/* ==========================================================================
   Convo Monitor Mobile-First Layout Shell
   Spec: HotelEar_Premium_Shell_Motion.md §3–§6, §13 + HotelEar_UIUX_Design.md §4, §11
   Mobile-first: base styles target small screens, min-width queries scale up.
   Breakpoints: 620 / 860 / 1080 / 1280.
   Design tokens only — no hardcoded colours.
   ========================================================================== */

/* ---------------------------------------------------------------- global */
html, body { margin: 0; padding: 0; }
html { scroll-padding-top: calc(var(--topbar-h-sm) + var(--safe-top) + 12px); }
body { background: var(--bg); color: var(--text); overflow-x: hidden; }

/* No horizontal page scroll at any width */
main, .content, .app, .main, #content { max-width: 100vw; overflow-x: clip; }

.app { min-height: 100vh; min-height: 100dvh; }

/* 44px minimum tap targets, remove mobile tap-delay & accidental selection */
button, a, .btn, .chip, .bottom-nav-item, .topbar__btn, .nav-link,
label.switch-label, select, input[type=checkbox], input[type=radio] {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
button, a, .card, .row, .nav-link, .badge, .chip, .stat, .device-card {
  -webkit-user-select: none; user-select: none;
}

/* Skip link */
.skip-link {
  position: fixed; top: calc(8px + var(--safe-top)); left: 8px; z-index: 200;
  padding: 10px 16px; border-radius: var(--radius-sm);
  background: var(--primary); color: var(--primary-ink); font-weight: 600;
  transform: translateY(-300%); transition: transform var(--dur-fast) ease-out;
}
.skip-link:focus { transform: none; }

/* ---------------------------------------------------------------- shell snaps */
/* Mobile (<=860px): fixed drawer + topbar + bottom nav over a scrolling .main */
.main { margin-left: 0; display: flex; flex-direction: column; min-width: 0; }

/* ---------------------------------------------------------------- sidebar (drawer on mobile) */
.sidebar {
  width: min(86vw, 300px);
  position: fixed; inset: 0 auto 0 0; z-index: 75;
  padding-top: var(--safe-top);
  transform: translateX(-100%);
  transition: transform var(--dur-slow) var(--ease-out), box-shadow var(--dur-base) ease-out, width var(--dur-slow) var(--ease-out);
  box-shadow: none;
  border-right: 1px solid var(--border);
  background: var(--sidebar-bg, var(--surface));
}
html[data-drawer="open"] .sidebar,
.sidebar.open {
  transform: translateX(0);
  box-shadow: var(--shadow-3);
}

.sidebar__close {
  margin-left: auto;
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--surface-2); color: var(--text-2);
  cursor: pointer; flex-shrink: 0;
}
.sidebar__close:active { transform: scale(.94); }

/* Drawer overlay */
.overlay {
  position: fixed; inset: 0; z-index: 70;
  background: var(--overlay);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-base) ease-out;
}
.overlay.is-shown, .overlay.active { opacity: 1; pointer-events: auto; }

/* ---------------------------------------------------------------- topbar (mobile 56px) */
.topbar {
  position: sticky; top: 0; z-index: 65;
  height: calc(var(--topbar-h-sm) + var(--safe-top));
  padding: var(--safe-top) 8px 0 calc(8px + var(--safe-left));
  gap: 6px;
  display: flex; align-items: center;
  background: var(--topbar-bg);
  -webkit-backdrop-filter: blur(16px) saturate(1.3); backdrop-filter: blur(16px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) ease-out, box-shadow var(--dur-base) ease-out, transform var(--dur-base) var(--ease-out);
}
.topbar.is-scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-xs); }
.topbar.is-hidden { transform: translateY(-100%); }

.topbar__btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; flex-shrink: 0;
  border: none; border-radius: var(--radius-sm);
  background: transparent; color: var(--text-2); cursor: pointer;
  position: relative;
}
.topbar__btn:hover { background: var(--surface-2); color: var(--text); }
.topbar__btn:active { transform: scale(.94); }

.topbar__title {
  flex: 1; min-width: 0; margin: 0;
  font-size: 17px; font-weight: 700; letter-spacing: -0.01em; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  line-height: 1.2;
}

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

/* Bell dot */

/* ---------------------------------------------------------------- alert stack + offline banner */
.alert-stack {
  display: flex; flex-direction: column; gap: 10px;
  padding: 8px var(--content-pad) 0;
  z-index: 66;
}
.offline-banner {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin: 8px var(--content-pad) 0;
  padding: 9px 12px; border-radius: var(--radius);
  background: var(--warning-soft); color: var(--warning-text);
  border: 1px solid var(--warning);
  font-size: 13px; font-weight: 600;
}

