/**
 * P11 Stage 5AW-A1 — RASTAN modern UI semantic tokens and opt-in primitives.
 * Classes prefixed with .rbn-* only; does not restyle existing mgr16/mgr surfaces.
 * Brand accent bridges from theme-loader --color-primary when present.
 */
:root {
  /* Color — light (default) */
  --rbn-color-bg: #f5f6f8;
  --rbn-color-surface: #ffffff;
  --rbn-color-surface-raised: #ffffff;
  --rbn-color-text: #111827;
  --rbn-color-text-muted: #6b7280;
  --rbn-color-border: #e5e7eb;
  --rbn-color-accent: var(--color-primary, #ff6a00);
  --rbn-color-accent-hover: color-mix(in srgb, var(--rbn-color-accent) 88%, #000000);
  --rbn-color-accent-soft: color-mix(in srgb, var(--rbn-color-accent) 14%, transparent);
  --rbn-color-success: #16a34a;
  --rbn-color-warning: #d97706;
  --rbn-color-error: #dc2626;
  --rbn-color-info: #2563eb;
  --rbn-focus-ring: 2px solid var(--rbn-color-accent);

  /* Spacing (8pt grid) */
  --rbn-space-1: 4px;
  --rbn-space-2: 8px;
  --rbn-space-3: 12px;
  --rbn-space-4: 16px;
  --rbn-space-5: 24px;
  --rbn-space-6: 32px;
  --rbn-space-7: 48px;
  --rbn-space-8: 64px;

  /* Radius */
  --rbn-radius-sm: 4px;
  --rbn-radius-md: 8px;
  --rbn-radius-lg: 12px;
  --rbn-radius-xl: 16px;
  --rbn-radius-pill: 9999px;

  /* Shadow */
  --rbn-shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06);
  --rbn-shadow-md: 0 4px 12px rgba(17, 24, 39, 0.08);
  --rbn-shadow-lg: 0 12px 32px rgba(17, 24, 39, 0.12);

  /* Typography */
  --rbn-font-family: var(--font-family-sans, 'IRANSansX', 'Inter', system-ui, sans-serif);
  --rbn-font-size-xs: 0.75rem;
  --rbn-font-size-sm: 0.875rem;
  --rbn-font-size-md: 1rem;
  --rbn-font-size-lg: 1.125rem;
  --rbn-font-size-xl: 1.5rem;
  --rbn-line-height-tight: 1.25;
  --rbn-line-height-normal: 1.5;

  /* Layout */
  --rbn-touch-target: 44px;
  --rbn-shell-max-width: 1440px;
  --rbn-pane-gap: var(--rbn-space-4);
}

/* Dark theme — activated via rbn-theme-bridge.js (data-rbn-theme) */
:root[data-rbn-theme='dark'] {
  --rbn-color-bg: #0f1419;
  --rbn-color-surface: #1a1f2e;
  --rbn-color-surface-raised: #232938;
  --rbn-color-text: #f3f4f6;
  --rbn-color-text-muted: #9ca3af;
  --rbn-color-border: #374151;
  --rbn-color-accent: var(--color-primary, #63b3ff);
  --rbn-color-accent-hover: color-mix(in srgb, var(--rbn-color-accent) 85%, #ffffff);
  --rbn-color-accent-soft: color-mix(in srgb, var(--rbn-color-accent) 18%, transparent);
  --rbn-color-success: #4ade80;
  --rbn-color-warning: #fbbf24;
  --rbn-color-error: #f87171;
  --rbn-color-info: #60a5fa;
  --rbn-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --rbn-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --rbn-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
}

/* RTL/LTR direction helpers */
.rbn-dir-aware {
  margin-inline: 0;
  padding-inline: var(--rbn-space-4);
}

.rbn-ltr-field {
  direction: ltr;
  text-align: left;
}

.rbn-rtl-field {
  direction: rtl;
  text-align: right;
}

/* Shell / page */
.rbn-shell {
  max-width: var(--rbn-shell-max-width);
  margin-inline: auto;
  padding-inline: var(--rbn-space-4);
}

