/* ── pdf-toolbar ──────────────────────────────────────────────────────────── */

.pdf-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(250, 247, 242, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
  z-index: 2;
}

.pdf-toolbar > .-info {
  flex: 1;
  min-width: 0;
}

.pdf-toolbar > .-info > .-title {
  font-family: var(--font-serif);
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--slate-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pdf-toolbar .-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--slate-600);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--dur-fast) var(--ease-out);
}

.pdf-toolbar .-btn:hover:not(:disabled) {
  background: var(--slate-50);
  color: var(--slate-800);
}

.pdf-toolbar .-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.pdf-toolbar .-btn.-active {
  background: var(--slate-50);
  color: var(--slate-700);
}

/* ── pdf-zoom-controls ────────────────────────────────────────────────────── */

.pdf-zoom-controls {
  display: flex;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
}

.pdf-zoom-controls > .-display {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--fg-3);
  min-width: 38px;
  text-align: center;
  user-select: none;
}

.pdf-zoom-controls > .-btn {
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
  color: var(--slate-500);
}

/* ── pdf-page-info ────────────────────────────────────────────────────────── */

.pdf-page-info {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--fg-3);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: 4px;
  display: flex;
  align-items: center;
}

.pdf-page-info > .-sep {
  margin: 0 3px;
}

.pdf-page-info > .-input {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--fg-2);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  width: 34px;
  text-align: center;
  padding: 2px 2px;
  outline: none;
  -moz-appearance: textfield;
  appearance: textfield;
}

.pdf-page-info > .-input::-webkit-inner-spin-button,
.pdf-page-info > .-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.pdf-page-info > .-input:hover {
  border-color: var(--border-soft);
  background: rgba(255,255,255,0.7);
}

.pdf-page-info > .-input:focus {
  border-color: var(--slate-300);
  background: #fff;
  color: var(--slate-800);
}

/* ── Mobile toolbar overrides ─────────────────────────────────────────────── */

@media (max-width: 767px) {
  .pdf-toolbar { display: none; }
  .pdf-scroll-surface { padding-bottom: 72px; }
  .pdf-loading { inset: 52px 0 0; }
}

/* ── pdf-loading ──────────────────────────────────────────────────────────── */

.pdf-loading {
  position: absolute;
  inset: 53px 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--paper-2);
  z-index: 3;
}

.pdf-loading[hidden] {
  display: none;
}

.pdf-loading > .-spinner {
  width: 28px;
  height: 28px;
  border: 2.5px solid var(--border-soft);
  border-top-color: var(--slate-400);
  border-radius: 50%;
  animation: pdf-spin 0.75s linear infinite;
}

.pdf-loading > .-label {
  font-family: var(--font-sans);
  font-size: var(--fs-13);
  color: var(--fg-3);
  margin: 0;
}

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

/* ── pdf-scroll-surface & pages ──────────────────────────────────────────── */

.pdf-scroll-surface {
  flex: 1;
  overflow-y: auto;
  overflow-x: auto;
  padding: 28px 0 40px;
}

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

.pdf-page-wrap {
  position: relative;
  width: calc(560px * var(--pdf-zoom, 1));
  background: #fff;
  border-radius: 4px;
  box-shadow: var(--shadow-2);
  overflow: hidden;
  flex-shrink: 0;
}

.pdf-page-wrap > .-canvas {
  display: block;
  width: 100%;
  height: auto;
}

/* ── pdf-text-layer ───────────────────────────────────────────────────────── */

.pdf-text-layer {
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  line-height: 1;
  user-select: text;
}

.pdf-text-layer span,
.pdf-text-layer br {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
}

/* ── pdf-highlight-overlay ────────────────────────────────────────────────── */

.pdf-highlight-overlay {
  position: absolute;
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 5;
  background: var(--hl-bg);
}

.pdf-highlight-overlay.-flash {
  animation: hl-flash 0.9s ease-in-out;
}

@keyframes hl-flash {
  0%   { opacity: 1; }
  20%  { opacity: 0.15; }
  50%  { opacity: 1; }
  75%  { opacity: 0.15; }
  100% { opacity: 1; }
}