/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   pdf-reader.css — PDF Intelligence Reader styles
   Extends app.css Gemstone dark palette tokens.
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* ── Section ─────────────────────────────────────────────── */

.pdf-section {
  margin-block-end: 2rem;
}

.pdf-section__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--app-text);
  margin: 0 0 1rem;
}

.pdf-section__title svg {
  color: var(--app-accent);
  flex-shrink: 0;
}

/* ── Upload zone ─────────────────────────────────────────── */

.pdf-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 3rem 2rem;
  border: 2px dashed var(--app-border);
  border-radius: var(--app-radius-lg);
  background: var(--app-surface);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  text-align: center;
}

.pdf-upload:hover,
.pdf-upload:focus-visible {
  border-color: var(--app-accent);
  background: var(--app-surface-2);
}

.pdf-upload.drag-over {
  border-color: var(--app-accent);
  background: rgb(74 122 223 / 8%);
}

.pdf-upload__icon {
  color: var(--app-text-muted);
}

.pdf-upload__text {
  font-size: 1rem;
  color: var(--app-text);
}

.pdf-upload__link {
  color: var(--app-accent);
  text-decoration: underline;
}

.pdf-upload__hint {
  font-size: 0.8rem;
  color: var(--app-text-muted);
}

/* ── Upload progress ─────────────────────────────────────── */

.pdf-upload-progress {
  margin-block-start: 1rem;
}

.pdf-upload-progress__status {
  font-size: 0.85rem;
  color: var(--app-text-muted);
  margin-block-end: 0.4rem;
}

/* ── Document list ───────────────────────────────────────── */

.pdf-doc-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.pdf-doc-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-size: 0.85rem;
}

.pdf-doc-item:hover {
  background: var(--app-surface-2);
}

.pdf-doc-item--active {
  border-color: var(--app-accent);
  background: rgb(74 122 223 / 6%);
}

.pdf-doc-item__icon {
  color: var(--app-error);
  flex-shrink: 0;
}

.pdf-doc-item__name {
  font-weight: 600;
  color: var(--app-text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pdf-doc-item__pages {
  color: var(--app-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.pdf-doc-item__hash {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.7rem;
  color: var(--app-accent);
  flex-shrink: 0;
}

/* ── Workspace layout ────────────────────────────────────── */

.pdf-workspace {
  padding-block-start: 0.5rem;
}

.pdf-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (width <= 960px) {
  .pdf-layout {
    grid-template-columns: 1fr;
  }
}

/* ── Viewer toolbar ──────────────────────────────────────── */

.pdf-viewer-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius) var(--app-radius) 0 0;
  flex-wrap: wrap;
}

.pdf-viewer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--app-border);
  color: var(--app-text);
  padding: 0.3rem 0.5rem;
  border-radius: var(--app-radius);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s, border-color 0.15s;
  min-width: 32px;
}

.pdf-viewer-btn:hover:not(:disabled) {
  background: var(--app-surface-2);
  border-color: var(--app-accent);
}

.pdf-viewer-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pdf-viewer-page-info {
  font-size: 0.85rem;
  color: var(--app-text);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.pdf-viewer-page-input {
  width: 3rem;
  padding: 0.2rem 0.3rem;
  font-size: 0.85rem;
  background: var(--app-surface-2);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  color: var(--app-text);
  text-align: center;
  outline: none;
}

.pdf-viewer-page-input:focus {
  border-color: var(--app-accent);
}

.pdf-viewer-zoom {
  font-size: 0.85rem;
  color: var(--app-text-muted);
  min-width: 3rem;
  text-align: center;
}

.pdf-viewer-sep {
  width: 1px;
  height: 18px;
  background: var(--app-border);
  margin: 0 0.25rem;
}

/* ── Canvas wrapper ──────────────────────────────────────── */

.pdf-viewer-canvas-wrap {
  position: relative;
  background: #1a1a2e;
  border: 1px solid var(--app-border);
  border-top: none;
  border-radius: 0 0 var(--app-radius) var(--app-radius);
  overflow: auto;
  min-height: 400px;
  max-height: 600px;
  display: flex;
  justify-content: center;
  padding: 1rem;
}

.pdf-viewer-canvas {
  display: block;
  max-width: 100%;
  box-shadow: 0 2px 12px rgb(0 0 0 / 40%);
}

