:root {
  --bg: #000;
  --panel: #050505;
  --panel-2: #171717;
  --border: #262626;
  --text: #e2e2e2;
  --text-dim: #808080;
  --accent: #4f8ef7;
  --accent-soft: rgba(79, 142, 247, 0.28);
  --pivot: #ff5252;
  --orp-x: 35%;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, "Segoe UI", sans-serif;
  overflow: hidden;
}

/* ---------- Toolbar ---------- */

#toolbar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 46px;
  padding: 0 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.tb-group { display: flex; align-items: center; gap: 8px; min-width: 0; }
.tb-left { flex: 1 1 0; }
.tb-right { flex: 1 1 0; justify-content: flex-end; }

#toolbar button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
#toolbar button:hover { background: #222; }
#toolbar button.active {
  background: rgba(79, 142, 247, 0.18);
  border-color: var(--accent);
}
#toolbar button.accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
#toolbar button.accent:hover { filter: brightness(1.1); }
#toolbar button.accent.active { background: #2f6ad1; }

#btnHome {
  background: none !important;
  border: none;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--text);
}
#btnHome:hover { color: var(--accent); }

#btnZoomOut, #btnZoomIn { width: 30px; padding: 5px 0; }
#zoomLabel { min-width: 44px; text-align: center; color: var(--text-dim); }
#pageInfo { color: var(--text-dim); white-space: nowrap; }
#pageInfo.hidden { display: none; }
#pageInput {
  width: 52px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  padding: 3px 4px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
  appearance: textfield;
}
#pageInput::-webkit-outer-spin-button,
#pageInput::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
#pageInput:focus { outline: 1px solid var(--accent); }

#docTitle {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-dim);
}

.hint { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
@media (max-width: 900px) { .hint { display: none; } }

/* ---------- Layout ---------- */

#content {
  display: flex;
  height: calc(100% - 46px);
}
body.noToolbar #toolbar { display: none; }
body.noToolbar #content { height: 100%; }

#sidebar {
  flex: none;
  width: 280px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow: auto;
  padding: 10px 0;
}
#sidebar.hidden { display: none; }

.sb-title {
  font-weight: 600;
  padding: 2px 14px 8px;
}
.sb-empty {
  color: var(--text-dim);
  padding: 4px 14px;
  font-size: 13px;
}

#outline ul {
  list-style: none;
  margin: 0;
  padding-left: 14px;
}
#outline > ul { padding-left: 6px; }
#outline a {
  display: block;
  color: var(--text);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#outline a:hover { background: var(--panel-2); }

/* ---------- Pages ---------- */

#viewerContainer {
  position: relative;
  flex: 1;
  min-width: 0;
  height: 100%;
  overflow: auto;
}

#pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 16px;
}

.page {
  --user-unit: 1;
  --total-scale-factor: calc(var(--scale-factor) * var(--user-unit));
  --scale-round-x: 1px;
  --scale-round-y: 1px;

  position: relative;
  background: #fff;
  box-shadow: 0 0 0 1px #262626, 0 4px 24px rgba(0, 0, 0, 0.8);
  flex: none;
}
body.inverted .page { background: #000; }

/* Invert the rendered page (white paper -> true black). The .imgOverlay
   canvas on top repaints just the image regions un-inverted. */
body.inverted .pageCanvas { filter: invert(1) hue-rotate(180deg); }
.page canvas.imgOverlay {
  position: absolute;
  left: 0;
  top: 0;
  display: none;
  pointer-events: none;
}
body.inverted .page canvas.imgOverlay { display: block; }

.page canvas { display: block; }

/* ---------- PDF.js text layer ----------
   Ported from the official pdf.js v6 viewer.css: the TextLayer positions and
   scales each span through these custom properties, so they must match. */

.textLayer {
  color-scheme: only light;
  position: absolute;
  text-align: initial;
  inset: 0;
  overflow: clip;
  opacity: 1;
  line-height: 1;
  letter-spacing: normal;
  word-spacing: normal;
  text-size-adjust: none;
  forced-color-adjust: none;
  transform-origin: 0 0;
  caret-color: CanvasText;

  --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));
}

.textLayer :is(span, br) {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
  user-select: text;
}

.textLayer > :not(.markedContent),
.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));
}

