/* ============================================================================
   POS NHÀ LÀM · KING'S GRILL — DESIGN SYSTEM VẬN HÀNH CHUẨN ENTERPRISE SAAS
   Triết lý: Modern Professional Minimalism · Tương phản WCAG 2.2 AA · Chạm >= 44px
   ============================================================================ */

:root {
  --ops-bg: #f4f6f9;
  --ops-surface: #ffffff;
  --ops-surface-muted: #f8fafc;
  --ops-surface-hover: #f1f5f9;
  --ops-border: #e2e8f0;
  --ops-border-strong: #cbd5e1;

  --ops-ink: #0f172a;
  --ops-ink-secondary: #334155;
  --ops-ink-muted: #64748b;

  --ops-primary: #1d4ed8;
  --ops-primary-hover: #1e40af;
  --ops-primary-soft: #eff6ff;
  --ops-primary-border: #bfdbfe;

  --ops-success: #047857;
  --ops-success-bg: #ecfdf5;
  --ops-success-border: #a7f3d0;

  --ops-warning: #b45309;
  --ops-warning-bg: #fffbeb;
  --ops-warning-border: #fde68a;

  --ops-danger: #b91c1c;
  --ops-danger-bg: #fef2f2;
  --ops-danger-border: #fecaca;

  --ops-radius-sm: 8px;
  --ops-radius-md: 12px;
  --ops-radius-lg: 16px;

  --ops-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --ops-shadow-md: 0 4px 12px rgba(15, 23, 42, 0.07);
  --ops-shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.14);

  --ops-font: var(--font-sans, "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
}

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

html, body.ops-body {
  margin: 0;
  padding: 0;
  background: var(--ops-bg);
  color: var(--ops-ink);
  font-family: var(--ops-font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

.hidden {
  display: none !important;
}

/* Focus Accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ops-primary);
  outline-offset: 2px;
}

/* Sticky Operational Topbar */
.ops-topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: #ffffff;
  border-bottom: 1px solid var(--ops-border);
  box-shadow: var(--ops-shadow-sm);
  padding: 10px 16px;
}

.ops-topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.ops-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ops-ink);
  min-width: 0;
}

.ops-brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  object-fit: contain;
  flex-shrink: 0;
  border: 1px solid var(--ops-border);
  background: #fff;
}

.ops-brand-titles {
  min-width: 0;
}

.ops-brand-title {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ops-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ops-brand-sub {
  margin: 0;
  font-size: 12px;
  color: var(--ops-ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

/* Connection & Context-Aware Server Bar */
.ops-conn-strip {
  background: #0f172a;
  color: #f8fafc;
  padding: 8px 16px;
  font-size: 13px;
}

.ops-conn-strip-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.ops-conn-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ops-conn-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ops-mode-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.ops-mode-pill.is-online {
  background: rgba(16, 185, 129, 0.18);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.ops-mode-pill.is-offline-lan {
  background: rgba(59, 130, 246, 0.22);
  color: #93c5fd;
  border: 1px solid rgba(96, 165, 250, 0.4);
}

.ops-offline-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 12px;
  border-radius: var(--ops-radius-sm);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid #34d399;
  background: #059669;
  color: #ffffff;
  text-decoration: none;
  transition: opacity 150ms ease, transform 150ms ease, background-color 150ms ease;
}

.ops-offline-switch-btn:hover:not(:disabled):not(.is-dimmed) {
  background: #047857;
}

.ops-offline-switch-btn.is-dimmed,
.ops-offline-switch-btn:disabled {
  opacity: 0.42;
  background: #334155;
  border-color: #475569;
  color: #cbd5e1;
  cursor: not-allowed;
}

.ops-find-server-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 12px;
  border-radius: var(--ops-radius-sm);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid #fbbf24;
  background: rgba(245, 158, 11, 0.16);
  color: #fde68a;
  transition: background-color 150ms ease;
}

.ops-find-server-btn:hover {
  background: rgba(245, 158, 11, 0.28);
}

/* Main Container */
.ops-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 16px 72px;
}

/* Buttons (9 Interactive States & Clear Hierarchy) */
.ops-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  padding: 9px 16px;
  border-radius: var(--ops-radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  user-select: none;
  transition: background-color 140ms ease, border-color 140ms ease, transform 120ms ease, opacity 140ms ease;
}

.ops-btn:active:not(:disabled) {
  transform: scale(0.985);
}

.ops-btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.ops-btn-sm {
  min-height: 38px;
  padding: 6px 12px;
  font-size: 13px;
}

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

.ops-btn-success {
  background: var(--ops-success);
  color: #ffffff;
  border-color: var(--ops-success);
}
.ops-btn-success:hover:not(:disabled) {
  background: #065f46;
}

.ops-btn-secondary {
  background: #ffffff;
  color: var(--ops-ink);
  border-color: var(--ops-border-strong);
}
.ops-btn-secondary:hover:not(:disabled) {
  background: var(--ops-surface-hover);
}