/* ---------------------------------------------------------------- content */
.content {
  width: 100%; max-width: 1560px; margin: 0 auto;
  padding: var(--content-pad) var(--content-pad) calc(var(--bottom-nav-h) + var(--safe-bottom) + var(--content-pad) + 24px);
}

.page-head {
  display: flex; flex-direction: column; align-items: stretch;
  gap: 10px; margin-bottom: 16px;
}
.page-head h1 { font-size: 20px; }
.page-head .row { width: 100%; }

/* ---------------------------------------------------------------- grids (mobile-first) */
.stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { padding: 14px 14px; }
.stat .value { font-size: 24px; }
.stat .label { font-size: 11px; }

.grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.grid-2 > .stack { display: contents; }
.grid-2 > .stack > * { min-width: 0; }
.card, .device-card { margin-bottom: 0; }

.card { padding: 16px; border-radius: var(--radius-lg); }
.card + .card { margin-top: 12px; }

/* ---------------------------------------------------------------- sticky bottom action bar (mobile) */

/* ---------------------------------------------------------------- footer */
.app-footer {
  text-align: center; padding: 14px 16px calc(72px + var(--safe-bottom));
  color: var(--text-3); font-size: 12px;
}

/* ---------------------------------------------------------------- bottom nav (mobile) */
.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  height: calc(var(--bottom-nav-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  padding-left: var(--safe-left); padding-right: var(--safe-right);
  display: flex;
  background: var(--bottom-nav-bg);  /* ~solid already; a backdrop blur here cost a repaint on every scroll */
  border-top: 1px solid var(--border-light);
  box-shadow: 0 -4px 16px rgba(24, 33, 47, 0.05);
  transition: transform var(--dur-base) var(--ease-out);
}
.bottom-nav.is-hidden { transform: translateY(100%); }

.bottom-nav-item {
  flex: 1; position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; min-height: 44px; padding: 6px 2px 4px;
  color: var(--text-3); font-size: 10.5px; font-weight: 500; letter-spacing: .01em;
  border: none; background: none; cursor: pointer;
  text-decoration: none; -webkit-tap-highlight-color: transparent;
}
.bottom-nav-item:hover { color: var(--text-2); text-decoration: none; }
/* Icon sits in a soft pill that fills in for the current page (Material 3 / iOS style). */
.bottom-nav-item__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 28px; border-radius: 999px;
  transition: background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.bottom-nav-item__icon svg { width: 21px; height: 21px; stroke-width: 1.8; }
.bottom-nav-item:active .bottom-nav-item__icon { transform: scale(.92); }
.bottom-nav-item.active { color: var(--primary); font-weight: 600; }
.bottom-nav-item.active .bottom-nav-item__icon { background: var(--primary-soft); }
.bottom-nav-item.active .bottom-nav-item__icon svg { stroke-width: 2.1; }
.bottom-nav-item__label { line-height: 1; white-space: nowrap; }
.bottom-nav-item__badge {
  position: absolute; top: 3px; left: calc(50% + 6px);
  min-width: 17px; height: 17px; padding: 0 5px;
  border-radius: 999px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--danger); color: #fff; font-size: 10px; font-weight: 700; line-height: 1;
  box-shadow: 0 0 0 2px var(--surface);
}

/* ---------------------------------------------------------------- search overlay (mobile) */
.search-overlay {
  position: fixed; inset: 0; z-index: 80;
  display: flex; flex-direction: column;
  background: var(--surface);
  padding-top: var(--safe-top);
  opacity: 0; pointer-events: none;
  transform: translateY(-8px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.search-overlay.is-open { opacity: 1; pointer-events: auto; transform: none; }
.search-overlay__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}
.search-overlay__bar .global-search-icon { position: static; margin-left: 4px; }
.search-overlay__bar input {
  min-height: 44px; margin: 0; font-size: 16px; border: none; background: transparent;
  box-shadow: none; border-radius: 0; padding: 0 6px;
}
.search-overlay__bar input:focus { box-shadow: none; }
.search-overlay__results { flex: 1; overflow-y: auto; padding: 8px; }
.search-result {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; margin-bottom: 6px; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text); font-size: 14px; font-weight: 500; text-decoration: none;
}
.search-result:hover { text-decoration: none; border-color: var(--primary); }
.search-result strong { display: block; color: var(--text); }
.search-result small { color: var(--text-2); font-weight: 400; }
.search-result .empty {
  text-align: center; color: var(--text-3); width: 100%; padding: 24px 0;
}
.search-empty { text-align: center; color: var(--text-3); padding: 40px 16px; font-size: 13.5px; }

/* ---------------------------------------------------------------- utility visibility */
.dsktop-only { display: none !important; }

