/* ============================================================
   layout.css — App shell: loading screen, login, sidebar,
                topbar, main content wrapper, page areas
   ============================================================ */

/* ── Initial loading screen ─────────────────────────────────── */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  gap: 16px;
}

.load-text {
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 600;
  color: var(--txt-3);
}

/* ── Login / auth screens ───────────────────────────────────── */
#login-screen,
#org-selector-screen {
  min-height: 100vh;
  width: 100vw;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
}

.login-card {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow:    var(--shadow-lg);
  padding:       40px 44px;
  width:         100%;
  max-width:     400px;
  animation: slideUp .25s var(--ease);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.login-brand-name { font-family: var(--font-title); font-size: 17px; font-weight: 700; color: var(--txt-1); }
.login-brand-sub  { font-size: 11px; color: var(--txt-4); margin-top: 1px; }

.login-heading { font-size: 20px; margin-bottom: 6px; }
.login-sub     { font-size: 13px; color: var(--txt-3); margin-bottom: 24px; }

.login-error {
  font-size: 12px;
  color: var(--error);
  background: var(--error-bg);
  border: 1px solid var(--error-bd);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  margin-bottom: 14px;
  display: none;
}
.login-error.visible { display: block; }

/* ── App shell ──────────────────────────────────────────────── */
#app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
  width:     var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 100;
  overflow: hidden;
  transition: width 220ms var(--ease), min-width 220ms var(--ease);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  /* Left padding (20px) matches the nav row inner edge:
     sidebar-nav padding-left (8) + nav-item padding-left (12) = 20.
     The "MENU" label therefore lines up vertically with each
     nav item's icon below it. */
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  height: var(--topbar-h);
  flex-shrink: 0;
  position: relative;
}

/* Expand button — hidden when expanded, shown (centered) when collapsed.
   Acts as the click target to re-expand the sidebar in collapsed state. */
.sidebar-expand-btn {
  width: 36px; height: 36px;
  border: none;
  border-radius: var(--r-sm);
  background: var(--surface-3);
  color: var(--txt-2);
  padding: 0;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.sidebar-expand-btn:hover { background: var(--primary-50); color: var(--primary-text); }
.sidebar-expand-btn:active { transform: scale(.95); }
.sidebar-expand-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* "Menu" label shown in expanded state in place of the old brand text */
.sidebar-menu-label {
  flex: 1;
  min-width: 0;
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--txt-3);
  white-space: nowrap;
  overflow: hidden;
  opacity: 1;
  transition: opacity 160ms var(--ease), max-width 220ms var(--ease);
}

/* ── Sidebar toggle button ──────────────────────────────────── */
.sidebar-toggle {
  margin-left: auto;
  flex-shrink: 0;
  width: 32px; height: 32px;
  border: none;
  border-radius: var(--r-sm);
  background: var(--surface-3);
  color: var(--txt-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.sidebar-toggle:hover { background: var(--primary-50); color: var(--primary-text); }
.sidebar-toggle:active { transform: scale(.95); }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--txt-3);
  cursor: pointer;
  user-select: none;
  position: relative;
  white-space: nowrap;
  transition: background var(--dur), color var(--dur), padding var(--dur), justify-content var(--dur);
}
.nav-item:hover  { background: var(--surface-3); color: var(--txt-1); }
.nav-item.active { background: var(--primary-50); color: var(--primary-text); font-weight: 600; }

.nav-label {
  overflow: hidden;
  transition: opacity 160ms var(--ease), max-width 220ms var(--ease);
  max-width: 160px;
}

.nav-icon {
  font-size: 16px;
  width: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: .7;
}
.nav-item.active .nav-icon { opacity: 1; }

/* ── Collapsed sidebar ──────────────────────────────────────── */
body.sidebar-collapsed .sidebar         { width: 64px; min-width: 64px; }
body.sidebar-collapsed .main-wrapper   { margin-left: 64px; }

body.sidebar-collapsed .sidebar-header      { padding: 13px 0; justify-content: center; gap: 0; }
body.sidebar-collapsed .sidebar-menu-label  { opacity: 0; max-width: 0; }
body.sidebar-collapsed .sidebar-toggle      { display: none; }
body.sidebar-collapsed .sidebar-expand-btn  { display: flex; }

body.sidebar-collapsed .sidebar-nav    { padding: 10px 6px; }
body.sidebar-collapsed .nav-item       { justify-content: center; padding: 10px 0; }
body.sidebar-collapsed .nav-label      { opacity: 0; max-width: 0; }
body.sidebar-collapsed .nav-icon       { opacity: .8; width: 20px; }
body.sidebar-collapsed .nav-item.active .nav-icon { opacity: 1; }