.pdf-viewer-text-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0.25;
  line-height: 1;
  pointer-events: auto;
}

.pdf-viewer-text-layer span {
  position: absolute;
  white-space: pre;
  color: transparent;
  cursor: text;
}

.pdf-viewer-text-layer ::selection {
  background: rgb(74 122 223 / 40%);
}

.pdf-viewer-annotation-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ── Thumbnails ──────────────────────────────────────────── */

.pdf-thumbnails {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  overflow-x: auto;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-top: none;
  border-radius: 0 0 var(--app-radius) var(--app-radius);
  margin-block-start: -1px;
}

.pdf-thumb {
  flex-shrink: 0;
  width: 64px;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: 3px;
  opacity: 0.7;
  transition: opacity 0.15s, border-color 0.15s;
}

.pdf-thumb:hover {
  opacity: 1;
}

.pdf-thumb--active {
  opacity: 1;
  border-color: var(--app-accent);
}

.pdf-thumb canvas {
  display: block;
  width: 100%;
  border-radius: 2px;
}

/* ── Tabs ────────────────────────────────────────────────── */

.pdf-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--app-border);
  margin-block-end: 0;
  overflow-x: auto;
}

.pdf-tab {
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--app-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.pdf-tab:hover {
  color: var(--app-text);
}

.pdf-tab--active {
  color: var(--app-accent);
  border-bottom-color: var(--app-accent);
}

/* ── Panels ──────────────────────────────────────────────── */

.pdf-panels-col {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  overflow: hidden;
  min-height: 300px;
  display: flex;
  flex-direction: column;
}

.pdf-panel {
  display: none;
  padding: 1rem;
  flex: 1;
  overflow-y: auto;
  max-height: 500px;
}

.pdf-panel--active {
  display: flex;
  flex-direction: column;
}

.pdf-panel__toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-block-end: 0.75rem;
  flex-wrap: wrap;
}

.pdf-panel__empty {
  color: var(--app-text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 2rem 1rem;
}

.pdf-panel__desc {
  color: var(--app-text-muted);
  font-size: 0.85rem;
  margin: 0 0 0.75rem;
}

/* ── Text content ────────────────────────────────────────── */

.pdf-text-content {
  flex: 1;
  overflow-y: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--app-text);
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.pdf-text-content .pdf-page-break {
  border-top: 1px dashed var(--app-border);
  padding-block-start: 1rem;
  margin-block: 1rem 0.5rem;
  color: var(--app-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── Search ──────────────────────────────────────────────── */

.pdf-search-input {
  flex: 1;
  min-width: 0;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  background: var(--app-surface-2);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  color: var(--app-text);
  outline: none;
  transition: border-color 0.15s;
}

.pdf-search-input:focus {
  border-color: var(--app-accent);
}

.pdf-search-input::placeholder {
  color: var(--app-text-muted);
}

.pdf-search-opts {
  display: flex;
  gap: 1rem;
  margin-block-end: 0.75rem;
  flex-wrap: wrap;
}

.pdf-search-opt {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--app-text-muted);
  cursor: pointer;
}

.pdf-search-opt input[type="checkbox"] {
  accent-color: var(--app-accent);
}

.pdf-search-results {
  flex: 1;
  overflow-y: auto;
}

.pdf-search-result {
  padding: 0.5rem 0.6rem;
  border-radius: var(--app-radius);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s;
}

.pdf-search-result:hover {
  background: var(--app-surface-2);
}

.pdf-search-result__page {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--app-accent);
  margin-inline-end: 0.5rem;
}

.pdf-search-result__context {
  color: var(--app-text);
}

.pdf-search-result mark {
  background: rgb(200 140 0 / 30%);
  color: var(--app-warning);
  border-radius: 2px;
  padding: 0 2px;
}

.pdf-search-status {
  font-size: 0.8rem;
  color: var(--app-text-muted);
  margin-block-start: 0.5rem;
}

/* ── Index ───────────────────────────────────────────────── */

.pdf-index-content {
  flex: 1;
  overflow-y: auto;
}

.pdf-index-item {
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  border-radius: var(--app-radius);
  cursor: pointer;
  transition: background 0.15s;
}

.pdf-index-item:hover {
  background: var(--app-surface-2);
}

.pdf-index-item__label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-inline-end: 0.5rem;
}

