@media (max-width: 1080px) {
  .dashboard-grid, .detail-grid, .settings-grid {
    grid-template-columns: 1fr;
  }
  .kpi-row, .stat-chip-row { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: 1fr; }
  .chart-panel-wide { grid-column: auto; }
}

@media (max-width: 900px) {
  .sidebar { display: none; }

  .app-shell { flex-direction: column; }

  .bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: color-mix(in srgb, var(--bg-elev) 96%, transparent);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    padding: 0.4rem calc(0.3rem + env(safe-area-inset-right)) calc(0.4rem + env(safe-area-inset-bottom)) calc(0.3rem + env(safe-area-inset-left));
    z-index: 30;
  }
  .bottom-nav .nav-item {
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.5rem 0.5rem;
    min-height: 48px;
    font-size: 0.65rem;
    flex: 1;
    text-align: center;
    border-radius: var(--radius-sm);
    transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), transform 0.15s var(--ease-spring);
  }
  .bottom-nav .nav-item:active { transform: scale(0.9); background: var(--bg-hover); }
  .bottom-nav .nav-icon { font-size: 1.35rem; }
  .bottom-nav .nav-item.active {
    background: transparent;
    color: var(--accent);
    box-shadow: none;
    transform: translateY(-2px) scale(1.05);
  }

  .main-topbar {
    padding: calc(0.75rem + env(safe-area-inset-top)) 1rem 0.75rem;
    gap: 0.6rem;
  }
  .main-topbar h1 { display: none; }
  .topbar-search { flex: 1 1 auto; max-width: none; }
  .topbar-search input { min-height: 42px; }

  .add-menu { display: none; }

  .fab {
    display: grid;
    place-items: center;
    bottom: calc(4.75rem + env(safe-area-inset-bottom));
    right: calc(1.1rem + env(safe-area-inset-right));
  }

  .add-menu-dropdown {
    position: fixed;
    top: auto;
    left: calc(0.75rem + env(safe-area-inset-left));
    right: calc(0.75rem + env(safe-area-inset-right));
    bottom: calc(4.75rem + env(safe-area-inset-bottom) + 4rem);
    min-width: 0;
    animation: sheetUp 0.22s var(--ease-out);
  }
  .add-menu-dropdown button { padding: 0.9rem 0.8rem; font-size: 0.94rem; min-height: 48px; }

  .view-root {
    padding: 1.1rem 1rem calc(5.5rem + env(safe-area-inset-bottom));
  }

  .sync-badge { display: none; }

  .hero-banner { padding: 1.5rem 1.4rem; border-radius: var(--radius-lg); }
  .hero-greeting { font-size: 1.25rem; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1 1 auto; min-height: 46px; }

  .demo-showcase { padding: 1.15rem 1.25rem; border-radius: var(--radius-lg); }
  .demo-icon-wrap { width: 3rem; height: 3rem; font-size: 1.5rem; }
  .demo-title { font-size: 1rem; }
  .demo-sub { font-size: 0.8rem; }
  .demo-cta { width: 100%; justify-content: center; min-height: 44px; }

  .kpi-row { grid-template-columns: repeat(2, 1fr); gap: 0.7rem; }
  .kpi-card { padding: 0.9rem 1rem 0.5rem; }
  .kpi-value { font-size: 1.4rem; }
  .stat-chip-row { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }

  .gauges-row { grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
  .gauge-box { height: 108px; }
  .gauge-title { font-size: 0.72rem; }

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

  .view-toolbar { flex-direction: column; align-items: stretch; }
  .view-toolbar select, .search-wrap { width: 100%; flex: none; }
  .view-toolbar select { min-height: 44px; }

  .lead-form, .stacked-form { grid-template-columns: 1fr; }
  .modal { width: 94vw; padding: 1.25rem; max-height: calc(100vh - 2rem - env(safe-area-inset-bottom)); }
  .modal-close { width: 2.25rem; height: 2.25rem; display: grid; place-items: center; }

  .detail-header { flex-direction: column; align-items: stretch; }
  .detail-actions { justify-content: flex-end; }
  .detail-actions .btn { min-height: 44px; }

  .kanban-column { flex: 0 0 82vw; width: 82vw; }
  .kc-move-btn { width: 2rem; height: 2rem; font-size: 1.05rem; }
  .kc-action { width: 2.1rem; height: 2.1rem; font-size: 0.95rem; }

  .icon-btn-sm { width: 2.1rem; height: 2.1rem; }
  .icon-btn { width: 2.6rem; height: 2.6rem; }

  .cr-controls { flex-direction: column; align-items: stretch; }
  .cr-select { width: 100%; min-height: 42px; }

  .readme-toolbar { width: 100%; justify-content: space-between; }
  .readme-tabs { display: inline-flex; }
  .readme-split { grid-template-columns: 1fr; }
  .readme-split[data-mode="edit"] .readme-preview { display: none; }
  .readme-split[data-mode="preview"] .readme-textarea { display: none; }
  .readme-textarea, .readme-preview { min-height: 220px; }

  .inline-add-form { flex-direction: column; align-items: stretch; }
  .inline-add-form input { min-height: 44px; }
  .inline-add-form button { min-height: 44px; }

  .btn { min-height: 40px; }
  .btn-sm { min-height: 34px; }

  .login-card { padding: 1.75rem 1.5rem; }
}

@keyframes sheetUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
  .kpi-row, .stat-chip-row { grid-template-columns: 1fr 1fr; }
  .gauges-row { grid-template-columns: 1fr; gap: 0.6rem; }
  .gauge-box { height: 150px; }
  .hero-greeting { font-size: 1.1rem; }
  .hero-sub { font-size: 0.85rem; }
}