.rbn-page {
  display: flex;
  flex-direction: column;
  gap: var(--rbn-pane-gap);
  color: var(--rbn-color-text);
  font-family: var(--rbn-font-family);
  font-size: var(--rbn-font-size-md);
  line-height: var(--rbn-line-height-normal);
}

.rbn-page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--rbn-space-3);
  margin-block-end: var(--rbn-space-4);
}

/* Card */
.rbn-card {
  background: var(--rbn-color-surface);
  border: 1px solid var(--rbn-color-border);
  border-radius: var(--rbn-radius-lg);
  box-shadow: var(--rbn-shadow-sm);
}

.rbn-card-header {
  padding: var(--rbn-space-4);
  border-block-end: 1px solid var(--rbn-color-border);
  font-size: var(--rbn-font-size-lg);
  font-weight: 600;
}

.rbn-card-body {
  padding: var(--rbn-space-4);
}

/* Buttons */
.rbn-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--rbn-space-2);
  min-height: var(--rbn-touch-target);
  min-width: var(--rbn-touch-target);
  padding-inline: var(--rbn-space-4);
  border: 1px solid var(--rbn-color-border);
  border-radius: var(--rbn-radius-md);
  background: var(--rbn-color-surface-raised);
  color: var(--rbn-color-text);
  font-family: inherit;
  font-size: var(--rbn-font-size-sm);
  font-weight: 600;
  line-height: var(--rbn-line-height-tight);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.rbn-button:focus-visible {
  outline: var(--rbn-focus-ring);
  outline-offset: 2px;
}

.rbn-button:disabled,
.rbn-button[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
}

.rbn-button-primary {
  border-color: transparent;
  background: var(--rbn-color-accent);
  color: #ffffff;
}

.rbn-button-primary:hover:not(:disabled):not([aria-disabled='true']) {
  background: var(--rbn-color-accent-hover);
}

.rbn-button-secondary {
  background: var(--rbn-color-surface);
}

.rbn-button-danger {
  border-color: transparent;
  background: var(--rbn-color-error);
  color: #ffffff;
}

/* Fields */
.rbn-field {
  display: flex;
  flex-direction: column;
  gap: var(--rbn-space-1);
  margin-block-end: var(--rbn-space-3);
}

.rbn-field-label {
  font-size: var(--rbn-font-size-sm);
  font-weight: 600;
  color: var(--rbn-color-text);
}

.rbn-field-help {
  font-size: var(--rbn-font-size-xs);
  color: var(--rbn-color-text-muted);
}

.rbn-input,
.rbn-select,
.rbn-textarea {
  width: 100%;
  min-height: var(--rbn-touch-target);
  padding-inline: var(--rbn-space-3);
  padding-block: var(--rbn-space-2);
  border: 1px solid var(--rbn-color-border);
  border-radius: var(--rbn-radius-md);
  background: var(--rbn-color-surface);
  color: var(--rbn-color-text);
  font-family: inherit;
  font-size: var(--rbn-font-size-md);
  line-height: var(--rbn-line-height-normal);
}

.rbn-textarea {
  min-height: calc(var(--rbn-touch-target) * 2);
  resize: vertical;
}

.rbn-input:focus-visible,
.rbn-select:focus-visible,
.rbn-textarea:focus-visible {
  outline: var(--rbn-focus-ring);
  outline-offset: 1px;
  border-color: var(--rbn-color-accent);
}

.rbn-input:disabled,
.rbn-select:disabled,
.rbn-textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Tabs */
.rbn-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--rbn-space-2);
  border-block-end: 1px solid var(--rbn-color-border);
  margin-block-end: var(--rbn-space-4);
}

.rbn-tab {
  min-height: var(--rbn-touch-target);
  padding-inline: var(--rbn-space-3);
  border: none;
  border-block-end: 2px solid transparent;
  background: transparent;
  color: var(--rbn-color-text-muted);
  font-family: inherit;
  font-size: var(--rbn-font-size-sm);
  font-weight: 600;
  cursor: pointer;
}