/* Tooltip on hover in collapsed state */
body.sidebar-collapsed .nav-item::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--txt-1);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms var(--ease);
  z-index: 500;
}
body.sidebar-collapsed .nav-item:hover::after { opacity: 1; }

/* Footer in collapsed state */
body.sidebar-collapsed .sidebar-footer      { padding: 12px 4px; }
body.sidebar-collapsed .sidebar-user        { justify-content: center; padding: 8px 0; }
body.sidebar-collapsed .sidebar-user-info   { display: none; }
/* Sign out collapses to icon-only and stays visible — same treatment as
   the nav items above (.nav-item rules drive the label hide + tooltip). */
body.sidebar-collapsed .sidebar-logout      { justify-content: center; padding: 10px 0; }


.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  margin-bottom: 4px;
}

.sidebar-avatar,
.user-avatar-sm {
  width: 30px; height: 30px;
  background: var(--primary-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px; font-weight: 700;
  color: var(--primary-text);
  flex-shrink: 0;
}

.sidebar-user-name { font-size: 13px; font-weight: 600; color: var(--txt-1); line-height: 1.2; }
.sidebar-user-role { font-size: 11px; color: var(--txt-4); text-transform: capitalize; }

/* Sign out — reuses .nav-item styling so it aligns visually with the
   sidebar's main nav, but it's a <button>. Reset native button defaults
   and add a destructive-tint hover so it reads as a separate action. */
button.nav-item.sidebar-logout {
  width: 100%;
  background: transparent;
  border: none;
  text-align: left;
  font-family: inherit;
  margin-top: 4px;
}
button.nav-item.sidebar-logout:hover {
  background: var(--error-50, #fef2f2);
  color: var(--error, #dc2626);
}
button.nav-item.sidebar-logout:hover .nav-icon { opacity: 1; color: var(--error, #dc2626); }
button.nav-item.sidebar-logout:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── Main wrapper ───────────────────────────────────────────── */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  transition: margin-left 220ms var(--ease);
}

/* ── Topbar ─────────────────────────────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  flex-shrink: 0;
}

.topbar-title {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--txt-1);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Mobile-only hamburger button in topbar — hidden on desktop/tablet. */
.topbar-menu-btn {
  display: none;
  width: 36px; height: 36px;
  border: none;
  border-radius: var(--r-sm);
  background: var(--surface-3);
  color: var(--txt-2);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.topbar-menu-btn:hover { background: var(--primary-50); color: var(--primary-text); }
.topbar-menu-btn:active { transform: scale(.95); }

/* ── Sidebar backdrop (mobile offcanvas) ────────────────────── */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .45);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 220ms var(--ease), visibility 0s linear 220ms;
}
body.sidebar-mobile-open .sidebar-backdrop {
  opacity: 1;
  visibility: visible;
  transition: opacity 220ms var(--ease);
}

/* ── Page content ───────────────────────────────────────────── */
.page-content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.page        { display: none; }
.page.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  animation: fadeIn .18s var(--ease);
}
/* Standard pages scroll with padding — excludes pages with custom internal layout */
.page.active:not(#page-dashboard):not(#page-box-lookup):not(#page-uploads):not(#page-settings):not(#page-inventory):not(#page-orders) {
  padding: 24px;
  overflow-y: auto;
}

/* ── Settings page layout ───────────────────────────────────── */
#page-settings { overflow: hidden; }

.settings-sticky {
  flex-shrink: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 18px 24px 0;
}
.settings-sticky .section-header { margin-bottom: 14px; }

/* Body is a flex column — tab panels fill it and scroll themselves */
.settings-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 20px 24px 24px;
}

/* Every active settings tab panel fills remaining height and scrolls */
#page-settings .tab-panel.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

/* Logs tab: panel itself does NOT scroll — only the content area inside does */
#page-settings #tab-logs.tab-panel.active {
  overflow: hidden;
}

