/* =============================================================
   BLACKNODE v3 — Command UI partial
   Wave D 2026-05-24: slash menu, Cmd+K palette, @ mentions,
   code blocks + diff renderer. Token-only colors.
   Linear/Raycast/Geist motion grammar.
   ============================================================= */

/* ============ SHARED MENU PRIMITIVE ============ */
.ag-cmenu {
  position: absolute;
  z-index: var(--bn-z-overlay);
  background: var(--bn-bg-page);
  border: 1px solid var(--bn-border);
  border-radius: var(--bn-r-md);
  box-shadow: var(--bn-shadow-lg);
  min-width: 320px;
  max-width: 480px;
  max-height: 320px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: var(--bn-font-sans);
  animation: ag-cmenu-in 140ms var(--bn-ease);
  isolation: isolate;
}
.ag-cmenu[hidden] { display: none !important; }
.ag-cmenu__hint {
  padding: 6px 12px;
  font-size: 11px;
  font-weight: var(--bn-fw-medium);
  color: var(--bn-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--bn-bg-surface-1);
  border-bottom: 1px solid var(--bn-border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bn-s-2);
}
.ag-cmenu__list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--bn-border-strong) transparent;
}
.ag-cmenu__list::-webkit-scrollbar { width: 8px; }
.ag-cmenu__list::-webkit-scrollbar-thumb {
  background: var(--bn-border-strong);
  border-radius: 4px;
}
.ag-cmenu__item {
  display: flex;
  align-items: center;
  gap: var(--bn-s-3);
  width: 100%;
  padding: 8px 10px;
  background: transparent;
  border: none;
  border-radius: var(--bn-r-sm);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: var(--bn-text-sm);
  font-weight: var(--bn-fw-medium);
  color: var(--bn-ink);
  transition: background 120ms var(--bn-ease);
  min-height: 36px;
}
.ag-cmenu__item:hover,
.ag-cmenu__item[aria-selected="true"] {
  background: var(--bn-bg-surface-2);
}
.ag-cmenu__item[aria-selected="true"] {
  outline: none;
}
.ag-cmenu__icon {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  flex-shrink: 0;
  color: var(--bn-ink-secondary);
  background: var(--bn-bg-surface-1);
  border-radius: var(--bn-r-sm);
}
.ag-cmenu__item[aria-selected="true"] .ag-cmenu__icon {
  color: var(--bn-accent);
  background: var(--bn-accent-soft);
}
.ag-cmenu__icon iconify-icon { font-size: 14px; }
.ag-cmenu__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.ag-cmenu__title {
  font-size: var(--bn-text-sm);
  font-weight: var(--bn-fw-medium);
  color: var(--bn-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex; align-items: baseline; gap: 6px;
}
.ag-cmenu__title mark {
  background: var(--bn-accent-soft);
  color: var(--bn-accent-strong);
  padding: 0 1px;
  border-radius: 2px;
}
.ag-cmenu__desc {
  font-size: 12px;
  font-weight: var(--bn-fw-regular);
  color: var(--bn-ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ag-cmenu__kbd {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 11px;
  font-family: var(--bn-font-mono);
  font-weight: var(--bn-fw-medium);
  padding: 2px 6px;
  background: linear-gradient(180deg, var(--bn-bg-surface-1), var(--bn-bg-surface-2));
  border: 1px solid var(--bn-border);
  border-radius: var(--bn-r-xs);
  color: var(--bn-ink-secondary);
  flex-shrink: 0;
}
.ag-cmenu__empty {
  padding: 20px 12px;
  text-align: center;
  font-size: var(--bn-text-sm);
  color: var(--bn-ink-muted);
}

@keyframes ag-cmenu-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============ SLASH MENU (anchored to composer) ============ */
.ag-slash-menu {
  /* Positioned by JS — bottom edge sits above the composer it was opened from. */
  width: 360px;
  max-width: calc(100vw - 32px);
}

/* ============ MENTION MENU (anchored to composer) ============ */
.ag-mention-menu {
  width: 300px;
  max-width: calc(100vw - 32px);
}
.ag-mention-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px 1px 4px;
  background: var(--bn-accent-soft);
  color: var(--bn-accent-strong);
  border-radius: var(--bn-r-sm);
  font-weight: var(--bn-fw-medium);
  font-size: 12px;
}