.rbn-tab[aria-selected='true'],
.rbn-tab.rbn-tab--active {
  color: var(--rbn-color-accent);
  border-block-end-color: var(--rbn-color-accent);
}

.rbn-tab:focus-visible {
  outline: var(--rbn-focus-ring);
  outline-offset: 2px;
}

/* Table */
.rbn-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--rbn-font-size-sm);
}

.rbn-table th,
.rbn-table td {
  padding: var(--rbn-space-3);
  border-block-end: 1px solid var(--rbn-color-border);
  text-align: start;
}

.rbn-table th {
  color: var(--rbn-color-text-muted);
  font-weight: 600;
}

/* Badge / status */
.rbn-badge {
  display: inline-flex;
  align-items: center;
  padding-inline: var(--rbn-space-2);
  padding-block: 2px;
  border-radius: var(--rbn-radius-pill);
  font-size: var(--rbn-font-size-xs);
  font-weight: 600;
  background: var(--rbn-color-accent-soft);
  color: var(--rbn-color-accent);
}

.rbn-status {
  font-size: var(--rbn-font-size-sm);
  color: var(--rbn-color-text-muted);
}

.rbn-status--success {
  color: var(--rbn-color-success);
}

.rbn-status--warning {
  color: var(--rbn-color-warning);
}

.rbn-status--error {
  color: var(--rbn-color-error);
}

.rbn-status--info {
  color: var(--rbn-color-info);
}

/* Empty / loading / error */
.rbn-empty-state {
  padding: var(--rbn-space-6);
  text-align: center;
  color: var(--rbn-color-text-muted);
  border: 1px dashed var(--rbn-color-border);
  border-radius: var(--rbn-radius-lg);
  background: var(--rbn-color-surface);
}

.rbn-loading-state {
  padding: var(--rbn-space-5);
  color: var(--rbn-color-text-muted);
}

.rbn-loading-state[aria-busy='true']::after {
  content: '…';
}

.rbn-error-state {
  padding: var(--rbn-space-4);
  border: 1px solid color-mix(in srgb, var(--rbn-color-error) 40%, transparent);
  border-radius: var(--rbn-radius-md);
  background: color-mix(in srgb, var(--rbn-color-error) 8%, transparent);
  color: var(--rbn-color-error);
}

/* Overlay primitives (inert until used) */
.rbn-drawer,
.rbn-modal,
.rbn-bottom-sheet {
  display: none;
}

.rbn-drawer.rbn-drawer--open,
.rbn-modal.rbn-modal--open,
.rbn-bottom-sheet.rbn-bottom-sheet--open {
  display: block;
}

/* Checklist */
.rbn-checklist {
  display: flex;
  flex-direction: column;
  gap: var(--rbn-space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.rbn-checklist-row {
  display: flex;
  align-items: center;
  gap: var(--rbn-space-3);
  min-height: var(--rbn-touch-target);
  padding-inline: var(--rbn-space-3);
  border: 1px solid var(--rbn-color-border);
  border-radius: var(--rbn-radius-md);
  background: var(--rbn-color-surface);
}

/* Media */
.rbn-upload-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--rbn-space-2);
  min-height: calc(var(--rbn-touch-target) * 3);
  padding: var(--rbn-space-4);
  border: 1px dashed var(--rbn-color-border);
  border-radius: var(--rbn-radius-lg);
  background: var(--rbn-color-surface);
  color: var(--rbn-color-text-muted);
}

.rbn-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: var(--rbn-space-3);
}

/* Publish bar */
.rbn-publish-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--rbn-space-3);
  padding: var(--rbn-space-3) var(--rbn-space-4);
  border: 1px solid var(--rbn-color-border);
  border-radius: var(--rbn-radius-lg);
  background: var(--rbn-color-surface-raised);
  box-shadow: var(--rbn-shadow-md);
}

@media (prefers-reduced-motion: reduce) {
  .rbn-button {
    transition: none;
  }
}