/* ─── Design tokens ─── */
:root {
  --purple: #764edd;
  --purple-active-bg: #b6aad9;
  --purple-pill-sep: rgba(118, 78, 221, 0.15);
  --text: #15141a;
  --text-menu: #161423;
  --text-deemph: rgba(24, 14, 48, 0.7);
  --bg-box: #ffffff;
  --border-card: rgba(21, 20, 26, 0.1);
  --border-interactive: #817f84;
  --border-deemph: #b7b6ba;
  --panel-sep: rgba(24, 14, 48, 0.2);
  --shadow-l1: 0px 0.5px 0.5px rgba(0,0,0,0.15), 0px 1px 1px rgba(0,0,0,0.2);
  --shadow-l3: 0px 0.375px 1.5px rgba(0,0,0,0.05), 0px 3px 12px rgba(0,0,0,0.1);
  --shadow-panel: 0px 0.375px 1.5px rgba(0,0,0,0.02), 0px 3px 12px rgba(0,0,0,0.04);
  --shadow-menu: 0px 0px 2px rgba(0,0,0,0.1), 0px 0px 25px rgba(0,0,0,0.16);
  --r-pill: 9999px;
  --r-card: 24px;
  --r-menu: 6px;
  --r-input: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-size: 15px;
  --font-size-sm: 13px;
  --font-size-xs: 11px;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
img { display: block; }

/* ─── App shell ─── */
html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font);
  font-size: var(--font-size);
  color: var(--text);
  background: linear-gradient(160deg, #f2f0f8 0%, #e7e1f8 100%);
}

.pdf-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ─── Toolbar ─── */
.pdf-toolbar {
  height: 60px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: transparent;
  position: relative;
  z-index: 200;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

/* ─── Split button ─── */
.split-btn {
  display: flex;
  align-items: center;
  position: relative;
}

.split-main {
  border: 1px solid var(--purple);
  border-right: none;
  border-radius: var(--r-pill) 0 0 var(--r-pill);
  background: transparent;
  padding: 4px 16px;
  min-height: 32px;
  font-size: var(--font-size);
  font-weight: 600;
  color: var(--text-menu);
  white-space: nowrap;
  line-height: 1;
  transition: background 0.1s;
}
.split-main:hover { background: rgba(118, 78, 221, 0.06); }
.split-main:active { background: var(--purple-active-bg); }

.split-divider {
  width: 1px;
  height: 16px;
  background: var(--purple);
  flex-shrink: 0;
}

.split-chevron {
  border: 1px solid var(--purple);
  border-left: none;
  border-radius: 0 var(--r-pill) var(--r-pill) 0;
  background: transparent;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s;
}
.split-chevron:hover { background: rgba(118, 78, 221, 0.06); }
.split-chevron:active { background: var(--purple-active-bg); }
.split-chevron[aria-expanded="true"] { background: var(--purple-active-bg); }

/* Active state when sidebar is open (aria-expanded set by pdf-ui.js on openSidebar) */
.split-main[aria-expanded="true"] { background: var(--purple-active-bg); }

/* Small split button variant (sidebar header) */
.split-btn-sm .split-main { padding: 4px 12px; }
.split-sm {
  font-size: var(--font-size-sm);
  min-height: 28px;
}
.split-chevron-sm { padding: 6px 8px; }

/* ─── Zoom pill ─── */
.zoom-pill {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 44px;
  padding: 0 4px;
  border-radius: var(--r-card);
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 2px;
}

.pill-sep {
  width: 1px;
  height: 28px;
  background: var(--purple-pill-sep);
  flex-shrink: 0;
  margin: 0 4px;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 2px;
}

.zoom-split-wrap {
  position: relative;
}

.page-input {
  width: 56px;
  height: 32px;
  border: 1px solid var(--border-interactive);
  border-radius: var(--r-input);
  background: var(--bg-box);
  padding: 0 8px;
  font-size: var(--font-size);
  color: var(--text);
  text-align: center;
  -moz-appearance: textfield;
}
.page-input::-webkit-outer-spin-button,
.page-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.page-input:focus { outline: 2px solid var(--purple); outline-offset: 1px; }

.page-total {
  font-size: var(--font-size-sm);
  color: var(--text-menu);
  white-space: nowrap;
  padding: 0 4px;
}

