/* ============================================================
   PDF annotation layer — toolbar + ink/sticky-note overlays
   Class prefix: pann-  (kept clear of rebrand.css catch-alls:
   no "chip"/"glow"/"breathe"/"aurora"/"plan-badge"/"recall-"/"chat-msg"/"srs-")
   ============================================================ */

/* ---------- toolbar strip (first child of #pdf-view) ---------- */
#pann-toolbar {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  background: var(--dash-surface, #ffffff);
  border-bottom: 1px solid var(--dash-line, #e5e7eb);
  color: var(--dash-ink-2, #374151);
  user-select: none;
}
#pdf-view.has-pdf #pann-toolbar { display: flex; }

#pann-toolbar .pann-tools,
#pann-toolbar .pann-acts,
#pann-toolbar .pann-colors,
#pann-toolbar .pann-sizes {
  display: flex;
  align-items: center;
  gap: 4px;
}
#pann-toolbar .pann-spacer { flex: 1 1 auto; }

#pann-toolbar .pann-sep {
  width: 1px;
  height: 20px;
  background: var(--dash-line, #e5e7eb);
  margin: 0 3px;
  flex: 0 0 auto;
}

#pann-toolbar .pann-btn {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  padding: 0;
  transition: background .15s ease, color .15s ease;
}
#pann-toolbar .pann-btn:hover { background: var(--dash-teal-soft, rgba(13, 148, 136, .09)); }
#pann-toolbar .pann-btn.is-active {
  background: var(--dash-teal-soft, rgba(13, 148, 136, .12));
  color: var(--dash-teal-dark, #0d9488);
  box-shadow: inset 0 0 0 1px var(--dash-teal, rgba(13, 148, 136, .45));
}
#pann-toolbar svg { width: 15px; height: 15px; }

#pann-toolbar .pann-swatch {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c, #111827);
  cursor: pointer;
  padding: 0;
  transition: transform .12s ease;
}
#pann-toolbar .pann-swatch:hover { transform: scale(1.12); }
#pann-toolbar .pann-swatch.is-active {
  box-shadow: 0 0 0 2px var(--dash-surface, #ffffff), 0 0 0 3.5px var(--dash-teal-dark, #0d9488);
}

#pann-toolbar .pann-size {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  color: inherit;
}
#pann-toolbar .pann-size span {
  display: block;
  border-radius: 50%;
  background: currentColor;
}
#pann-toolbar .pann-size.is-active {
  background: var(--dash-teal-soft, rgba(13, 148, 136, .12));
  color: var(--dash-teal-dark, #0d9488);
}

/* ---------- cloud status badge ---------- */
#pann-toolbar .pann-cloud {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  white-space: nowrap;
  background: var(--dash-teal-soft, rgba(13, 148, 136, .1));
  color: var(--dash-teal-dark, #0d9488);
}
#pann-toolbar .pann-cloud svg { width: 13px; height: 13px; }
#pann-toolbar .pann-cloud.is-busy { animation: pann-pulse 1.1s ease-in-out infinite; }
#pann-toolbar .pann-cloud.is-off {
  background: rgba(148, 163, 184, .16);
  color: #64748b;
}
@keyframes pann-pulse {
  50% { opacity: .45; }
}

/* ---------- per-page overlay ---------- */
.pdf-viewer .pdf-page .pann-layer {
  position: absolute;
  inset: 0;
  pointer-events: none; /* select mode: text selection + AI popup stay live */
  z-index: 2;
}
.pdf-viewer .pdf-page.pann-drawing .pann-layer { pointer-events: auto; }

.pdf-viewer .pdf-page .pann-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  mix-blend-mode: multiply;
}
.pdf-viewer .pdf-page.pann-drawing .pann-canvas { cursor: crosshair; }
.pdf-viewer .pdf-page.pann-erasing .pann-canvas { cursor: cell; }
.pdf-viewer .pdf-page.pann-noting .pann-canvas { cursor: copy; }

