/* ===== co-located from css/styles.css (core: page-tabs) ===== */
/* ─── 8. FACE TABS ────────────────────────────────────────────── */

.face-tabs {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
}

.face-tab {
  padding: 10px 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-faint);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  font-family: 'DM Sans', sans-serif;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.face-tab:hover {
  color: var(--text-dim);
}

.face-tab.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ─── PAGE TABS BAR ──────────────────────────────────────────── */

.page-tabs-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 36px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  z-index: 130;            /* above the video-editor timeline (z 110) so the Add-page menu pops over it */
  padding: 0 8px;
  gap: 4px;
}

.page-tab {
  padding: 6px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 92px;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  font-family: 'DM Sans', sans-serif;
}

.page-tab:hover {
  background: var(--surface2);
  color: var(--text);
}

.page-tab:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-tab.active {
  background: var(--surface2);
  color: var(--gold);
  border-color: var(--border);
  font-weight: 600;
}

.page-tab-add {
  width: 28px;
  height: 28px;
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: var(--r-sm);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.page-tab-add:hover {
  background: var(--surface2);
  color: var(--gold);
  border-color: var(--gold);
}

/* Add-page hover menu — one-click create Single / Infinite / Slide / Video (opens upward, animated) */
.page-add-wrap { position: relative; display: inline-flex; flex-shrink: 0; }
.page-add-menu {
  position: absolute;
  bottom: calc(100% + 7px);
  right: -3px;            /* anchored to the button's right edge → never slides off-screen */
  left: auto;
  transform: translateY(5px);
  display: flex;
  flex-direction: row;
  gap: 1px;
  padding: 3px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--r-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
  z-index: 999;
}
.page-add-wrap.open .page-add-menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.page-add-menu::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 12px;            /* pointer sits over the + button */
  border: 5px solid transparent;
  border-top-color: var(--surface2);
}
.page-add-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 46px;
  padding: 6px 2px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  color: var(--text-dim);
  font-size: 9.5px;
  font-weight: 500;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.page-add-item:hover { background: var(--surface3); color: var(--text); border-color: var(--border2); }
.page-add-item svg { width: 15px; height: 15px; flex: none; }

.page-tab-preview {
  margin-left: auto;
  padding: 5px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  font-family: 'DM Sans', sans-serif;
}

.page-tab-preview:hover {
  background: var(--surface2);
  color: var(--text);
}

/* ── Page Group System ───────────────────────────────────────── */
.pg-tab-preview-popover {
  position: fixed;
  left: 0;
  top: 0;
  width: 174px;
  padding: 7px;
  border-radius: var(--r-lg);
  background: rgba(19, 19, 22, 0.96);
  border: 1px solid var(--border);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px) scale(0.98);
  transition: opacity 0.14s ease, transform 0.14s ease;
  z-index: 9500;
}

.pg-tab-preview-popover.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.pg-tab-preview-stage {
  position: relative;
  width: 151px;
  height: 92px;
  border-radius: var(--r-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
}

.pg-tab-preview-stage::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(transparent, rgba(0, 0, 0, 0.03)),
    radial-gradient(circle at top, rgba(255, 255, 255, 0.12), transparent 58%);
  pointer-events: none;
}

.pg-tab-preview-popover.is-loading .pg-tab-preview-stage::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 20%, rgba(255,255,255,0.12) 50%, transparent 80%);
  animation: pgTabPreviewSweep 1.05s linear infinite;
}

.pg-tab-preview-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 1;
}

.pg-tab-preview-caption {
  padding: 6px 1px 1px;
}

.pg-tab-preview-label {
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pg-tab-preview-meta {
  margin-top: 3px;
  color: var(--text-dim);
  font-size: 9px;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-tab.pg-selected {
  background: rgba(255, 255, 255, 0.12);   /* neutral lifted chip — modern, reads "picked" without the murky volt-over-dark green tint */
  color: var(--gold);                      /* volt used only as saturated TEXT (clean yellow, never a pale green fill) */
  font-weight: 600;
}

/* Quick-switch flash animation */
.page-tab.pg-flash {
  animation: pgFlash 0.4s ease-out;
}

/* Quick-nav button */
.pg-quicknav-btn {
  width: 28px;
  height: 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s ease;
  margin-right: 2px;
}

.pg-quicknav-btn:hover {
  background: var(--surface2);
  color: var(--gold);
  border-color: var(--gold);
}

/* Quick-nav dropdown */
.pg-quicknav-dropdown {
  position: fixed;
  z-index: 9200;
  width: 240px;
  max-height: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: 0 12px 36px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  visibility: hidden;
  font-family: 'DM Sans', sans-serif;
}