/* ─── Icon button ─── */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  background: transparent;
  flex-shrink: 0;
  transition: background 0.1s;
}
.icon-btn:hover:not(:disabled) { background: rgba(0,0,0,0.06); }
.icon-btn:active:not(:disabled) { background: var(--purple-active-bg); }
.icon-btn:disabled { opacity: 0.4; cursor: default; }

.icon-btn.ghost {
  border-color: transparent;
}

/* Icon button with purple border (matches pill-btn style) */
.pill-icon-btn {
  border-color: var(--purple);
  width: 32px;
  height: 32px;
}
.pill-icon-btn:hover { background: rgba(118, 78, 221, 0.06); }
.pill-icon-btn:active { background: var(--purple-active-bg); }
.pill-icon-btn[aria-expanded="true"] { background: var(--purple-active-bg); }



/* ─── Mode toggle ─── */
.mode-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(0,0,0,0.06);
  border-radius: var(--r-pill);
  padding: 2px;
}

.mode-btn {
  border-radius: var(--r-pill);
  border-color: transparent;
}
.mode-btn:hover { background: rgba(0,0,0,0.06); }
.mode-btn.active {
  background: var(--purple-active-bg);
  border-color: transparent;
}
.mode-btn.active:hover { background: var(--purple-active-bg); }

/* ─── Pill button ─── */
.pill-btn {
  border: 1px solid var(--purple);
  border-radius: var(--r-pill);
  background: transparent;
  padding: 4px 16px;
  min-height: 32px;
  font-size: var(--font-size);
  font-weight: 600;
  color: var(--text-menu);
  white-space: nowrap;
  transition: background 0.1s;
}
.pill-btn:hover { background: rgba(118, 78, 221, 0.06); }
.pill-btn:active { background: var(--purple-active-bg); }
.pill-btn[aria-pressed="true"] {
  background: var(--purple-active-bg);
}

/* ─── Dropdown menus (frosted context menu style) ─── */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 500;
  min-width: 160px;
  padding: 5px;
  border-radius: var(--r-menu);
  background: rgba(242, 242, 242, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-menu);
  border: 0.5px solid rgba(0,0,0,0.12);
}
.zoom-dropdown { min-width: 180px; }
.manage-dropdown { min-width: 140px; }

.ctx-item {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 24px;
  padding: 4px 5px;
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 510;
  color: #4c4c4c;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.ctx-item:hover:not(.disabled) { background: rgba(0,0,0,0.08); }
.ctx-item:active:not(.disabled) { background: rgba(0,0,0,0.14); }
.ctx-item.disabled { color: #c6c6c6; cursor: default; }

.ctx-item.has-check { padding-left: 5px; }
.ctx-check { flex-shrink: 0; }
.ctx-check-space { display: inline-block; width: 12px; flex-shrink: 0; }

.ctx-sm { height: 21px; font-size: var(--font-size-xs); }

.ctx-separator {
  height: 1px;
  background: rgba(0,0,0,0.1);
  margin: 3px 5px;
}

/* ─── Panel (white rounded card, e.g. Settings, Page options) ─── */
.panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 500;
  width: 295px;
  padding: 8px;
  background: var(--bg-box);
  border: 1px solid var(--border-deemph);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.settings-panel { right: 0; }
.page-opts-panel { right: 0; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 4px 0;
  margin-bottom: 2px;
}
.panel-title {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text);
}
.panel-sep {
  height: 1px;
  background: var(--panel-sep);
  margin: 4px 0;
}
.panel-subheader {
  padding: 6px 8px 2px;
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
}

.panel-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px;
  border: 1px solid transparent;
  border-radius: 16px;
  font-size: var(--font-size-sm);
  color: var(--text-menu);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s;
  line-height: 1.2;
}
.panel-item:hover { background: rgba(0,0,0,0.05); }
.panel-item:active { background: rgba(0,0,0,0.1); }
.panel-item.active {
  background: var(--purple-active-bg);
}
.panel-item.active:hover { background: var(--purple-active-bg); }

.panel-check { flex-shrink: 0; }

/* Panel items with right chevron (nav items) */
.panel-item-nav {
  justify-content: space-between;
}
.panel-item-nav img { flex-shrink: 0; }
.panel-item-inner {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.panel-item-sub {
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
}

