/* ===== Interactive PDF reader — menu theme ===== */
.pdf-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 16px;
  background: rgba(29, 29, 31, 0.45);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}

.pdf-viewer-overlay.no-blur {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(29, 29, 31, 0.65);
}

.pdf-viewer-overlay[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.pdf-viewer-shell {
  display: flex;
  flex-direction: column;
  width: min(1280px, 100%);
  max-height: calc(100vh - 32px);
  background: var(--bg-window);
  border: 1px solid var(--border);
  box-shadow: none;
  overflow: hidden;
  transform: scale(0.97) translateY(8px);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.pdf-viewer-overlay[aria-hidden="false"] .pdf-viewer-shell {
  transform: scale(1) translateY(0);
}

.pdf-viewer-titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--menu-bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.pdf-viewer-traffic {
  display: flex;
  gap: 7px;
  flex-shrink: 0;
}

.pdf-viewer-close {
  width: 12px;
  height: 12px;
  border: 1px solid var(--border);
  background: var(--text);
  cursor: pointer;
  padding: 0;
  transition: background 0.12s;
}

.pdf-viewer-close:hover {
  background: var(--text-muted);
}

.pdf-viewer-title {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.pdf-viewer-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.pdf-viewer-tool {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 8px 12px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.pdf-viewer-tool:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.pdf-viewer-tool.active {
  background: var(--text);
  color: var(--bg-window);
  border-color: var(--text);
}

.pdf-viewer-tool--tour.pdf-viewer-tool--playing {
  background: var(--accent-fill-strong);
  color: var(--text);
  border-color: var(--text);
}

.pdf-viewer-zoom {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
}

.pdf-viewer-zoom button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  cursor: pointer;
  font-size: var(--text-base);
  line-height: 1;
  color: var(--text);
}

.pdf-viewer-body {
  display: grid;
  grid-template-columns: 220px 1fr 380px;
  flex: 1;
  min-height: 0;
}

.pdf-viewer-nav {
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 10px;
  background: var(--surface-muted);
}

.pdf-viewer-nav-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0 0 10px 6px;
}

.pdf-viewer-nav-item {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: 10px 12px;
  margin-bottom: 4px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  line-height: 1.35;
}

.pdf-viewer-nav-item-title {
  display: block;
  font-weight: 500;
}

.pdf-viewer-nav-lead {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1.35;
}

.pdf-viewer-nav-item.active .pdf-viewer-nav-item-title {
  font-weight: 600;
}

.pdf-viewer-nav-item:hover {
  background: var(--accent-fill);
}

.pdf-viewer-nav-item.active {
  background: var(--accent-fill-strong);
  border-color: var(--border);
  font-weight: 600;
}

.pdf-viewer-math-nav {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.pdf-viewer-math-item {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: 8px 12px;
  margin-bottom: 3px;
  border: none;
  background: transparent;
  color: var(--pixel-accent);
  cursor: pointer;
  transition: background 0.12s;
}

.pdf-viewer-math-item:hover,
.pdf-viewer-math-item.active {
  background: var(--accent-fill);
  font-weight: 600;
}

.pdf-viewer-canvas-wrap {
  position: relative;
  overflow: auto;
  background: #525659;
  min-height: 0;
}

.pdf-viewer-pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 20px 16px 32px;
}

.pdf-viewer-page {
  position: relative;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  background: #fff;
}

.pdf-viewer-page canvas {
  display: block;
  vertical-align: top;
}

.pdf-viewer-overlay-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.pdf-viewer-text-highlight {
  position: absolute;
  background: transparent;
  box-shadow: none;
  pointer-events: none;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.pdf-viewer-text-highlight.active {
  background: var(--accent-fill-strong);
  box-shadow: 0 0 0 1px var(--border);
}

.pdf-viewer-text-pin {
  position: absolute;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  background: var(--accent-fill-strong);
  pointer-events: none;
  transition: background 0.3s, transform 0.3s, opacity 0.3s;
  opacity: 0.35;
}

.pdf-viewer-text-pin.active {
  background: var(--text);
  opacity: 1;
  transform: scale(1.35);
}

.pdf-viewer-bubble-layer,
.pdf-viewer-page-bubble,
.pdf-viewer-page-bubble-body,
.pdf-viewer-hotspots,
.pdf-viewer-hotspot,
.pdf-viewer-float-bubble {
  display: none !important;
}