.pdf-index-item__label--heading    { background: rgb(74 122 223 / 20%); color: var(--app-accent); }
.pdf-index-item__label--entity     { background: rgb(42 154 88 / 20%);  color: var(--app-success); }
.pdf-index-item__label--citation   { background: rgb(200 140 0 / 20%);  color: var(--app-warning); }
.pdf-index-item__label--date       { background: rgb(126 142 255 / 20%); color: #7e8eff; }

.pdf-index-item__text {
  color: var(--app-text);
}

.pdf-index-item__page {
  font-size: 0.7rem;
  color: var(--app-text-muted);
  margin-inline-start: 0.5rem;
}

/* ── Annotations ─────────────────────────────────────────── */

.pdf-annotations-list {
  flex: 1;
  overflow-y: auto;
}

.pdf-annotation-item {
  padding: 0.6rem;
  border-radius: var(--app-radius);
  border-left: 3px solid var(--app-accent);
  background: var(--app-surface-2);
  margin-block-end: 0.5rem;
}

.pdf-annotation-item__page {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--app-accent);
  margin-block-end: 0.25rem;
}

.pdf-annotation-item__selection {
  font-size: 0.8rem;
  color: var(--app-text-muted);
  font-style: italic;
  margin-block-end: 0.3rem;
  padding: 0.3rem 0.5rem;
  background: rgb(74 122 223 / 8%);
  border-radius: 3px;
}

.pdf-annotation-item__note {
  font-size: 0.85rem;
  color: var(--app-text);
}

.pdf-annotation-item__time {
  font-size: 0.7rem;
  color: var(--app-text-muted);
  margin-block-start: 0.25rem;
}

/* ── Metadata ────────────────────────────────────────────── */

.pdf-metadata {
  flex: 1;
  overflow-y: auto;
}

.pdf-metadata table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.pdf-metadata th,
.pdf-metadata td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--app-border);
}

.pdf-metadata th {
  color: var(--app-text-muted);
  font-weight: 500;
  width: 35%;
}

.pdf-metadata td {
  color: var(--app-text);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
}

/* ── Chain of Custody ────────────────────────────────────── */

.pdf-custody {
  flex: 1;
  overflow-y: auto;
}

.pdf-custody-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 0.6rem;
  font-size: 0.85rem;
  border-left: 2px solid var(--app-border);
  margin-inline-start: 0.5rem;
}

.pdf-custody-item__time {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--app-text-muted);
  min-width: 140px;
  flex-shrink: 0;
}

.pdf-custody-item__event {
  color: var(--app-text);
}

/* ── Pipeline actions ────────────────────────────────────── */

.pdf-actions {
  padding-block-start: 0.5rem;
}

.pdf-action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}

.pdf-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  color: var(--app-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-align: center;
}

.pdf-action-btn:hover {
  background: var(--app-surface-2);
  border-color: var(--app-accent);
}

.pdf-action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pdf-action-btn svg {
  color: var(--app-accent);
}

.pdf-action-btn__label {
  font-size: 0.85rem;
  font-weight: 600;
}

.pdf-action-btn__tier {
  font-size: 0.7rem;
  color: var(--app-text-muted);
}

.pdf-action-btn--primary {
  background: var(--app-accent);
  border-color: var(--app-accent);
  color: #fff;
}

.pdf-action-btn--primary:hover {
  background: var(--app-accent-hover);
  border-color: var(--app-accent-hover);
}

.pdf-action-btn--primary svg {
  color: #fff;
}

/* ── Pipeline status ─────────────────────────────────────── */

.pdf-pipeline-status {
  margin-block-start: 1rem;
  padding: 1rem;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
}

.pdf-pipeline-status__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-block-end: 0.75rem;
  font-size: 0.9rem;
  color: var(--app-text);
}

.pdf-pipeline-stages {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ── Capabilities grid ───────────────────────────────────── */

.pdf-capabilities {
  padding-block-start: 1rem;
}

.pdf-cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.pdf-cap-card {
  padding: 1.25rem;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  transition: border-color 0.2s;
}

.pdf-cap-card:hover {
  border-color: var(--app-accent);
}

.pdf-cap-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--app-text);
  margin: 0 0 0.5rem;
}

.pdf-cap-card p {
  font-size: 0.85rem;
  color: var(--app-text-muted);
  margin: 0;
  line-height: 1.5;
}