/* Toggle row inside panel */
.panel-toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 8px 8px;
}
.toggle-label {
  font-size: var(--font-size-sm);
  color: var(--text);
  line-height: 1.2;
}
.toggle-desc {
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
  margin-top: 2px;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  display: block;
  width: 32px;
  height: 16px;
  border-radius: 8px;
  background: #cfcfd8;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 1px;
  transition: background 0.2s;
}
.toggle-switch[aria-checked="true"] {
  background: var(--purple);
}
.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  transition: transform 0.2s;
}
.toggle-switch[aria-checked="true"] .toggle-thumb {
  transform: translateX(16px);
}

/* ─── Panel list (floating menus: Page options, Settings, Save, Scale) ─── */
/* Uses position:fixed + viewport coords set by positionMenu() in pdf-ui.js  */
.pdf-panel-list {
  position: fixed;
  z-index: 600;
  width: 295px;
  padding: 8px;
  background: var(--bg-box);
  border: 1px solid var(--border-deemph);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-menu);
  overflow: hidden;
  display: none; /* toggled by js */
}

.pdf-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 4px 0;
  margin-bottom: 2px;
}

.pdf-panel-title {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text);
}

.pdf-panel-close,
.pdf-panel-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--r-pill);
  border: none;
  background: none;
  color: var(--text-deemph);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.1s;
}
.pdf-panel-close:hover,
.pdf-panel-back:hover { background: rgba(0,0,0,0.06); }

.pdf-panel-separator {
  height: 1px;
  background: var(--panel-sep);
  margin: 4px 0;
}

.pdf-panel-subheader {
  padding: 6px 8px 2px;
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pdf-panel-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 8px;
  border: none;
  border-radius: 12px;
  font-size: var(--font-size-sm);
  color: var(--text-menu);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s;
  line-height: 1.2;
}
.pdf-panel-item:hover { background: rgba(0,0,0,0.05); }
.pdf-panel-item:active { background: rgba(0,0,0,0.1); }

.pdf-panel-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--purple);
}
/* Hide checkmark by default; show when aria-checked="true" */
.pdf-panel-item[aria-checked="false"] .pdf-panel-check svg,
.pdf-panel-item:not([aria-checked]) .pdf-panel-check svg { visibility: hidden; }
.pdf-panel-item[aria-checked="true"] .pdf-panel-check svg  { visibility: visible; }

.pdf-panel-label {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text-menu);
}

.pdf-panel-meta {
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
  flex-shrink: 0;
}

.pdf-panel-chevron {
  flex-shrink: 0;
  color: var(--text-deemph);
}

/* Toggle row (dark mode, etc.) */
.pdf-panel-toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.1s;
}
.pdf-panel-toggle-row:hover { background: rgba(0,0,0,0.05); }

.pdf-panel-label-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.pdf-panel-label-desc {
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
  line-height: 1.3;
}

/* Checkbox-based toggle switch */
.pdf-panel-toggle {
  position: relative;
  flex-shrink: 0;
  margin-top: 1px;
}
.pdf-panel-toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.pdf-panel-toggle-track {
  display: block;
  width: 32px;
  height: 16px;
  border-radius: 8px;
  background: var(--border-deemph);
  transition: background 0.2s;
  cursor: pointer;
}
.pdf-panel-toggle-track::after {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  margin: 2px;
  transition: transform 0.2s;
}
.pdf-panel-toggle input:checked ~ .pdf-panel-toggle-track {
  background: var(--purple);
}
.pdf-panel-toggle input:checked ~ .pdf-panel-toggle-track::after {
  transform: translateX(16px);
}

/* Scale current display */
.pdf-panel-scale-current {
  padding: 6px 8px 2px;
  font-size: var(--font-size-xs);
  color: var(--text-deemph);
}

/* ─── Wrappers for panel positioning ─── */
.page-actions-wrap,
.settings-wrap {
  position: relative;
}

/* ─── Content area ─── */
.pdf-content {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: stretch;
}

/* ─── PDF.js viewer fills content area ─── */
#outerContainer {
  position: absolute;
  inset: 0;
}

/* ─── Hide native pdf.js chrome — we supply our own toolbar and sidebar ─── */
/* Note: these elements must stay in the DOM because pdfjs-viewer-app.mjs    */
/* binds event listeners to many of their child IDs at init time. Removing   */
/* them would crash initialization. We hide the visual shell; our custom UI  */
/* wires directly to the pdf.js API via app.eventBus and app.pdfViewer.      */
#toolbarContainer {
  display: none !important;
}
#viewsManager {
  display: none !important;
}
#editorUndoBar {
  display: none !important;
}

