/* ── Tablet ≤ 1024px ───────────────────────────── */
@media (max-width: 1024px) {
  .pulse-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .settings-grid { grid-template-columns: 1fr; }
}

/* ── Mobile ≤ 900px ────────────────────────────── */
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }

  .app-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(84vw, 300px);
    transform: translateX(-105%);
    transition: transform .25s var(--g-ease);
    z-index: 40;
  }

  .app-sidebar.is-open { transform: translateX(0); }
  .sidebar-close { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; color: var(--g-muted); }
  .sidebar-close svg { width: 20px; height: 20px; }
  .sidebar-header { display: flex; align-items: center; justify-content: space-between; }
  .sidebar-overlay.is-visible { display: block; }

  .topbar-menu-btn { display: flex; }

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

/* ── Small Mobile ≤ 560px ──────────────────────── */
@media (max-width: 560px) {
  .app-content { padding: 20px 16px 40px; }
  .app-topbar { padding: 0 16px; }

  .page-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .login-card { padding: 24px 20px; }
  .pulse-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .pulse-card { padding: 16px; }
  .pulse-number { font-size: 1.4rem; }
  .pulse-icon { width: 32px; height: 32px; flex-basis: 32px; }
  .pulse-hint { font-size: .64rem; }

  .dashboard-detail-modal {
    align-items: flex-end;
    padding: 8px 8px max(8px, env(safe-area-inset-bottom));
  }
  .dashboard-detail-modal .modal {
    width: 100%;
    max-height: min(82dvh, 720px);
    border-radius: 18px;
    transform: translateY(18px);
  }
  .dashboard-detail-modal.is-visible .modal { transform: translateY(0); }
  .dashboard-detail-modal .modal-header { padding: 17px 18px 0; }
  .dashboard-detail-modal .modal-body {
    min-height: 100px;
    max-height: calc(82dvh - 140px);
    padding: 16px 18px;
  }
  .dashboard-detail-modal .modal-actions {
    padding: 12px 18px calc(12px + env(safe-area-inset-bottom));
  }
  .metric-detail-row { padding: 12px; gap: 10px; }
  .metric-detail-copy strong { white-space: normal; }

  .people-grid { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .today-attendance { grid-template-columns: 1fr; }

  .checkin-info { flex-direction: column; align-items: flex-start; }
  .att-summary { flex-direction: column; }

  .filter-group { flex-direction: column; width: 100%; }
  .filter-group select { width: 100%; }

  body.notifications-open { overflow: hidden; }
  .notification-backdrop {
    position: fixed;
    inset: 0;
    z-index: 88;
    display: block;
    background: rgba(0,0,0,.58);
    backdrop-filter: blur(2px);
  }
  .notification-panel {
    position: fixed;
    top: auto;
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 8px;
    z-index: 90;
    width: auto;
    max-height: min(78vh, calc(100dvh - max(20px, env(safe-area-inset-top)) - 20px));
    border-radius: 18px;
  }
  .notification-sheet-handle {
    display: block;
    flex: 0 0 auto;
    width: 38px;
    height: 4px;
    margin: 8px auto 0;
    border-radius: 99px;
    background: var(--g-border);
  }
  .notification-panel-header { min-height: 54px; padding: 9px 14px 11px; }
  .notification-close { display: flex; }
  .notification-item { padding: 13px 14px; }
  .notification-popup-container {
    top: max(12px, env(safe-area-inset-top));
    right: 10px;
    left: 10px;
    width: auto;
  }
  .notification-popup {
    width: 100%;
    max-width: 100%;
    border-radius: 14px;
  }
}

/* ── Very Small ≤ 390px ────────────────────────── */
@media (max-width: 390px) {
  .pulse-grid { grid-template-columns: 1fr; }
  .pulse-card { padding: 16px; }
  .checkin-card { padding: 16px; }
  .settings-section { padding: 20px; }
}