.directive-pdf {
  border: 1px solid var(--color-spacer);
  border-radius: 4px;
  margin: 1em 0;
  overflow: hidden;
}

.directive-pdf .pdf-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--color-nav);
  border-bottom: 1px solid var(--color-spacer);
}

.directive-pdf .pdf-title {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.directive-pdf .pdf-download {
  display: flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-spacer);
  border-radius: 4px;
  color: inherit;
}

.directive-pdf .pdf-download:hover {
  background: var(--color-background);
}

.directive-pdf .pdf-download .icon {
  display: block;
  width: 20px;
  height: 20px;
}

/* A desk for the sheets: they stay white, also in dark mode. */
.directive-pdf .pdf-viewer {
  padding: 12px;
  background: color-mix(in srgb, var(--color-spacer) 45%, transparent);
}

.directive-pdf .pdf-viewer:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: -2px;
}

.directive-pdf .pdf-fallback,
.directive-pdf .pdf-loading,
.directive-pdf .pdf-error {
  display: block;
  margin: 0;
  padding: 8px 4px;
}

.directive-pdf.pdf-ready .pdf-loading {
  display: none;
}

.directive-pdf .pdf-error {
  color: var(--color-error, #b00020);
}

.directive-pdf .pdf-page {
  position: relative;
  width: 100%;
  margin: 0 auto 12px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 1px 4px rgb(0 0 0 / 0.25);
  color-scheme: only light;
  /* pdf.js rounds its layers to whole pixels with these. */
  --scale-round-x: 1px;
  --scale-round-y: 1px;
}

.directive-pdf .pdf-page:last-child {
  margin-bottom: 0;
}

.directive-pdf .pdf-page canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* embed: the browser's own viewer */
.directive-pdf .pdf-embed {
  display: block;
  width: 100%;
  height: var(--pdf-height, 80dvh);
  border: 0;
}

/* thumb: the first page beside the title */
.directive-pdf.pdf-view-thumb {
  display: flex;
  align-items: stretch;
}

.directive-pdf.pdf-view-thumb .pdf-header {
  flex: 1;
  min-width: 0;
  border-bottom: 0;
}

.directive-pdf.pdf-view-thumb .pdf-viewer {
  order: -1;
  flex: none;
  width: 120px;
  padding: 8px;
  border-right: 1px solid var(--color-spacer);
}

.directive-pdf.pdf-view-thumb .pdf-thumb {
  display: block;
}

.directive-pdf.pdf-view-thumb .pdf-fallback,
.directive-pdf.pdf-view-thumb .pdf-loading {
  font-size: 0.75em;
}

/* The thumb is a picture, not text to select. */
.directive-pdf.pdf-view-thumb .textLayer {
  display: none;
}

/* slides: one page, as large as it fits */
.directive-pdf.pdf-view-slides .pdf-viewer {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.directive-pdf .pdf-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: var(--pdf-height, auto);
  aspect-ratio: var(--pdf-ratio, 4 / 3);
  min-height: 0;
}

.directive-pdf[style*="--pdf-height"] .pdf-stage {
  aspect-ratio: auto;
}

.directive-pdf .pdf-stage .pdf-page {
  flex: none;
  margin: 0;
}

.directive-pdf .pdf-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.directive-pdf .pdf-controls button {
  min-width: 40px;
  height: 40px;
  border: 1px solid var(--color-spacer);
  border-radius: 4px;
  background: var(--color-nav);
  color: inherit;
  font: inherit;
  font-size: 1.25em;
  line-height: 1;
  cursor: pointer;
}

.directive-pdf .pdf-controls button:disabled {
  opacity: 0.4;
  cursor: default;
}

.directive-pdf .pdf-controls .pdf-fullscreen {
  margin-left: auto;
}

.directive-pdf .pdf-counter {
  min-width: 5em;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.directive-pdf:fullscreen {
  display: flex;
  flex-direction: column;
  border: 0;
  border-radius: 0;
  background: var(--color-background);
}

.directive-pdf:fullscreen .pdf-viewer {
  flex: 1;
  min-height: 0;
}

.directive-pdf:fullscreen .pdf-stage {
  flex: 1;
  height: auto;
  aspect-ratio: auto;
}

/*
 * pdf.js's text layer: transparent text above the picture of the page, for
 * selecting, searching and reading aloud. From pdf.js's pdf_viewer.css
 * (Apache License 2.0), without CSS nesting for older browsers.
 */
.directive-pdf .textLayer {
  position: absolute;
  inset: 0;
  overflow: clip;
  opacity: 1;
  line-height: 1;
  letter-spacing: normal;
  word-spacing: normal;
  text-align: initial;
  -webkit-text-size-adjust: none;
  -moz-text-size-adjust: none;
  text-size-adjust: none;
  forced-color-adjust: none;
  transform-origin: 0 0;
  caret-color: CanvasText;
  z-index: 0;
  --min-font-size: 1;
  --text-scale-factor: calc(var(--total-scale-factor) * var(--min-font-size));
  --min-font-size-inv: calc(1 / var(--min-font-size));
}

.directive-pdf .textLayer span,
.directive-pdf .textLayer br {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}

.directive-pdf .textLayer > :not(.markedContent),
.directive-pdf .textLayer .markedContent span:not(.markedContent) {
  z-index: 1;
  --font-height: 0;
  font-size: calc(var(--text-scale-factor) * var(--font-height));
  --scale-x: 1;
  --rotate: 0deg;
  transform: rotate(var(--rotate)) scaleX(var(--scale-x))
    scale(var(--min-font-size-inv));
}

.directive-pdf .textLayer .markedContent {
  display: contents;
}

.directive-pdf .textLayer span[role="img"] {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  cursor: default;
}

.directive-pdf .textLayer ::selection {
  background: rgb(0 0 255 / 0.25);
  color: transparent;
}

.directive-pdf .textLayer br::selection {
  background: transparent;
}

.directive-pdf .textLayer .endOfContent {
  display: block;
  position: absolute;
  inset: 100% 0 0;
  z-index: 0;
  cursor: default;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

@media print {
  .directive-pdf .pdf-controls,
  .directive-pdf .pdf-download {
    display: none;
  }
}