/* ================================================================
   IN-APP DOCUMENT VIEWER
================================================================ */
.doc-viewer {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 13, 0.96);
  z-index: 10000;
  display: flex;
  flex-direction: column;
}
.doc-viewer.hidden { display: none; }

.doc-viewer-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--white);
  border-bottom: 1px solid #2d2d28;
  flex-shrink: 0;
}
.doc-viewer-close,
.doc-viewer-btn {
  background: transparent;
  border: 1px solid #2d2d28;
  color: var(--white);
  cursor: pointer;
  padding: 0.45rem 0.55rem;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t);
}
.doc-viewer-close:hover,
.doc-viewer-btn:hover { background: #2d2d28; border-color: var(--gold); }

.doc-viewer-title {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.doc-viewer-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}
.doc-viewer-pageinfo {
  font-size: 0.75rem;
  color: var(--muted);
  margin-right: 0.4rem;
  font-variant-numeric: tabular-nums;
}

.doc-viewer-body {
  flex: 1;
  display: flex;
  min-height: 0;
}
.doc-viewer-main {
  flex: 1;
  overflow: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #1a1a17;
}

/* PDF page wrapper */
#doc-viewer-pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.doc-viewer-page {
  background: var(--white);
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  position: relative;
  display: block;
}
.doc-viewer-page canvas { display: block; }

/* Text layer (overlay for selection + search highlighting) */
.doc-viewer-page .dv-text-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  line-height: 1;
  user-select: text;
  cursor: text;
  /* PDF.js sets per-span transforms; let them through */
  transform-origin: 0 0;
}
.doc-viewer-page .dv-text-layer > span,
.doc-viewer-page .dv-text-layer > br {
  color: transparent;
  position: absolute;
  white-space: pre;
  transform-origin: 0% 0%;
}
.doc-viewer-page .dv-text-layer ::selection {
  background: rgba(201, 168, 76, 0.35);
}
.doc-viewer-page .dv-text-layer mark {
  background: rgba(255, 213, 0, 0.55);
  color: transparent;
  border-radius: 2px;
  padding: 0;
  /* Pulse the most-recent jump target */
}
.doc-viewer-page .dv-text-layer mark.dv-active-match {
  background: rgba(255, 140, 0, 0.7);
  outline: 2px solid rgba(255, 140, 0, 1);
}
.doc-viewer-page-number {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: rgba(0,0,0,0.55);
  color: white;
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

/* Image viewer */
.doc-viewer-image {
  max-width: 100%;
  max-height: calc(100dvh - 8rem);
  background: var(--white);
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

/* Fallback message */
.doc-viewer-fallback {
  background: var(--white);
  border-radius: var(--r-md);
  padding: 2rem 2.5rem;
  text-align: center;
  color: var(--ink);
  max-width: 28rem;
}
.doc-viewer-fallback-icon {
  width: 3rem; height: 3rem;
  margin: 0 auto 1rem;
  color: var(--muted);
}
.doc-viewer-fallback-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.doc-viewer-fallback-sub {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

/* Loading state */
.doc-viewer-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  color: var(--muted);
  font-size: 0.875rem;
  padding: 4rem 0;
}
.doc-viewer-loading-spinner {
  width: 2rem; height: 2rem;
  border: 3px solid #2d2d28;
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: viewer-spin 0.9s linear infinite;
}
@keyframes viewer-spin { to { transform: rotate(360deg); } }

/* ── Sidebar (search + Lex panels) ─────────────────────────── */
.doc-viewer-sidebar {
  width: 22rem;
  flex-shrink: 0;
  background: var(--white);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.doc-viewer-sidebar.hidden { display: none; }

.dv-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
.dv-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}
.dv-panel-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
}
.dv-panel-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 0.25rem;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
}
.dv-panel-close:hover { color: var(--ink); background: var(--border-2); }

.dv-search-input-wrap {
  padding: 0.75rem 1rem 0.5rem;
}
.dv-search-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--ink);
  outline: none;
}
.dv-search-input:focus { border-color: var(--gold); }

.dv-search-meta {
  padding: 0 1rem 0.5rem;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  min-height: 1rem;
}