/* ─── Show/hide annotations toggle ─── */
#viewerContainer.annotations-hidden .annotationLayer,
#viewerContainer.annotations-hidden .annotationEditorLayer,
#viewerContainer.annotations-hidden .canvasWrapper svg {
  display: none !important;
}

/* ─── Annotation hover affordance ─── */
/* Highlight and draw SVGs in the canvas wrapper get pointer cursor + subtle hover state */
.canvasWrapper svg.highlight,
.canvasWrapper svg.draw {
  cursor: pointer;
}
.canvasWrapper svg.highlight:hover,
.canvasWrapper svg.draw:hover {
  filter: brightness(0.82) saturate(1.3);
  transition: filter 0.12s ease;
}

/* ─── Annotate + pinned tools pill ─── */
.pdf-anno-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
/* Pill background only when pinned tools are present */
.pdf-anno-group:has(.pdf-pinned-tools:not(:empty)) {
  background: #eaddff;
  border-radius: 24px;
  padding: 4px;
  box-shadow: 0px 0px 0.5px rgba(0,0,0,0.15), 0px 1px 1px rgba(0,0,0,0.2);
}

.pdf-pinned-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}
.pdf-pinned-tools:empty { display: none; }

.pdf-tb-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-pill);
  border: 1px solid var(--purple);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.1s;
}
.pdf-tb-btn:hover { background: rgba(118,78,221,0.06); }
.pdf-tb-btn:active { background: var(--purple-active-bg); }
.pdf-tb-btn.active { background: var(--purple-active-bg); }

/* ─── Accessibility ─── */
.visuallyHidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

/* ─── Left sidebar ─── */
.pdf-sidebar {
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 12px;
  width: 293px;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  border: 1px solid var(--border-card);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-l3);
  z-index: 100;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  background: var(--bg-box);
  box-shadow: var(--shadow-l1);
  flex-shrink: 0;
  gap: 8px;
}

.sidebar-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  position: relative;
}

.sidebar-add-btn {
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text);
  background: none;
  border: 1px solid var(--border-card);
  border-radius: var(--r-pill);
  padding: 4px 12px;
  cursor: pointer;
  white-space: nowrap;
}
.sidebar-add-btn:hover { background: rgba(0,0,0,0.04); }

/* Select button in sidebar header */
.sidebar-manage-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text);
  background: var(--bg-box);
  border: 1px solid var(--border-card);
  border-radius: var(--r-pill);
  padding: 4px 10px 4px 12px;
  cursor: pointer;
  white-space: nowrap;
}
.sidebar-manage-btn:hover { background: rgba(0,0,0,0.04); }

/* ─── Sidebar body (pages + outlines) ─── */
.sidebar-body {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.sidebar-body::-webkit-scrollbar { width: 6px; }
.sidebar-body::-webkit-scrollbar-track { background: transparent; }
.sidebar-body::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }

/* ─── pdf.js v5 thumbnail overrides (inside our sidebar) ───────────────────
   pdf.js scopes ALL thumbnail CSS (and the image CSS vars) to #viewsManager.
   Since we moved #thumbnailsView out, we redeclare everything here with
   explicit values — no reliance on pdfjs-viewer.css custom properties. */

#pdfSidebarThumbs #thumbnailsView {
  --thumb-w: 126px;
  --thumb-border: 1px solid #cfcfd8;
  --thumb-shadow: 0 0 0 1px #cfcfd8, 0 1.5px 6px rgb(0 0 0 / 0.08);
  --thumb-hover-shadow: 0 0 0 1px #bfbfc9, 0 2px 8px rgb(0 0 0 / 0.12);
  --thumb-selected-shadow: 0 0 0 4px var(--purple), 0 1.5px 6px rgb(0 0 0 / 0.08);
  --thumb-badge-bg: rgba(0, 0, 0, 0.45);
  --thumb-badge-fg: #fff;
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
  padding: 20px 16px;
  gap: 20px;
  width: 100%;
  box-sizing: border-box;
}

#pdfSidebarThumbs #thumbnailsView > .thumbnail {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  position: relative;
}

#pdfSidebarThumbs #thumbnailsView > .thumbnail > input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--purple);
  margin: 0;
  flex-shrink: 0;
  cursor: pointer;
}