/* ---------- sticky note pins ---------- */
.pdf-viewer .pdf-page .pann-pins {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.pdf-viewer .pdf-page .pann-pin {
  position: absolute;
  transform: translate(-50%, -110%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 8px 8px 8px 2px;
  background: var(--c, #f59e0b);
  color: #1f2937;
  cursor: pointer;
  padding: 0;
  pointer-events: auto;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .28);
  transition: transform .12s ease;
}
.pdf-viewer .pdf-page .pann-pin:hover { transform: translate(-50%, -110%) scale(1.1); }
.pdf-viewer .pdf-page .pann-pin svg { width: 14px; height: 14px; }

/* ---------- note editor card ---------- */
.pdf-viewer .pdf-page .pann-note-editor {
  position: absolute;
  width: 232px;
  background: var(--dash-surface, #ffffff);
  border: 1px solid var(--dash-line, #e5e7eb);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .3);
  z-index: 10;
  pointer-events: auto;
}
.pdf-viewer .pdf-page .pann-note-editor textarea {
  width: 100%;
  min-height: 76px;
  resize: vertical;
  border: 1px solid var(--dash-line, #e5e7eb);
  border-radius: 8px;
  background: var(--dash-canvas, #f8fafc);
  color: var(--dash-ink, #111827);
  font: inherit;
  font-size: .8rem;
  line-height: 1.45;
  padding: 8px 9px;
  outline: none;
  box-sizing: border-box;
}
.pdf-viewer .pdf-page .pann-note-editor textarea:focus {
  border-color: var(--dash-teal-dark, #0d9488);
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-colors {
  display: flex;
  gap: 5px;
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-color {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c, #f59e0b);
  cursor: pointer;
  padding: 0;
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-color.is-active {
  box-shadow: 0 0 0 2px var(--dash-surface, #ffffff), 0 0 0 3.5px var(--dash-teal-dark, #0d9488);
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-actions {
  display: flex;
  gap: 5px;
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-btn {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  padding: 0;
  background: var(--dash-teal-soft, rgba(13, 148, 136, .1));
  color: var(--dash-teal-dark, #0d9488);
}
.pdf-viewer .pdf-page .pann-note-editor .pann-note-btn svg { width: 14px; height: 14px; }
.pdf-viewer .pdf-page .pann-note-editor .pann-note-btn.pann-note-del {
  background: rgba(225, 29, 72, .1);
  color: #e11d48;
}

/* ---------- per-page whiteboard button ---------- */
.pdf-viewer .pdf-page .pann-wb-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, .92);
  color: #475569;
  cursor: pointer;
  padding: 0;
  pointer-events: auto;
  z-index: 3;
  opacity: .72;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .2);
  transition: opacity .12s ease, background .12s ease, color .12s ease;
}
.pdf-viewer .pdf-page:hover .pann-wb-btn { opacity: 1; }
.pdf-viewer .pdf-page .pann-wb-btn svg { width: 15px; height: 15px; }
.pdf-viewer .pdf-page .pann-wb-btn.is-set {
  background: var(--dash-teal-dark, #0d9488);
  color: #ffffff;
  opacity: 1;
}