.dv-search-results {
  flex: 1;
  overflow-y: auto;
  padding: 0 0.6rem 0.85rem;
}
.dv-search-result {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-bottom: 0.4rem;
  cursor: pointer;
  transition: all var(--t);
  background: var(--white);
}
.dv-search-result:hover { border-color: var(--gold); background: var(--gold-bg); }
.dv-search-result-page {
  display: inline-block;
  background: var(--gold-bg);
  color: var(--gold);
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-variant-numeric: tabular-nums;
}
.dv-search-snippet {
  font-size: 0.75rem;
  color: var(--mid);
  line-height: 1.5;
  word-break: break-word;
}
.dv-search-snippet mark {
  background: #FBF3C5;
  color: var(--ink);
  padding: 0 0.15rem;
  border-radius: 2px;
  font-weight: 600;
}
.dv-search-empty {
  padding: 1.5rem 1rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Lex panel ─────────────────────────────────────────────── */
.dv-panel.hidden { display: none; }

.dv-lex-context {
  padding: 0.5rem 1rem;
  background: var(--gold-bg);
  border-bottom: 1px solid var(--gold-dim);
  font-size: 0.7rem;
  color: var(--gold);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}
.dv-lex-context.ready::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
}
.dv-lex-context.indexing::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--warn);
  display: inline-block;
  animation: dv-pulse 1.2s ease-in-out infinite;
}
@keyframes dv-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.dv-lex-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.dv-lex-empty {
  text-align: center;
  padding: 1rem 0.5rem;
}
.dv-lex-empty-icon { margin-bottom: 0.5rem; }
.dv-lex-empty-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.25rem;
}
.dv-lex-empty-sub {
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
  line-height: 1.45;
}
.dv-lex-suggestions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.dv-lex-suggestion {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.5rem 0.7rem;
  font-size: 0.75rem;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: all var(--t);
}
.dv-lex-suggestion:hover { border-color: var(--gold); background: var(--gold-bg); }

.dv-lex-msg-user {
  background: var(--ink);
  color: var(--white);
  padding: 0.55rem 0.75rem;
  border-radius: 0.85rem 0.85rem 0.2rem 0.85rem;
  font-size: 0.8125rem;
  align-self: flex-end;
  max-width: 85%;
  line-height: 1.45;
  word-wrap: break-word;
}
.dv-lex-msg-ai {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.65rem 0.8rem;
  border-radius: 0.85rem 0.85rem 0.85rem 0.2rem;
  font-size: 0.8125rem;
  align-self: flex-start;
  max-width: 92%;
  line-height: 1.55;
  word-wrap: break-word;
}
.dv-lex-msg-ai a.dv-cite {
  display: inline-block;
  background: var(--gold-bg);
  color: var(--gold);
  padding: 0 0.35rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-decoration: none;
  margin: 0 0.1rem;
  cursor: pointer;
  border: 1px solid var(--gold-dim);
  vertical-align: baseline;
}
.dv-lex-msg-ai a.dv-cite:hover { background: var(--gold); color: var(--ink); }
.dv-lex-thinking {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.75rem;
  color: var(--muted);
}
.dv-lex-thinking-dot {
  width: 5px; height: 5px;
  background: var(--gold);
  border-radius: 50%;
  animation: dv-pulse 1.2s ease-in-out infinite;
}
.dv-lex-thinking-dot:nth-child(2) { animation-delay: 0.15s; }
.dv-lex-thinking-dot:nth-child(3) { animation-delay: 0.3s; }

.dv-lex-input-wrap {
  display: flex;
  gap: 0.4rem;
  padding: 0.65rem 0.85rem 0.85rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  align-items: flex-end;
  background: var(--white);
}
.dv-lex-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.5rem 0.65rem;
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  resize: none;
  outline: none;
  background: var(--white);
  color: var(--ink);
  line-height: 1.4;
}
.dv-lex-input:focus { border-color: var(--gold); }

/* Disabled state for non-PDF (no search/Lex available) */
.doc-viewer-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Active highlight for the search button when sidebar is open */
.doc-viewer-btn.active {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}

/* ── Mobile: sidebar takes over the screen ─────────────────── */
@media (max-width: 768px) {
  .doc-viewer-sidebar {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 24rem;
    z-index: 5;
    box-shadow: -8px 0 24px rgba(0,0,0,0.4);
  }
}

/* Error state */
.doc-viewer-error {
  background: var(--white);
  border-left: 4px solid var(--danger);
  padding: 1rem 1.25rem;
  border-radius: var(--r-md);
  max-width: 30rem;
  color: var(--ink);
}
.doc-viewer-error-title { font-weight: 600; margin-bottom: 0.4rem; }
.doc-viewer-error-msg { font-size: 0.8125rem; color: var(--muted); }