#pdfSidebarThumbs #thumbnailsView > .thumbnail > .thumbnailImageContainer {
  width: var(--thumb-w);
  border-radius: 8px;
  box-shadow: var(--thumb-shadow);
  position: relative;
  display: block;
  overflow: hidden;
  flex-shrink: 0;
}

#pdfSidebarThumbs #thumbnailsView > .thumbnail > .thumbnailImageContainer img {
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

/* Page number badge via pdf.js page-number attribute */
#pdfSidebarThumbs #thumbnailsView > .thumbnail > .thumbnailImageContainer::after {
  content: attr(page-number);
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  min-width: 24px;
  height: 18px;
  padding: 0 6px;
  border-radius: 9px;
  background: var(--thumb-badge-bg);
  color: var(--thumb-badge-fg);
  font-size: 11px;
  font-weight: 600;
  line-height: 18px;
  text-align: center;
  pointer-events: none;
  user-select: none;
  box-sizing: border-box;
}

#pdfSidebarThumbs #thumbnailsView > .thumbnail > .thumbnailImageContainer:hover {
  box-shadow: var(--thumb-hover-shadow);
}

/* Selected (current page) — purple ring */
#pdfSidebarThumbs #thumbnailsView > .thumbnail > .thumbnailImageContainer[aria-current="page"] {
  box-shadow: var(--thumb-selected-shadow);
}

/* ─── Outlines view ─── */
.sidebar-outlines {
  overflow-y: auto;
  padding: 12px;
}
.sidebar-outlines::-webkit-scrollbar { width: 6px; }
.sidebar-outlines::-webkit-scrollbar-track { background: transparent; }
.sidebar-outlines::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }

/* List containers */
.outline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.outline-children {
  padding-inline-start: 16px;
}

/* Each entry: row + optional children */
.outline-entry {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Row: chevron + title */
.outline-row {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 32px;
  padding: 0 4px;
  border-radius: 4px;
  cursor: default;
}
.outline-row:hover { background: rgba(21, 20, 26, 0.07); }
.outline-row.is-current {
  background: var(--purple-active-bg);
  border-radius: 8px;
}
.outline-row.is-current .outline-title { font-weight: 600; }

/* Expand/collapse chevron — button rotates, not the icon */
.outline-chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 4px;
  color: var(--text-deemph);
  transition: transform 0.15s ease;
}
.outline-chevron:hover { background: rgba(21, 20, 26, 0.1); color: var(--text); }
.outline-chevron[aria-expanded="true"] { transform: rotate(90deg); }

/* Title button */
.outline-title {
  flex: 1;
  min-width: 0;
  text-align: left;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-menu);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 4px 4px;
  border-radius: 4px;
}
.outline-title:hover { background: transparent; } /* row handles hover */

/* Level 0: 15px semibold */
.outline-level-0 > .outline-row > .outline-title { font-size: 15px; }

/* Level 1: 13px semibold — inherits defaults */

/* Level 2+: regular weight, deemphasized */
.outline-level-2 > .outline-row > .outline-title,
.outline-level-3 > .outline-row > .outline-title,
.outline-level-4 > .outline-row > .outline-title {
  font-weight: 400;
  color: var(--text-deemph);
}

/* Empty state */
.outline-empty {
  display: block;
  padding: 20px;
  font-size: var(--font-size-sm);
  color: var(--text-deemph);
  text-align: center;
}

/* ─── Annotation panel ─── */
.pdf-anno-panel {
  position: absolute;
  right: 8px;
  top: 8px;
  bottom: 8px;
  width: 290px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  border: 1px solid var(--border-card);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-l3);
  z-index: 100;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.anno-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  background: var(--bg-box);
  border-bottom: 1px solid var(--border-deemph);
  flex-shrink: 0;
}

.anno-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── Annotation tools ─── */
.anno-tools {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.anno-tool {
  border-bottom: none;
}

.anno-tool-row {
  display: flex;
  align-items: center;
  width: 100%;
  height: 64px;
  padding: 0 12px;
  background: var(--bg-box);
  border: none;
  cursor: pointer;
  text-align: left;
  box-shadow: 0px 0.5px 0px 0px rgba(0,0,0,0.08);
}

/* Hover: border on pill + light bg on icon */
.anno-tool-row:hover .anno-tool-left {
  border-color: #8f8f9d;
}
.anno-tool-row:hover .anno-icon-box {
  background: #f0f0f4;
}