/* System Status tab: same viewport-fit pattern as Inventory / Orders.
   The tab-panel doesn't scroll; the card fills it and the inner content
   region scrolls internally if the diagnostics rows overflow. Keeps the
   page free of an outer scrollbar regardless of admin tooling height. */
#page-settings #tab-system.tab-panel.active {
  overflow: hidden;
}
#tab-system > .card {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#tab-system > .card > .card-header { flex-shrink: 0; }
#tab-system #system-status-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.settings-logs-card {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* Logs content: fills remaining card space and scrolls */
.settings-logs-content {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}
#logs-pagination { flex-shrink: 0; }

/* ── Inventory + Orders: viewport-fit table pages ───────────── */
#page-inventory,
#page-orders {
  overflow: hidden;
  padding: 16px;
}

/* Card fills remaining height as a flex column */
#page-inventory > .card,
#page-orders > .card {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* Filter bar and delete bar never shrink */
#page-inventory .filter-bar,
#page-orders .filter-bar,
#inv-delete-bar { flex-shrink: 0; }

/* Table wrap fills remaining space and scrolls vertically */
#page-inventory .table-wrap,
#page-orders .table-wrap {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

/* Pagination stays pinned at the bottom */
#page-inventory .pagination,
#page-orders .pagination { flex-shrink: 0; }

/* ── Box Lookup dedicated page ──────────────────────────────── */
#page-box-lookup { overflow: hidden; }

.blookup-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}

.blookup-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

.blookup-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  gap: 16px;
  text-align: center;
  color: var(--txt-4);
}
.blookup-empty-icon { opacity: .35; margin-bottom: 4px; }
.blookup-empty-title { font-size: 15px; font-weight: 600; color: var(--txt-3); }
.blookup-empty-sub { font-size: 13px; color: var(--txt-4); max-width: 320px; }

/* ── Uploads page ───────────────────────────────────────────── */
#page-uploads { overflow: hidden; }

.uploads-top {
  flex-shrink: 0;
  padding: 18px 24px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

/* Upload History uses the same viewport-fit flex pattern as Inventory /
   Orders: the card becomes a flex column, the filter-bar sits at the top
   without scrolling, and only the table-wrap scrolls. This avoids the
   sticky-positioning quirks (transparent rows bleeding through, etc.)
   that previously appeared with a sticky filter-bar inside a scroll
   container. */
.uploads-history {
  flex: 1;
  overflow: hidden;
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.uploads-history > .card-table {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.uploads-history > .card-table > .filter-bar { flex-shrink: 0; }
.uploads-history > .card-table > .table-wrap {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

/* Sticky table headers across scrollable page sections.
   Settings tabs + Box Lookup still use a page-level scroll container, so
   their table-wraps need overflow:visible to let <thead> stick to the
   outer scrollbox. Uploads now scrolls inside .table-wrap itself, so it
   keeps the default overflow. */
#page-settings .tab-panel .table-wrap,
.blookup-body .table-wrap {
  overflow: visible;
}

/* ── Section header ─────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.section-title   { font-family: var(--font-title); font-size: 20px; font-weight: 700; color: var(--txt-1); }
.section-sub     { font-size: 13px; color: var(--txt-3); margin-top: 3px; }
.section-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

/* ──────────────────────────────────────────────────────────────
   Responsive
   ─────────────────────────────────────────────────────────────
   Strategy:
   - Desktop  (>1024px): viewport-fit layout (no main page scroll —
     only tables, charts, and content regions scroll internally).
   - Tablet   (≤1024px): main wrapper scrolls; pages and inner
     regions revert to natural page flow. Sidebar still inline.
   - Mobile   (≤768px):  sidebar becomes off-canvas with backdrop.
                         Hamburger button in the topbar opens it.
   - Small    (≤480px):  tighter paddings and stacked elements.
   ────────────────────────────────────────────────────────────── */

/* ── Tablet & below: allow main page to scroll ──────────────── */
@media (max-width: 1024px) {
  #app-shell {
    height: auto;
    min-height: 100vh;
    overflow: visible;
  }
  .main-wrapper {
    height: auto;
    min-height: 100vh;
    overflow: visible;
  }
  .page-content {
    overflow: visible;
    flex: 1 1 auto;
  }
  .page.active {
    overflow: visible;
    flex: 1 1 auto;
  }