.textLayer .markedContent { display: contents; }

.textLayer span.w {
  position: static;
  border-radius: 2px;
}
body.picking .textLayer,
body.picking .textLayer span.w { cursor: crosshair; }
body.picking .textLayer span.w:hover { background: var(--accent-soft); }
body.picking .hint { color: var(--accent); }
.textLayer span.w.current {
  background: rgba(96, 144, 232, 0.32);
}
body.inverted .textLayer span.w.current {
  background: rgba(120, 165, 255, 0.4);
}

.textLayer ::selection { background: rgba(0, 100, 255, 0.25); }

/* ---------- PDF link annotations ---------- */

.linkLayer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.linkLayer a {
  position: absolute;
  pointer-events: auto;
  border-radius: 2px;
}
.linkLayer a:hover {
  background: rgba(79, 142, 247, 0.18);
  box-shadow: 0 0 0 1px var(--accent);
}
body.picking .linkLayer a { pointer-events: none; }

/* ---------- Notices ---------- */

#notice {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  color: var(--text-dim);
  pointer-events: none;
  padding: 24px;
}
#notice.hidden { display: none; }
.notice-title { font-size: 22px; font-weight: 600; color: var(--text); }

#recentBox {
  pointer-events: auto;
  margin-top: 18px;
  width: min(460px, 90vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  text-align: left;
}
#recentBox.hidden { display: none; }
.recent-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--text);
  padding: 2px 6px 8px;
}
#recentList { display: flex; flex-direction: column; gap: 2px; }
.recent-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  border-radius: 8px;
  padding: 8px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  text-align: left;
}
.recent-row:hover { background: var(--panel-2); }
.recent-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-meta { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.recent-del { color: var(--text-dim); padding: 2px 6px; border-radius: 4px; }
.recent-del:hover { background: #2a2a2a; color: var(--text); }

.gh-link {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
}
.gh-link:hover { color: var(--text); }

body.dragover::after {
  content: "Drop PDF to open";
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  background: rgba(79, 142, 247, 0.25);
  border: 3px dashed var(--accent);
  pointer-events: none;
}

/* ---------- RSVP overlay ---------- */

#rsvp {
  position: fixed;
  z-index: 50;
  width: 420px;
  max-width: calc(100vw - 16px);
  background: rgba(3, 3, 3, 0.94);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  user-select: none;
}
#rsvp.hidden { display: none; }

#rsvpHeader {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  cursor: grab;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
}
#rsvpHeader:active { cursor: grabbing; }
.rsvp-grip { letter-spacing: -2px; }
.rsvp-title { font-weight: 600; color: var(--text); }
#rsvpCounter { margin-left: auto; font-variant-numeric: tabular-nums; }
#rsvpEta { font-variant-numeric: tabular-nums; white-space: nowrap; }

#rsvpClose {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}
#rsvpClose:hover { background: var(--panel-2); color: var(--text); }

#rsvpStage {
  position: relative;
  height: 96px;
  overflow: hidden;
}

.guide {
  position: absolute;
  left: var(--orp-x);
  width: 2px;
  height: 10px;
  margin-left: -1px;
  background: var(--pivot);
  opacity: 0.85;
}
.guide-top { top: 8px; }
.guide-bottom { bottom: 8px; }

#rsvpWord {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  white-space: pre;
  font: 600 30px/1.2 Georgia, "Times New Roman", serif;
  color: var(--text);
  will-change: transform;
}
#wPivot { color: var(--pivot); }

#rsvpProgress {
  height: 6px;
  background: var(--panel-2);
  cursor: pointer;
}
#rsvpProgressFill {
  height: 100%;
  width: 0;
  background: var(--accent);
}

#rsvpControls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
}

#rsvpControls button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 38px;
  height: 30px;
  font-size: 13px;
  cursor: pointer;
}
#rsvpControls button:hover { background: #222; }
#btnPlay { width: 48px; background: var(--accent); border-color: var(--accent); color: #fff; }
#btnPlay:hover { filter: brightness(1.1); background: var(--accent); }

#wpmBox {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
}
#wpmBox button { width: 30px; }
#wpmInput {
  width: 60px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  padding: 4px 6px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
  appearance: textfield;
}
#wpmInput::-webkit-outer-spin-button,
#wpmInput::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
#wpmInput:focus { outline: 1px solid var(--accent); }
.wpm-unit { color: var(--text-dim); font-size: 12px; }