/* Focus-visible: purple outline on pill */
.anno-tool-row:focus-visible .anno-tool-left {
  border-color: var(--purple);
  border-width: 2px;
}

/* Active (expanded): dark purple icon, white icon glyph */
.anno-tool[data-expanded="true"] .anno-icon-box {
  background: #3e2976;
}
.anno-tool[data-expanded="true"] .anno-icon-box img {
  filter: brightness(0) invert(1);
}

.anno-tool-left {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 8px 2px 2px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: border-color 0.1s;
}

.anno-icon-box {
  border-radius: 100px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.1s;
}

.anno-tool-label {
  font-size: var(--font-size);
  color: var(--text);
  white-space: nowrap;
}

.color-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
}

.anno-chevron {
  flex-shrink: 0;
  transition: transform 0.2s;
}
.anno-tool[data-expanded="true"] .anno-chevron {
  transform: rotate(180deg);
}

/* Annotation tool body (expanded) */
.anno-tool-body {
  background: #f2f0f8;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 12px;
  padding-bottom: 16px;
}

/* ─── Color picker area ─── */
.anno-color-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 12px;
}

.anno-color-square {
  width: 100%;
  height: 100px;
  border-radius: 8px;
  position: relative;
  cursor: crosshair;
  flex-shrink: 0;
}

.anno-color-picker-dot {
  position: absolute;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

/* ─── Slider rows ─── */
.anno-slider-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.anno-slider-label {
  font-size: 13px;
  color: var(--text);
}

.anno-slider-ctrl {
  display: flex;
  align-items: center;
  gap: 2px;
}

.anno-slider-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.anno-slider-btn:hover { background: rgba(0,0,0,0.07); }
.anno-slider-btn:active { background: rgba(0,0,0,0.12); }

/* Pill-shaped slider tracks */
.anno-hue-track,
.anno-gray-track,
.anno-alpha-track {
  flex: 1;
  height: 26px;
  border-radius: 13px;
  border: 1px solid #8f8f9d;
  position: relative;
  overflow: visible;
  cursor: pointer;
}

.anno-hue-track {
  background: linear-gradient(to right, #f90202 0%, #fefe00 18%, #00ff13 35%, #00fdff 52%, #001cff 70%, #ff00f1 86%, #ff000f 100%);
}

.anno-gray-track {
  background: linear-gradient(to right, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.6) 100%);
}

.anno-alpha-track {
  background: linear-gradient(to right, #000 0%, rgba(0,0,0,0) 100%);
}

.anno-track-thumb {
  position: absolute;
  top: -1px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
  transform: translateX(-50%);
  pointer-events: none;
}

/* ─── Tool footer (action button + pin row) ─── */
.anno-tool-footer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 12px;
}

/* ─── Action buttons ─── */
.anno-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--purple);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--purple);
  background: transparent;
  cursor: pointer;
  transition: background 0.1s;
}
.anno-action-btn:hover { background: rgba(118,78,221,0.06); }
.anno-action-btn:active { background: rgba(118,78,221,0.14); }

/* ─── Pin to toolbar ─── */
.anno-pin-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  color: var(--text);
  cursor: pointer;
}

.anno-pin-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--purple);
  flex-shrink: 0;
  cursor: pointer;
}

/* ─── Signature list ─── */
.anno-sig-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 12px;
}

.anno-sig-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 4px;
}

.anno-sig-thumb {
  width: 32px;
  height: 32px;
  background: rgba(21, 20, 26, 0.07);
  border-radius: 8px;
  padding: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.anno-sig-name {
  flex: 1;
  font-size: 15px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.anno-sig-del {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.anno-sig-del:hover { background: rgba(0,0,0,0.07); }
.anno-sig-del:active { background: rgba(0,0,0,0.12); }

/* ─── Comment cards ─── */
.anno-comment-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 12px;
  max-height: 400px;
  overflow-y: auto;
}

.anno-comment-card {
  padding: 8px 16px 16px;
  border-radius: 8px;
  border: 0.5px solid #f0f0f4;
}

.anno-comment-date {
  font-size: 13px;
  color: rgba(21,20,26,0.69);
  height: 32px;
  display: flex;
  align-items: center;
}

.anno-comment-text {
  font-size: var(--font-size);
  color: var(--text);
  line-height: 1.4;
}

/* ─── Visibility helpers ─── */
[hidden] { display: none !important; }