.pg-qnav-search-wrap {
  padding: 8px 10px 6px;
  border-bottom: 1px solid var(--border);
}

.pg-qnav-search {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 12px;
  padding: 7px 10px;
  outline: none;
  font-family: 'DM Sans', sans-serif;
  transition: border-color 0.15s;
}

.pg-qnav-search:focus {
  border-color: var(--gold);
}

.pg-qnav-content {
  overflow-y: auto;
  padding: 6px 0;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}

.pg-qnav-content:hover {
  scrollbar-color: var(--gold) transparent;
}

.pg-qnav-content::-webkit-scrollbar {
  width: 4px;
}

.pg-qnav-content::-webkit-scrollbar-track {
  background: transparent;
}

.pg-qnav-content::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: var(--r-xs);
}

.pg-qnav-content:hover::-webkit-scrollbar-thumb {
  background: var(--gold);
}

.pg-qnav-group-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  transition: background 0.12s;
}

.pg-qnav-group-header:hover {
  background: var(--surface2);
}

.pg-qnav-chevron {
  font-size: 9px;
  color: var(--text-dim);
  width: 10px;
  text-align: center;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.pg-qnav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pg-qnav-group-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pg-qnav-group-count {
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 400;
}

.pg-qnav-section-label {
  font-size: 10px;
  color: var(--text-dim);
  padding: 10px 12px 4px;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.pg-qnav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 34px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
  transition: background 0.12s;
}

.pg-qnav-item:hover {
  background: var(--surface2);
  color: var(--text);
}

.pg-qnav-item.active {
  color: var(--gold);
  font-weight: 600;
}

.pg-qnav-item-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
  opacity: 0.7;
}

.pg-qnav-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  padding: 20px 12px;
}

.page-tab.pg-grouped {
  border-bottom: 2px solid var(--pg-color, var(--border));
  padding-bottom: 0;
}

/* G2: page tag colour dots (shared/tags) */
.pg-tagdots { display: inline-flex; align-items: center; gap: 2px; margin-left: 5px; vertical-align: middle; }
.pg-tagdot { width: 7px; height: 7px; border-radius: 50%; box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3); }
/* N3: heat-map — tint a tagged tab by its first tag's colour (left accent + faint wash) */
.page-tab.pg-tagtint { background-color: color-mix(in srgb, var(--pg-tagcolor, transparent) 9%, transparent); box-shadow: inset 2px 0 0 var(--pg-tagcolor, transparent); }
/* N5: page-strip tag filter — non-matching tabs hidden */
.page-tab.pg-filtered-out { display: none; }

.pg-group-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: color-mix(in srgb, var(--pg-color, #888) 12%, var(--surface2));
  border: 1px solid color-mix(in srgb, var(--pg-color, #888) 25%, var(--border));
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
  transition: all 0.15s ease;
  user-select: none;
  flex-shrink: 0;
  font-family: 'DM Sans', sans-serif;
}

.pg-group-chip:hover {
  background: color-mix(in srgb, var(--pg-color, #888) 20%, var(--surface2));
  color: var(--text);
}

.pg-group-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pg-group-name {
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pg-group-count {
  font-size: 10px;
  opacity: 0.5;
  font-weight: 400;
}

.pg-group-chevron {
  font-size: 9px;
  opacity: 0.5;
  transition: transform 0.15s ease;
}

.pg-group-chip.collapsed .pg-group-chevron {
  transform: rotate(0deg);
}

/* Color picker */
.pg-color-picker {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: 140px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.pg-color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.12s ease;
}

.pg-color-swatch:hover {
  transform: scale(1.15);
  border-color: var(--text-dim);
}

.pg-color-swatch.active {
  border-color: #fff;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.3);
}

/* ── Page Tab Scrollbar (subtle, neutral, hover-reveal — never a bright volt bar) ── */
#page-tabs-inner { scrollbar-width: thin; scrollbar-color: transparent transparent; }

#page-tabs-inner:hover { scrollbar-color: color-mix(in srgb, var(--text-dim) 42%, transparent) transparent; }

#page-tabs-inner::-webkit-scrollbar { height: 6px; }

#page-tabs-inner::-webkit-scrollbar-track { background: transparent; }

#page-tabs-inner::-webkit-scrollbar-thumb { background: transparent; border-radius: 999px; }

#page-tabs-inner:hover::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--text-dim) 38%, transparent); }

#page-tabs-inner::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--text-dim) 58%, transparent); }

/* ── Page Tab Mode Icon (Page / Infinite / Slide / Video / Board) — neutral, never volt ── */
.pg-tab-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 6px;
  color: var(--text-dim);
  opacity: 0.9;
  flex-shrink: 0;
  vertical-align: middle;
}
.pg-tab-icon svg { width: 12px; height: 12px; }