.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(32, 38, 48, 0.08);
  padding: calc(var(--space-3) + env(safe-area-inset-top)) calc(var(--space-4) + env(safe-area-inset-right)) var(--space-3) calc(var(--space-4) + env(safe-area-inset-left));
  box-shadow: 0 10px 24px rgba(44, 42, 32, 0.08);
}

.topbar .title {
  font-size: 1.05rem;
  margin: 0 0 var(--space-1);
  font-weight: 600;
  font-family: var(--font-display);
}

.topbar .subtitle {
  color: var(--muted);
  font-size: 0.85rem;
}

.sidebar {
  display: none;
  background: rgba(255, 255, 255, 0.9);
  border-right: 1px solid rgba(32, 38, 48, 0.1);
  padding: var(--space-4);
  gap: var(--space-3);
}

.sidebar .brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: rgba(255, 138, 61, 0.12);
  border: 1px solid rgba(255, 138, 61, 0.2);
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(255, 138, 61, 0.3), rgba(46, 196, 182, 0.2));
  border: 1px solid rgba(255, 138, 61, 0.35);
  font-weight: 700;
  color: #8a3a12;
}

.brand-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.brand-sub {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

.side-nav {
  display: grid;
  gap: 6px;
}

.sidebar a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--muted);
  font-weight: 600;
  border: 1px solid transparent;
}

.sidebar a.active {
  background: rgba(255, 138, 61, 0.16);
  border-color: rgba(255, 138, 61, 0.3);
  color: #8a3a12;
}

.main {
  padding: var(--space-4);
  padding-bottom: calc(var(--space-4) + var(--bottom-nav-h) + env(safe-area-inset-bottom));
  display: grid;
  gap: var(--space-4);
}

.pos-grid,
.intake-grid,
.tickets-grid,
.items-grid,
.stats-grid {
  display: grid;
  gap: var(--space-4);
}

.bottom-nav {
  position: fixed;
  bottom: calc(12px + env(safe-area-inset-bottom));
  left: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(32, 38, 48, 0.08);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  padding: 10px 12px;
  z-index: 50;
  border-radius: 22px;
  box-shadow: 0 18px 36px rgba(44, 42, 32, 0.16);
  backdrop-filter: blur(14px);
}

.bottom-nav a {
  min-height: 50px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
}

.bottom-nav a.active {
  color: #8a3a12;
  background: rgba(255, 138, 61, 0.18);
}

.sticky-bar {
  position: sticky;
  bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom) + 8px);
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  display: grid;
  gap: var(--space-2);
  box-shadow: var(--shadow-1);
}

.pos-grid .sticky-bar {
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(32, 38, 48, 0.1);
  box-shadow: 0 18px 40px rgba(44, 42, 32, 0.18);
}

.pos-grid .sticky-bar #stickyTotal {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #8a3a12;
}

.cart-sheet {
  position: static;
  max-height: none;
  overflow: visible;
  transform: none;
  transition: none;
  border-radius: var(--radius-lg);
}

.cart-sheet.open {
  transform: none;
}

.cart-toggle {
  display: inline-flex;
}

.items-cards {
  display: grid;
}

.table-wrap {
  display: none;
}

.mobile-only {
  display: block;
}

.desktop-only {
  display: none;
}

body.cart-open {
  overflow: hidden;
}

body.cart-open .main {
  overflow: hidden;
}

body.ticket-modal-open {
  overflow: hidden;
}

body.ticket-modal-open .main {
  overflow: hidden;
}

body.ticket-preview-open {
  overflow: hidden;
}

body.ticket-preview-open .main {
  overflow: hidden;
}

.page-section.tickets-detail-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(16, 20, 28, 0.32);
  z-index: 100;
}

.page-section.tickets-detail-modal.open {
  display: flex;
}

.page-section.tickets-detail-modal .card {
  width: min(520px, 94vw);
  max-height: min(85vh, 680px);
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.page-section {
  display: grid;
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .main {
    padding: var(--space-3);
    padding-bottom: calc(var(--space-4) + var(--bottom-nav-h) + env(safe-area-inset-bottom));
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .bottom-nav {
    left: 10px;
    right: 10px;
  }
}

@media (min-width: 960px) {
  .app-shell {
    grid-template-columns: 250px 1fr;
    grid-template-rows: 1fr;
    height: 100vh;
  }

  .sidebar {
    display: grid;
    align-content: start;
    position: sticky;
    top: 0;
    height: 100vh;
  }

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

  .main {
    padding: var(--space-5);
    padding-bottom: var(--space-5);
  }

  .sticky-bar {
    position: sticky;
    bottom: auto;
    top: 24px;
  }

  .cart-sheet {
    position: static;
    transform: none;
    max-height: none;
    border-radius: var(--radius-lg);
  }

  .cart-sheet .icon-btn {
    display: none;
  }

  .cart-toggle {
    display: none;
  }

  .items-cards {
    display: none;
  }

  .table-wrap {
    display: block;
  }

  .mobile-only {
    display: none;
  }

  .desktop-only {
    display: block;
  }

  .pos-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .intake-grid {
    grid-template-columns: 1fr 0.9fr;
    align-items: start;
  }

  .tickets-grid {
    grid-template-columns: 1.1fr 0.8fr;
    align-items: start;
  }

  .page-section.tickets-detail-modal {
    position: static;
    display: grid;
    padding: 0;
    background: none;
    z-index: auto;
  }

  .page-section.tickets-detail-modal.open {
    display: grid;
  }

  .page-section.tickets-detail-modal .card {
    max-height: none;
  }

  .items-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
  }

  .stats-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
}