.pdf-viewer-bubble-text .rich-text-inline,
.pdf-viewer-side-panel .rich-text-inline {
  display: inline;
}

.pdf-viewer-bubble-text .rich-text-display,
.pdf-viewer-finance-body .rich-text-display {
  display: block;
  margin: 8px 0;
}

.pdf-viewer-finance-note strong {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pixel-accent);
  margin-bottom: 6px;
}

.pdf-viewer-finance-body {
  font-size: var(--text-sm);
  line-height: 1.55;
}

.rich-text-inline .katex {
  font-size: 1em;
}

.publication-abstract .rich-text-inline,
.publication-abstract .katex {
  font-size: 0.95em;
}

.publication-abstract .rich-text-display {
  margin: 8px 0;
}

.pdf-viewer-side {
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg-panel);
}

.pdf-viewer-side-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.pdf-viewer-side-tab {
  flex: 1;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 10px 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.pdf-viewer-side-tab.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.pdf-viewer-side-panel {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: none;
}

.pdf-viewer-side-panel.active {
  display: block;
}

.pdf-viewer-guide-step {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.pdf-viewer-guide-lead {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.45;
}

.pdf-viewer-component-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.pdf-viewer-bubble-text {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0 0 14px;
}

.pdf-viewer-takeaway {
  padding: 10px 12px;
  margin-bottom: 14px;
  background: var(--accent-fill);
  border-left: 3px solid var(--text);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.pdf-viewer-takeaway-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: 6px;
}

.pdf-viewer-viz-box[hidden] {
  display: none;
}

.pdf-viewer-viz-box {
  border: 1px solid var(--border-strong);
  overflow: hidden;
  background: var(--surface-raised);
  margin-top: 4px;
}

.pdf-viewer-viz-box-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--menu-bg);
  border-bottom: 1px solid var(--border);
}

.pdf-viewer-viz-box-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.pdf-viewer-viz-reset {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 4px 8px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  cursor: pointer;
}

.pdf-viewer-viz-reset:hover {
  color: var(--text);
  border-color: var(--text);
}

.pdf-viewer-viz3d {
  width: 100%;
  height: 240px;
  min-height: 200px;
  display: block;
  pointer-events: none;
  background: linear-gradient(180deg, #cce5fc 0%, #e8f4fd 45%, #f5faff 100%);
}

.pdf-viewer-viz3d canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.pdf-viewer-viz-hint {
  margin: 0;
  padding: 6px 12px 10px;
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: center;
}

.pdf-viewer-viz,
.pdf-viewer-viz svg {
  display: none;
}

.pdf-viewer-math-block {
  padding: 14px;
  background: var(--accent-fill);
  border: 1px solid var(--border);
  margin-bottom: 14px;
  overflow-x: auto;
}

.pdf-viewer-math-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.pdf-viewer-finance-note {
  padding: 12px 14px;
  background: var(--accent-fill);
  border-left: 3px solid var(--text);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--text);
}

.pdf-viewer-finance-note strong {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pixel-accent);
  margin-bottom: 6px;
}

.pdf-viewer-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #fff;
  font-size: var(--text-sm);
  gap: 10px;
}

.pdf-viewer-loading::before {
  content: "";
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  animation: pdf-spin 0.7s linear infinite;
}

@keyframes pdf-spin {
  to { transform: rotate(360deg); }
}

.pdf-viewer-error {
  padding: 24px;
  text-align: center;
  color: #fff;
  font-size: var(--text-sm);
}

.publication-open-reader {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 8px 14px;
  border: 1px solid var(--text);
  background: var(--text);
  color: var(--bg-main);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.publication-open-reader:hover {
  background: transparent;
  color: var(--text);
}

.publication-footer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

@media (max-width: 960px) {
  .pdf-viewer-body {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }

  .pdf-viewer-nav {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 140px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-content: flex-start;
  }

  .pdf-viewer-nav-title,
  .pdf-viewer-math-nav {
    display: none;
  }

  .pdf-viewer-nav-item {
    width: auto;
    flex: 0 1 auto;
    margin: 0;
    padding: 6px 10px;
    font-size: var(--text-sm);
  }

  .pdf-viewer-side {
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 240px;
  }
}

@media (max-width: 600px) {
  .pdf-viewer-shell {
    width: 100vw;
    max-width: 100vw;
    height: 100dvh;
    max-height: 100dvh;
    border-radius: 0;
  }

  .pdf-viewer-side {
    max-height: 38vh;
  }
}