/* ════════════════════════════════════════
   FinOS — Responsive CSS
   Mobile-first, works on all screen sizes
   ════════════════════════════════════════ */

/* ── Mobile overlay sidebar ── */
@media (max-width: 768px) {
  .app-shell { flex-direction: column; }

  /* Sidebar becomes a slide-in drawer */
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 300; width: 260px;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
  }
  .sidebar.open { transform: translateX(0); }

  /* Overlay backdrop */
  .sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.4); z-index: 299;
  }
  .sidebar.open ~ .sidebar-overlay,
  .sidebar-overlay.open { display: block; }

  /* Topbar becomes full width with menu button */
  .topbar { padding: 0 12px; }
  .topbar-breadcrumb-current { font-size: 14px; }

  /* Main area takes full width */
  .main-area { width: 100%; min-height: 100vh; }
  .page-inner { padding: 14px; }

  /* Hamburger button in topbar */
  #menu-toggle {
    display: flex; width: 34px; height: 34px;
    border-radius: 8px; border: none; background: none;
    cursor: pointer; align-items: center; justify-content: center;
    color: var(--text-secondary); flex-shrink: 0;
    transition: background 0.12s;
  }
  #menu-toggle:hover { background: var(--bg-subtle); }

  /* Grids collapse */
  .grid-4 { grid-template-columns: 1fr 1fr !important; gap: 10px; }
  .grid-3 { grid-template-columns: 1fr 1fr !important; gap: 10px; }
  .form-row { flex-direction: column !important; }
  .form-row-3 { flex-direction: column !important; }

  /* Page header stacks */
  .page-header { flex-direction: column; gap: 10px; }
  .page-header-actions { width: 100%; }
  .page-header-actions .btn { width: 100%; justify-content: center; }

  /* Table horizontal scroll */
  .table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .data-table { min-width: 600px; }
  .col-actions { min-width: 80px; }

  /* Modals full screen on mobile */
  .modal { width: calc(100vw - 24px) !important; max-width: none; margin: 12px; }
  .modal-overlay { align-items: flex-end; padding: 0; }
  .modal { border-radius: 16px 16px 0 0 !important; }

  /* Cards */
  .card { border-radius: 10px; }
  .card-body { padding: 14px; }
  .card-header { padding: 12px 14px; }

  /* Invoice detail actions wrap */
  .invoice-actions-bar { flex-wrap: wrap; }

  /* Tabs scroll horizontally */
  .tabs { overflow-x: auto; white-space: nowrap; scrollbar-width: none; -webkit-overflow-scrolling: touch; flex-wrap: nowrap !important; }
  .tabs::-webkit-scrollbar { display: none; }
  .tab-item { flex-shrink: 0; }

  /* Metric cards smaller */
  .metric-card { padding: 14px; }
  .metric-value { font-size: 20px; }

  /* Login page */
  .lp-left { display: none !important; }
  .lp-right { width: 100% !important; padding: 24px !important; }

  /* Hide non-essential topbar elements */
  .topbar-search { display: none; }
}

/* ── Tablet (768–1024px) ── */
@media (min-width: 769px) and (max-width: 1024px) {
  :root { --sidebar-width: 190px; }
  .page-inner { padding: 18px; }
  .grid-4 { grid-template-columns: 1fr 1fr !important; }
  #menu-toggle { display: none; }
}

/* ── Desktop (> 1024px) ── */
@media (min-width: 1025px) {
  #menu-toggle { display: none; }
  .sidebar { transform: none !important; }
}

/* ── Print ── */
@media print {
  .sidebar, .topbar, .toast-container, .no-print { display: none !important; }
  .main-area { width: 100%; }
  .page-inner { padding: 0; }
  .card { box-shadow: none; border: none; }
}