/* ---------- whiteboard slide overlay ---------- */
.pann-wb {
  position: fixed;
  inset: 0;
  z-index: 4000;
  background: rgba(15, 23, 42, .58);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.pann-wb-card {
  display: flex;
  flex-direction: column;
  width: min(1100px, 96vw);
  height: min(94vh, 1000px);
  background: var(--dash-surface, #ffffff);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}
.pann-wb-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px 10px 16px;
  border-bottom: 1px solid var(--dash-line, #e5e7eb);
}
.pann-wb-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--dash-ink, #111827);
  min-width: 0;
}
.pann-wb-title svg { width: 17px; height: 17px; color: var(--dash-teal-dark, #0d9488); }
.pann-wb-title em {
  font-style: normal;
  font-weight: 500;
  font-size: .74rem;
  color: #64748b;
  white-space: nowrap;
}
.pann-wb-tools {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  padding: 8px 12px;
  border-bottom: 1px solid var(--dash-line, #e5e7eb);
  color: var(--dash-ink-2, #374151);
  user-select: none;
}
.pann-wb .pann-btn {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  padding: 0;
  transition: background .15s ease, color .15s ease;
}
.pann-wb .pann-btn:hover { background: var(--dash-teal-soft, rgba(13, 148, 136, .09)); }
.pann-wb .pann-btn.is-active {
  background: var(--dash-teal-soft, rgba(13, 148, 136, .12));
  color: var(--dash-teal-dark, #0d9488);
  box-shadow: inset 0 0 0 1px var(--dash-teal, rgba(13, 148, 136, .45));
}
.pann-wb .pann-btn svg { width: 15px; height: 15px; }
.pann-wb .pann-sep {
  width: 1px;
  height: 20px;
  background: var(--dash-line, #e5e7eb);
  margin: 0 3px;
  flex: 0 0 auto;
}
.pann-wb .pann-wb-colors,
.pann-wb .pann-wb-sizes {
  display: flex;
  align-items: center;
  gap: 4px;
}
.pann-wb .pann-swatch {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c, #111827);
  cursor: pointer;
  padding: 0;
  transition: transform .12s ease;
}
.pann-wb .pann-swatch:hover { transform: scale(1.12); }
.pann-wb .pann-swatch.is-active {
  box-shadow: 0 0 0 2px var(--dash-surface, #ffffff), 0 0 0 3.5px var(--dash-teal-dark, #0d9488);
}
.pann-wb .pann-size {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  color: inherit;
}
.pann-wb .pann-size span {
  display: block;
  border-radius: 50%;
  background: currentColor;
}
.pann-wb .pann-size.is-active {
  background: var(--dash-teal-soft, rgba(13, 148, 136, .12));
  color: var(--dash-teal-dark, #0d9488);
}
.pann-wb-stage {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  background: var(--dash-canvas, #f8fafc);
}
.pann-wb-canvas {
  display: block;
  flex: 0 0 auto;
  background: #ffffff;
  border: 1px solid var(--dash-line, #e5e7eb);
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .08);
  touch-action: none;
  cursor: crosshair;
}
.pann-wb-hint {
  padding: 8px 16px 12px;
  font-size: .72rem;
  color: #64748b;
}

/* ---------- whiteboard text editor card ---------- */
.pann-wb-edit {
  position: absolute;
  z-index: 5;
  width: 248px;
  background: var(--dash-surface, #ffffff);
  border: 1px solid var(--dash-line, #e5e7eb);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .3);
}
.pann-wb-edit textarea {
  width: 100%;
  min-height: 64px;
  resize: vertical;
  border: 1px solid var(--dash-line, #e5e7eb);
  border-radius: 8px;
  background: var(--dash-canvas, #f8fafc);
  color: var(--dash-ink, #111827);
  font: inherit;
  font-size: .8rem;
  line-height: 1.45;
  padding: 8px 9px;
  outline: none;
  box-sizing: border-box;
}
.pann-wb-edit textarea:focus {
  border-color: var(--dash-teal-dark, #0d9488);
}
.pann-wb-edit .pann-note-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}
.pann-wb-edit .pann-wb-edit-colors {
  display: flex;
  gap: 5px;
}
.pann-wb-edit .pann-note-color {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c, #111827);
  cursor: pointer;
  padding: 0;
}
.pann-wb-edit .pann-note-color.is-active {
  box-shadow: 0 0 0 2px var(--dash-surface, #ffffff), 0 0 0 3.5px var(--dash-teal-dark, #0d9488);
}
.pann-wb-edit .pann-note-actions {
  display: flex;
  gap: 5px;
}
.pann-wb-edit .pann-note-btn {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  padding: 0;
  background: var(--dash-teal-soft, rgba(13, 148, 136, .1));
  color: var(--dash-teal-dark, #0d9488);
}
.pann-wb-edit .pann-note-btn svg { width: 14px; height: 14px; }
.pann-wb-edit .pann-note-btn.pann-note-del {
  background: rgba(225, 29, 72, .1);
  color: #e11d48;
}

/* ---------- small screens: let the toolbar wrap ---------- */
@media (max-width: 900px) {
  #pann-toolbar { flex-wrap: wrap; }
  #pann-toolbar .pann-spacer { display: none; }
}