
  .metric-card { padding-inline: 14px; }
  .chart-bars { gap: 7px; }
  .explore-layout { grid-template-columns: minmax(0, 1fr) 238px; gap: 24px; }
  .results-table-head,
  .opportunity-row { grid-template-columns: minmax(0, 1fr) 200px; gap: 10px; }
  .filter-sidebar { padding-left: 18px; }
}

@media (max-width: 1040px) {
  .overview-heading h1 { font-size: clamp(38px, 4.8vw, 52px); }
  .overview-meta { min-width: 170px; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-chart-card { grid-column: span 2; }
  .insight-strip { grid-template-columns: repeat(2, 1fr); }
  .insight-item:nth-child(2) { border-right: 0; }
  .insight-item:nth-child(n + 3) { border-top: 1px solid var(--border); }
  .explore-header { align-items: flex-start; flex-direction: column; }
  .explore-header-actions { width: 100%; }
  .result-search { width: min(100%, 420px); }
}

@media (max-width: 860px) {
  :root { --header-height: 64px; }
  .app-sidebar { display: none; }
  .dashboard-main { margin-left: 0; }
  .dashboard-content { width: min(calc(100% - 40px), 760px); }
  .dashboard-header { padding-inline: 20px; }
  .header-context { display: none; }
  .mobile-header-brand { display: flex; align-items: center; gap: 8px; color: var(--ink); font: 700 13px/1 var(--font-display); letter-spacing: -.04em; }
  .mobile-brand-mark { color: var(--blue); font: 700 25px/.8 var(--font-display); letter-spacing: -.08em; }
  .mobile-menu-button { display: grid; width: 42px; height: 42px; place-content: center; gap: 4px; padding: 10px; border: 1px solid var(--border); border-radius: 7px; background: #fff; }
  .mobile-menu-button span { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--ink); }
  .mobile-nav { position: absolute; top: 100%; left: 0; right: 0; z-index: 48; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 18px; padding: 10px 20px 14px; border-bottom: 1px solid var(--border); background: #fff; box-shadow: 0 14px 28px rgba(15,23,42,.08); }
  .mobile-nav a, .mobile-nav button { min-height: 44px; padding: 10px 0; border: 0; border-bottom: 1px solid var(--border); background: transparent; color: var(--ink-2); text-align: left; font-size: 13px; font-weight: 700; text-decoration: none; }
  .overview-heading { align-items: flex-start; flex-direction: column; gap: 26px; }
  .overview-meta { min-width: 0; padding-left: 0; border-left: 0; }
  .overview-description { max-width: 600px; }
  .explore-layout { grid-template-columns: 1fr; }
  .filter-sidebar { display: none; }
  .results-table-head { grid-template-columns: minmax(0, 1fr) 180px; }
  .opportunity-row { grid-template-columns: minmax(0, 1fr) 180px; }
  .mobile-filter-fab { position: fixed; right: max(18px, env(safe-area-inset-right)); bottom: max(18px, env(safe-area-inset-bottom)); z-index: 70; display: inline-flex; min-height: 48px; align-items: center; gap: 8px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--ink); box-shadow: 0 14px 30px rgba(15,23,42,.2); color: #fff; font-size: 12px; font-weight: 800; touch-action: manipulation; }
  .mobile-filter-fab svg { width: 18px; height: 18px; }
  .mobile-filter-fab span { display: inline-grid; min-width: 18px; height: 18px; place-items: center; border-radius: 50%; background: var(--lime); color: var(--ink); font-size: 10px; }
}

@media (max-width: 640px) {
  .dashboard-content { width: min(calc(100% - 28px), 560px); }
  .dashboard-header { padding-inline: 14px; }
  .header-status { display: none; }
  .header-actions { gap: 10px; }
  .overview-heading { padding: 32px 0 26px; }
  .overview-heading h1 { font-size: clamp(34px, 10vw, 47px); line-height: 1.08; }
  .overview-description { margin-top: 14px; font-size: 14px; }
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .metric-card { min-height: 112px; padding: 15px 13px 13px; }
  .metric-value { font-size: 27px; }
  .metric-chart-card { grid-column: 1 / -1; }
  .chart-bars { gap: 8px; }
  .insight-strip { grid-template-columns: 1fr; margin-top: 20px; }
  .insight-item,
  .insight-item:nth-child(n + 3) { border-right: 0; border-top: 1px solid var(--border); }
  .insight-item:first-child { border-top: 0; }
  .explore-section { padding: 30px 0 58px; }
  .explore-header h2 { font-size: 28px; }
  .explore-header-actions { align-items: stretch; flex-direction: column; }
  .result-search { width: 100%; }
  .sort-control { width: 100%; justify-content: space-between; }
  .sort-control select { flex: 1; }
  .results-table-head { display: none; }
  .opportunity-row { grid-template-columns: minmax(0, 1fr) 155px; gap: 10px; min-height: 0; padding: 18px 0; }
  .opportunity-side { grid-template-columns: 64px minmax(0, 1fr); padding-left: 12px; }
  .opportunity-main h3 { font-size: 15px; }
  .organizer { font-size: 10px; }
  .row-insight { display: none; }
  .tag-row { max-width: 100%; }
  .tag { font-size: 9px; }
  .dataset-strip { gap: 7px; padding: 8px 0; }
  .sources-grid { grid-template-columns: 1fr; gap: 12px; }
  .sources-grid > p { font-size: 12px; }
  .source-tags { grid-column: auto; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-wrap: wrap; }
  .opportunity-dialog { width: calc(100vw - 20px); max-height: 90vh; }
  .dialog-shell { padding: 26px 20px; }
  .dialog-shell h2 { font-size: 27px; }
  .dialog-summary-grid { grid-template-columns: 1fr; }
  .dialog-summary-grid > div + div { border-top: 1px solid var(--border); border-left: 0; }
  .dialog-columns { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 430px) {
  .mobile-header-brand strong { font-size: 12px; }
  .avatar { width: 28px; height: 28px; font-size: 10px; }
  .overview-heading h1 { font-size: 34px; }
  .metric-grid { gap: 7px; }
  .metric-label { font-size: 11px; }
  .metric-value { font-size: 24px; }
  .metric-note { font-size: 10px; }
  .opportunity-row { grid-template-columns: minmax(0, 1fr) 132px; }
  .opportunity-side { grid-template-columns: 54px minmax(0, 1fr); gap: 6px 8px; }
  .dday { font-size: 15px; }
}