/* ==========================================================================
   ≥ 620px : phones larger / small tablets
   ========================================================================== */
@media (min-width: 620px) {
  .content { padding: var(--content-pad-lg) var(--content-pad-lg) calc(var(--bottom-nav-h) + var(--safe-bottom) + var(--content-pad-lg) + 24px); }
  .alert-stack { padding: 10px var(--content-pad-lg) 0; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 16px 20px; }
  .stat .value { font-size: 26px; }
  .page-head { flex-direction: row; align-items: flex-end; flex-wrap: wrap; }
  .page-head .row { width: auto; margin-left: auto; }
  
  .app-footer { padding-bottom: calc(76px + var(--safe-bottom)); }
}

/* ==========================================================================
   ≥ 860px : tablets — mini sidebar, no bottom nav, desktop topbar
   ========================================================================== */
@media (min-width: 861px) {
  .dsktop-only { display: inline-flex !important; }
  .global-search.dsktop-only { display: block !important; }
  .mobile-only { display: none !important; }

  html[data-drawer="open"] .sidebar { transform: none; box-shadow: none; }
  html[data-drawer="open"] .overlay { display: none; }

  .sidebar {
    width: var(--sidebar-w-mini);
    transform: none;
    padding-top: 0;
    z-index: 30; box-shadow: none;
    transition: width var(--dur-slow) var(--ease-out);
  }
  html[data-sidebar="expanded"] .sidebar { width: var(--sidebar-w); box-shadow: var(--shadow-3); }
  html[data-sidebar="expanded"] .sidebar .sidebar__close { display: none; }

  /* mini sidebar treatment */
  html[data-sidebar="mini"] .sidebar .nav-text,
html[data-sidebar="mini"] .sidebar .nav-section-title,
html[data-sidebar="mini"] .sidebar .brand-name { display: none; }
  html[data-sidebar="mini"] .sidebar-header { justify-content: center; padding: 0 8px; }
  html[data-sidebar="mini"] .sidebar-footer { flex-direction: column; gap: 4px; padding: 10px 6px; }
  html[data-sidebar="mini"] .sidebar-footer .btn { min-width: 44px; min-height: 44px; padding: 0; justify-content: center; }
  html[data-sidebar="mini"] .nav-link { justify-content: center; padding: 0; gap: 0; width: 46px; height: 44px; margin-inline: auto; }
  html[data-sidebar="mini"] .nav-link .nav-icon { margin: 0; }

  /* tooltips in mini mode */
  html[data-sidebar="mini"] .nav-link[data-tip]::after {
    content: attr(data-tip);
    position: absolute; left: calc(100% + 12px); top: 50%;
    transform: translate(-4px, -50%);
    padding: 6px 10px; border-radius: 8px;
    background: var(--text); color: var(--surface);
    font-size: 12px; font-weight: 500; white-space: nowrap;
    opacity: 0; pointer-events: none; z-index: 100;
    transition: opacity var(--dur-fast) ease-out var(--dur-base), transform var(--dur-fast) ease-out var(--dur-base);
  }
  html[data-sidebar="mini"] .nav-link[data-tip]:hover::after,
  html[data-sidebar="mini"] .nav-link[data-tip]:focus-visible::after { opacity: 1; transform: translate(0, -50%); }

  .sidebar__close { display: none; }

  .main { margin-left: var(--sidebar-w-mini); }
  html[data-sidebar="expanded"] .main { margin-left: var(--sidebar-w-mini); }

  /* desktop topbar */
  .topbar {
    height: var(--topbar-h);
    padding: 0 calc(16px + var(--safe-right)) 0 calc(16px + var(--safe-left));
    gap: 16px;
  }
  .topbar__btn { display: none; }
  .topbar__title { display: none; }

  .content {
    padding: 24px 28px 60px;
  }
  .alert-stack { padding: 12px 28px 0; }
  .app-footer { padding: 16px 24px calc(16px + var(--safe-bottom)); }

  .bottom-nav, .overlay { display: none; }

  .stat-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-2 { grid-template-columns: 2fr 1fr; }
  .grid-2 > .stack { display: grid; gap: 16px; align-content: start; }

  
  
  

  .card { padding: 22px 24px; }
  .card + .card { margin-top: 20px; }

  /* wide tables stay scrollable inside .table-scroll */
  .table-wrap { overflow-x: auto; }
}

/* ==========================================================================
   ≥ 1080px : desktop-lite
   ========================================================================== */
@media (min-width: 1080px) {
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .stat-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ==========================================================================
   ≥ 1280px : full sidebar pushes content, KPI 4 columns
   ========================================================================== */
@media (min-width: 1280px) {
  html[data-sidebar="expanded"] .main { margin-left: var(--sidebar-w); }
  html[data-sidebar="expanded"] .sidebar { box-shadow: none; }
  html[data-sidebar="mini"] .main { margin-left: var(--sidebar-w-mini); }
}