*, *::before, *::after { box-sizing: border-box; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--fs-body);
  line-height: 1.45;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

/* Tabular numbers for money/qty */
.tabular {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-2);
  z-index: 10000;
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-2);
  outline: none;
  box-shadow: var(--focus-ring);
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-2) 0;
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}

.sidebar__brand {
  padding: 0 var(--space-2) var(--space-2);
  font-weight: 600;
  font-size: var(--fs-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2);
}

.sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar__nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px var(--space-2);
  color: var(--color-text);
  text-decoration: none;
  border-left: 3px solid transparent;
}
.sidebar__nav a:hover {
  background: var(--color-bg);
}
.sidebar__nav a:focus-visible {
  outline: none;
  box-shadow: inset var(--focus-ring);
}
.sidebar__nav a.is-active {
  background: var(--color-primary-muted);
  border-left-color: var(--color-primary);
  font-weight: 500;
}

.sidebar__section {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-2) var(--space-1);
}

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-2);
}

.topbar__title {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 600;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.content {
  padding: var(--space-3);
  flex: 1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 var(--space-2);
  font-family: inherit;
  font-size: var(--fs-md);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-drawer), border-color var(--transition-drawer), color var(--transition-drawer);
}
.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn--secondary:hover:not(:disabled) {
  background: var(--color-bg);
}

.btn--danger {
  background: var(--color-danger);
  color: #fff;
}
.btn--danger:hover:not(:disabled) {
  filter: brightness(0.95);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
}
.btn--lg {
  min-height: 48px;
  padding: 0 var(--space-3);
  font-size: var(--fs-lg);
}

/* Forms */
.field {
  margin-bottom: var(--space-2);
}
.field label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-text);
}
.field .hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: 4px;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  max-width: 420px;
  min-height: 40px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: var(--fs-body);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}
.field--error input,
.field--error select {
  border-color: var(--color-danger);
}
.field__error {
  font-size: var(--fs-sm);
  color: var(--color-danger);
  margin-top: 4px;
}

/* Tables */
.table-wrap {
  overflow: auto;
  max-height: calc(100vh - 200px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}
.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--color-bg);
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  white-space: nowrap;
}
.data-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.data-table tbody tr:hover {
  background: var(--color-bg);
}
.data-table .tabular {
  text-align: right;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: 600;
}
.badge--success { background: var(--color-success-bg); color: var(--color-success); }
.badge--warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge--danger { background: var(--color-danger-bg); color: var(--color-danger); }
.badge--info { background: var(--color-info-bg); color: var(--color-info); }

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-4);
  color: var(--color-text-muted);
}
.empty-state p {
  margin: 0 0 var(--space-2);
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

/* Toast */
#toast-host {
  position: fixed;
  bottom: var(--space-2);
  right: var(--space-2);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  min-width: 240px;
  max-width: 400px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-elevate);
  font-size: var(--fs-sm);
  animation: toast-in 200ms ease-out;
}
.toast--success { border-left: 4px solid var(--color-success); }
.toast--error { border-left: 4px solid var(--color-danger); }
.toast--info { border-left: 4px solid var(--color-info); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 8000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
  animation: fade-in 200ms ease-out;
}
.modal-backdrop[hidden] {
  display: none !important;
}
.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevate);
  border: 1px solid var(--color-border);
  animation: modal-in 200ms ease-out;
}
.modal__header {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.modal__header h2 {
  margin: 0;
  font-size: var(--fs-lg);
}
.modal__body {
  padding: var(--space-3);
}
.modal__footer {
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes modal-in {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

/* POS layout */
body.pos-mode .sidebar {
  display: none;
}
body.pos-mode .app-shell {
  display: block;
}
.pos-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-2);
  min-height: calc(100vh - var(--header-height) - var(--space-3) * 2);
}
@media (max-width: 960px) {
  .pos-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
}

.pos-cart {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  min-height: 400px;
}
.pos-cart__lines {
  flex: 1;
  overflow: auto;
  padding: var(--space-2);
}
.pos-total {
  font-size: var(--fs-display);
  font-weight: 700;
  text-align: right;
  padding: var(--space-2);
  border-top: 2px solid var(--color-border);
  background: var(--color-bg);
}
.pos-total.tabular {
  font-variant-numeric: tabular-nums;
}
.pos-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  padding: var(--space-2);
}
.pos-actions .btn--primary {
  grid-column: 1 / -1;
  min-height: 56px;
  font-size: var(--fs-xl);
}

.search-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
}
.search-panel input[type="search"] {
  width: 100%;
  min-height: 48px;
  font-size: var(--fs-md);
  padding: 0 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
}
.search-panel input:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.search-results {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  max-height: 320px;
  overflow: auto;
}
.search-results li button {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: none;
  border-bottom: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--fs-body);
}
.search-results li button:hover,
.search-results li button:focus-visible {
  background: var(--color-primary-muted);
  outline: none;
}

.offline-banner {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  padding: 8px var(--space-2);
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: 600;
}
.offline-banner[hidden] {
  display: none !important;
}

.kbd {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 2px 6px;
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
  background: var(--color-bg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}
@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
}