/* ============ CMD+K PALETTE (centered modal) ============ */
.ag-palette-root {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: max(10vh, 60px) var(--bn-s-4) var(--bn-s-4);
  background: rgba(26, 24, 21, 0.32);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--bn-z-modal);
  animation: ag-palette-fade 120ms var(--bn-ease);
}
.ag-palette-root[hidden] { display: none !important; }
.ag-palette {
  width: min(640px, 100%);
  max-height: 70vh;
  background: var(--bn-bg-page);
  border: 1px solid var(--bn-border);
  border-radius: var(--bn-r-lg);
  box-shadow: var(--bn-shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: ag-palette-in 160ms var(--bn-ease);
}
.ag-palette__search {
  display: flex;
  align-items: center;
  gap: var(--bn-s-2);
  padding: 12px 16px;
  border-bottom: 1px solid var(--bn-border-soft);
}
.ag-palette__search iconify-icon {
  font-size: 16px;
  color: var(--bn-ink-muted);
  flex-shrink: 0;
}
.ag-palette__input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font: inherit;
  font-size: var(--bn-text-base);
  color: var(--bn-ink);
  padding: 0;
  min-width: 0;
}
.ag-palette__input::placeholder { color: var(--bn-ink-muted); }
.ag-palette__esc {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  background: var(--bn-bg-surface-1);
  border: 1px solid var(--bn-border-soft);
  border-radius: var(--bn-r-xs);
  font-size: 11px;
  font-family: var(--bn-font-mono);
  color: var(--bn-ink-muted);
  flex-shrink: 0;
}
.ag-palette__list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--bn-border-strong) transparent;
}
.ag-palette__group {
  padding: 8px 12px 4px;
  font-size: 11px;
  font-weight: var(--bn-fw-semibold);
  color: var(--bn-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.ag-palette__group:not(:first-child) {
  border-top: 1px solid var(--bn-border-soft);
  margin-top: 4px;
}
.ag-palette__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-top: 1px solid var(--bn-border-soft);
  font-size: 11px;
  color: var(--bn-ink-muted);
  background: var(--bn-bg-surface-1);
  gap: var(--bn-s-3);
  flex-wrap: wrap;
}
.ag-palette__foot-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.ag-palette__empty {
  padding: 40px 16px;
  text-align: center;
  font-size: var(--bn-text-sm);
  color: var(--bn-ink-muted);
}

@keyframes ag-palette-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes ag-palette-in {
  from { opacity: 0; transform: scale(0.97) translateY(-6px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* ============ HELP OVERLAY ============ */
.ag-help-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--bn-s-5);
  margin-top: var(--bn-s-4);
}
@media (max-width: 560px) {
  .ag-help-grid { grid-template-columns: 1fr; }
}
.ag-help-section h3 {
  font-size: 11px;
  font-weight: var(--bn-fw-semibold);
  color: var(--bn-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 8px 0;
}
.ag-help-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--bn-s-3);
  padding: 6px 0;
  font-size: var(--bn-text-sm);
  color: var(--bn-ink);
  border-bottom: 1px solid var(--bn-border-soft);
}
.ag-help-row:last-child { border-bottom: none; }
.ag-help-row__kbd {
  display: inline-flex;
  gap: 2px;
}
.ag-help-row__kbd .ag-cmenu__kbd { font-size: 11px; }

/* ============ INLINE CODE BLOCK + COPY ============ */
.ag-codeblock {
  position: relative;
  margin: var(--bn-s-3) 0;
  background: var(--bn-bg-surface-2);
  border: 1px solid var(--bn-border-soft);
  border-radius: var(--bn-r-md);
  overflow: hidden;
  font-family: var(--bn-font-mono);
  font-size: 13px;
  line-height: 1.5;
}
.ag-codeblock__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bn-s-2);
  padding: 6px 10px 6px 12px;
  background: var(--bn-bg-surface-1);
  border-bottom: 1px solid var(--bn-border-soft);
  font-family: var(--bn-font-sans);
  font-size: 11px;
  font-weight: var(--bn-fw-medium);
  color: var(--bn-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ag-codeblock__lang { display: inline-flex; align-items: center; gap: 6px; }
.ag-codeblock__actions { display: inline-flex; gap: 4px; }
.ag-codeblock__btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 7px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--bn-r-xs);
  font-family: var(--bn-font-sans);
  font-size: 11px;
  font-weight: var(--bn-fw-medium);
  color: var(--bn-ink-secondary);
  cursor: pointer;
  transition: background 120ms var(--bn-ease), color 120ms var(--bn-ease), border-color 120ms var(--bn-ease);
  text-transform: none;
  letter-spacing: 0;
}
.ag-codeblock__btn:hover {
  background: var(--bn-bg-surface-2);
  color: var(--bn-ink);
  border-color: var(--bn-border-soft);
}
.ag-codeblock__btn iconify-icon { font-size: 12px; }
.ag-codeblock__btn--ok {
  color: var(--bn-success);
}
.ag-codeblock__body {
  padding: 10px 12px;
  margin: 0;
  white-space: pre;
  overflow-x: auto;
  color: var(--bn-ink);
  scrollbar-width: thin;
}