  /* Pages with custom viewport-fit flex layout revert to natural flow */
  #page-dashboard,
  #page-box-lookup,
  #page-uploads,
  #page-settings,
  #page-inventory,
  #page-orders { overflow: visible; }

  /* Internal scroll regions release their scroll on tablet — page scrolls instead */
  .dash-charts-area,
  .blookup-body,
  .uploads-history,
  #page-settings .tab-panel.active,
  .settings-logs-content {
    overflow: visible;
    flex: 0 0 auto;
  }

  /* Tables still scroll horizontally when they overflow */
  #page-inventory .table-wrap,
  #page-orders .table-wrap,
  .uploads-history .table-wrap {
    flex: 0 0 auto;
    overflow-x: auto;
    overflow-y: visible;
    max-height: none;
  }

  /* Settings tab content stops being a viewport-fit flex column */
  .settings-body { flex: 0 0 auto; }
  .settings-logs-card { min-height: 0; }

  /* Topbar no longer needs to be sticky inside a fixed shell */
  .topbar { position: sticky; top: 0; }

  /* Padding trims for denser content */
  #page-inventory,
  #page-orders { padding: 14px; }
  .uploads-top { padding: 14px 16px 12px; }
  .uploads-history { padding: 12px 16px 16px; }
  .blookup-search { padding: 10px 16px; }
  .blookup-body { padding: 16px; }
  .settings-sticky { padding: 14px 16px 0; }
  .settings-body { padding: 14px 16px 16px; }
}

/* ── Mobile: off-canvas sidebar with backdrop ───────────────── */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; --topbar-h: 56px; }

  /* Sidebar slides off-screen by default; opens via .sidebar-mobile-open */
  .sidebar {
    width: 260px;
    min-width: 260px;
    transform: translateX(-100%);
    transition: transform 240ms var(--ease);
    z-index: 1000;
  }
  body.sidebar-mobile-open .sidebar { transform: translateX(0); }

  /* Always show expanded sidebar contents in the off-canvas view */
  body.sidebar-collapsed .sidebar { width: 260px; min-width: 260px; }
  body.sidebar-collapsed .sidebar-header      { padding: 14px 16px; justify-content: flex-start; gap: 10px; }
  body.sidebar-collapsed .sidebar-toggle      { display: none; }
  body.sidebar-collapsed .sidebar-expand-btn  { display: none; }
  body.sidebar-collapsed .sidebar-menu-label  { opacity: 1; max-width: none; }
  body.sidebar-collapsed .sidebar-nav        { padding: 10px 8px; }
  body.sidebar-collapsed .nav-item           { justify-content: flex-start; padding: 9px 12px; }
  body.sidebar-collapsed .nav-label          { opacity: 1; max-width: none; }
  body.sidebar-collapsed .sidebar-user-info  { display: block; }
  body.sidebar-collapsed .sidebar-logout     { justify-content: flex-start; padding: 9px 12px; }

  /* In off-canvas mode the in-sidebar toggle hides — topbar hamburger handles open. */
  .sidebar-toggle { display: none; }

  /* Main wrapper now occupies full width */
  .main-wrapper { margin-left: 0; }
  body.sidebar-collapsed .main-wrapper { margin-left: 0; }

  /* Topbar hamburger appears */
  .topbar-menu-btn { display: flex; }
  .topbar { padding: 0 14px; gap: 10px; }
  .topbar-title { font-size: 16px; }

  /* Tighter page paddings */
  #page-inventory,
  #page-orders { padding: 10px; }
  .uploads-top { padding: 12px; }
  .uploads-history { padding: 10px 12px 14px; }
  .blookup-search { padding: 10px 12px; }
  .blookup-body { padding: 12px; }
  .settings-sticky { padding: 12px 12px 0; }
  .settings-body { padding: 12px; }
}

/* ── Small mobile: tightest layout ──────────────────────────── */
@media (max-width: 480px) {
  :root { --topbar-h: 52px; }
  .topbar { padding: 0 10px; gap: 8px; }
  .topbar-title { font-size: 15px; }
  .topbar-actions { gap: 6px; }
  .login-card { padding: 28px 22px; }
  .section-title { font-size: 18px; }
}