.ops-btn-ghost {
  background: transparent;
  color: var(--ops-ink-secondary);
  border-color: transparent;
}
.ops-btn-ghost:hover:not(:disabled) {
  background: var(--ops-surface-hover);
}

.ops-btn-danger {
  background: var(--ops-danger-bg);
  color: var(--ops-danger);
  border-color: var(--ops-danger-border);
}
.ops-btn-danger:hover:not(:disabled) {
  background: #fee2e2;
}

/* Cards & Surfaces */
.ops-card {
  background: var(--ops-surface);
  border: 1px solid var(--ops-border);
  border-radius: var(--ops-radius-md);
  box-shadow: var(--ops-shadow-sm);
  padding: 16px;
}

.ops-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.ops-card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--ops-ink);
}

.ops-card-sub {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--ops-ink-muted);
}

/* KPI Grid */
.ops-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.ops-kpi-card {
  background: var(--ops-surface);
  border: 1px solid var(--ops-border);
  border-radius: var(--ops-radius-md);
  padding: 12px 14px;
  box-shadow: var(--ops-shadow-sm);
}

.ops-kpi-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ops-ink-muted);
  margin-bottom: 4px;
}

.ops-kpi-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--ops-ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.ops-kpi-meta {
  font-size: 12px;
  color: var(--ops-ink-muted);
  margin-top: 4px;
}

/* Segmented Tabs */
.ops-tabs {
  display: flex;
  gap: 6px;
  background: #e2e8f0;
  padding: 4px;
  border-radius: 10px;
  overflow-x: auto;
  margin-bottom: 16px;
}

.ops-tab {
  flex: 1 1 auto;
  min-height: 42px;
  padding: 8px 14px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--ops-ink-secondary);
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.ops-tab.active {
  background: #ffffff;
  color: var(--ops-primary);
  box-shadow: var(--ops-shadow-sm);
}

/* Semantic Badges */
.ops-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
}

.ops-badge-success {
  background: var(--ops-success-bg);
  color: var(--ops-success);
  border: 1px solid var(--ops-success-border);
}

.ops-badge-primary {
  background: var(--ops-primary-soft);
  color: var(--ops-primary);
  border: 1px solid var(--ops-primary-border);
}

.ops-badge-warning {
  background: var(--ops-warning-bg);
  color: var(--ops-warning);
  border: 1px solid var(--ops-warning-border);
}

.ops-badge-danger {
  background: var(--ops-danger-bg);
  color: var(--ops-danger);
  border: 1px solid var(--ops-danger-border);
}

.ops-badge-neutral {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
}

/* Forms & Inputs */
.ops-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
}

.ops-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--ops-ink-secondary);
}

.ops-input,
.ops-select,
.ops-textarea {
  width: 100%;
  min-height: 44px;
  padding: 9px 12px;
  border-radius: var(--ops-radius-sm);
  border: 1px solid var(--ops-border-strong);
  background: #ffffff;
  color: var(--ops-ink);
  font-family: inherit;
  font-size: 15px;
}

.ops-input:focus,
.ops-select:focus,
.ops-textarea:focus {
  border-color: var(--ops-primary);
}

/* Read-only / RBAC Banner */
.ops-rbac-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--ops-radius-md);
  margin-bottom: 14px;
  background: var(--ops-warning-bg);
  border: 1px solid var(--ops-warning-border);
  color: #92400e;
  font-size: 13.5px;
  font-weight: 600;
}

/* Login Gate Card inside Operational Apps */
.ops-auth-card {
  max-width: 460px;
  margin: 28px auto;
  background: #ffffff;
  border: 1px solid var(--ops-border);
  border-radius: var(--ops-radius-lg);
  box-shadow: var(--ops-shadow-md);
  padding: 24px 20px;
}

.ops-pin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0 16px;
}

.ops-pin-btn {
  min-height: 50px;
  border-radius: 10px;
  border: 1px solid var(--ops-border-strong);
  background: var(--ops-surface-muted);
  color: var(--ops-ink);
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
}

.ops-pin-btn:active {
  background: #e2e8f0;
}

/* Empty State */
.ops-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--ops-ink-muted);
  background: var(--ops-surface-muted);
  border: 1px dashed var(--ops-border-strong);
  border-radius: var(--ops-radius-md);
}

/* Toast Notification */
.ops-toast-host {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  width: min(92vw, 420px);
}

.ops-toast {
  background: #0f172a;
  color: #ffffff;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: var(--ops-shadow-lg);
  border-left: 4px solid #38bdf8;
}
.ops-toast.is-error {
  border-left-color: #ef4444;
}
.ops-toast.is-success {
  border-left-color: #10b981;
}

/* Modal Backdrop */
.ops-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.ops-modal {
  background: #ffffff;
  border-radius: var(--ops-radius-lg);
  width: min(100%, 520px);
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
  box-shadow: var(--ops-shadow-lg);
  border: 1px solid var(--ops-border);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (max-width: 640px) {
  .ops-topbar {
    padding: 8px 12px;
  }
  .ops-container {
    padding: 12px 12px 80px;
  }
  .ops-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}