/* ============ INLINE DIFF VIEW ============ */
.ag-diff { padding: 0; }
.ag-diff__line {
  display: block;
  padding: 0 12px;
  white-space: pre;
  min-height: 1.5em;
}
.ag-diff__line--add {
  background: rgba(58, 96, 72, 0.10);
  color: var(--bn-success);
  border-left: 2px solid var(--bn-success);
  padding-left: 10px;
}
.ag-diff__line--del {
  background: rgba(176, 41, 27, 0.10);
  color: var(--bn-danger);
  border-left: 2px solid var(--bn-danger);
  padding-left: 10px;
  text-decoration: line-through;
  text-decoration-color: rgba(176, 41, 27, 0.45);
}
.ag-diff__line--hunk {
  color: var(--bn-ink-muted);
  background: var(--bn-bg-surface-1);
  font-style: italic;
}

/* ============ TOAST CONFIRM (non-blocking, paired actions) ============ */
.ag-toast--confirm {
  border: 1px solid var(--bn-border);
}
.ag-toast--confirm .ag-toast__btn + .ag-toast__btn {
  margin-left: 4px;
}

/* ============ DARK THEME OVERRIDES ============ */
[data-theme="dark"] .ag-cmenu,
[data-theme="dark"] .ag-palette {
  background: var(--bn-bg-page);
  border-color: var(--bn-border);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55), 0 8px 18px rgba(0, 0, 0, 0.35);
}
[data-theme="dark"] .ag-cmenu__hint,
[data-theme="dark"] .ag-palette__foot {
  background: var(--bn-bg-surface-1);
}
[data-theme="dark"] .ag-cmenu__item[aria-selected="true"],
[data-theme="dark"] .ag-cmenu__item:hover {
  background: var(--bn-bg-surface-2);
}
[data-theme="dark"] .ag-cmenu__kbd,
[data-theme="dark"] .ag-palette__esc {
  background: linear-gradient(180deg, var(--bn-bg-surface-2), var(--bn-bg-surface-1));
}
[data-theme="dark"] .ag-mention-pill {
  background: rgba(233, 75, 44, 0.14);
  color: #ff8e74;
}
[data-theme="dark"] .ag-cmenu__title mark {
  background: rgba(233, 75, 44, 0.18);
  color: #ff8e74;
}
[data-theme="dark"] .ag-codeblock {
  background: #0a0908;
  border-color: var(--bn-border);
}
[data-theme="dark"] .ag-codeblock__head {
  background: var(--bn-bg-surface-1);
}
[data-theme="dark"] .ag-diff__line--add {
  background: rgba(78, 168, 124, 0.12);
  color: #6fd0a3;
  border-left-color: #6fd0a3;
}
[data-theme="dark"] .ag-diff__line--del {
  background: rgba(255, 142, 116, 0.10);
  color: #ff8e74;
  border-left-color: #ff8e74;
  text-decoration-color: rgba(255, 142, 116, 0.5);
}

/* ============ ACCESSIBILITY ============ */
@media (prefers-reduced-motion: reduce) {
  .ag-cmenu,
  .ag-palette,
  .ag-palette-root { animation: none !important; }
}

/* WCAG 2.5.5 — keep target sizes >= 24px on mobile */
@media (max-width: 480px) {
  .ag-cmenu__item { min-height: 40px; }
  .ag-palette__input { font-size: 16px; /* prevent iOS zoom */ }
}