.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-height: var(--touch-min);
  padding: 0 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}

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

.btn-tertiary {
  background: transparent;
  color: var(--color-text-secondary);
  padding-inline: 10px;
}

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

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: #912018;
  color: #fff;
}

.btn-sm {
  min-height: 36px;
  padding: 0 12px;
  font-size: var(--font-size-sm);
}

.btn-icon {
  width: var(--touch-min);
  padding: 0;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--spacing-md);
}

.form-field label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

.form-ok {
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

.input,
.select,
.textarea {
  width: 100%;
  min-height: var(--touch-min);
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.textarea {
  min-height: 96px;
  resize: vertical;
}

.input:hover,
.select:hover,
.textarea:hover {
  border-color: var(--color-border-strong);
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.input.is-invalid,
.select.is-invalid {
  border-color: var(--color-danger);
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: var(--touch-min);
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-track {
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: var(--color-border-strong);
  position: relative;
  transition: background var(--transition);
  flex-shrink: 0;
}

.switch-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: transform var(--transition);
  box-shadow: var(--shadow-sm);
}

.switch input:checked + .switch-track {
  background: var(--color-primary);
}

.switch input:checked + .switch-track::after {
  transform: translateX(18px);
}

.switch input:focus-visible + .switch-track {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

.badge-active .badge-dot {
  background: var(--color-success);
}

.badge-inactive .badge-dot {
  background: var(--color-text-muted);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.card-body {
  padding: var(--spacing-lg);
}

.stat-card {
  padding: var(--spacing-lg);
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-card .stat-label {
  margin-top: 4px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.stat-card .stat-delta {
  margin-top: 8px;
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.page-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-header .page-subtitle {
  margin-top: 6px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.search-box {
  position: relative;
  flex: 1 1 220px;
  min-width: 180px;
}

.search-box svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-box .input {
  padding-left: 40px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.data-table th {
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-surface-muted);
}

.data-table td {
  font-size: var(--font-size-sm);
}

.data-table .cell-primary {
  font-weight: 500;
  color: var(--color-text-primary);
}

.data-table .cell-muted {
  color: var(--color-text-muted);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.table-actions {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
}

.card-list {
  display: none;
  flex-direction: column;
  gap: var(--spacing-md);
}

.qr-mobile-card {
  padding: var(--spacing-md);
}

.qr-mobile-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: 12px;
}

.qr-mobile-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.qr-mobile-card .meta-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
  font-size: var(--font-size-sm);
}

.qr-mobile-card .meta-row dt {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.qr-mobile-card .meta-row dd {
  margin: 0;
  word-break: break-all;
}

.qr-mobile-card .card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.empty-state,
.error-state {
  text-align: center;
  padding: 48px 24px;
}

.empty-state h2,
.error-state h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: 8px;
}

.empty-state p,
.error-state p {
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-surface-muted) 25%, #ebe7e1 50%, var(--color-surface-muted) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}

.skeleton-line {
  height: 14px;
  margin-bottom: 10px;
}

.skeleton-line.lg {
  height: 28px;
  width: 40%;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(47, 47, 47, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 80;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal {
  width: min(420px, 100%);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
}

.modal h2 {
  font-size: var(--font-size-xl);
  margin-bottom: 8px;
}

.modal p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.toast-host {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--color-text-primary);
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.copy-row code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  word-break: break-all;
}

.qr-preview {
  text-align: center;
}

.qr-preview img {
  width: min(240px, 100%);
  margin: 0 auto 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  background: #fff;
}

.qr-preview img:not(.is-visible) {
  display: none !important;
}

.qr-preview .preview-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.qr-preview .preview-url {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  word-break: break-all;
  margin-bottom: 16px;
}

.qr-preview .preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.collapse-panel {
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
}

.collapse-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: var(--touch-min);
  background: none;
  border: none;
  cursor: pointer;
  font-weight: 500;
  padding: 0;
}

.collapse-body {
  display: none;
  margin-top: 8px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  word-break: break-all;
}

.collapse-panel.is-open .collapse-body {
  display: block;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: var(--spacing-md);
}

@media (max-width: 768px) {
  .table-desktop {
    display: none;
  }

  .card-list {
    display: flex;
  }

  .page-header h1 {
    font-size: 26px;
  }
}