/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #ffffff;
  --accent:       #c4956a;
  --text-muted:   #b0a396;
  --page-border:  5px;   /* thickness of the black frame overlaid on each page */
}

html, body {
  height: 100%;
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--bg);
  overflow: hidden;
}


/* ════════════════════════════════════════
   LOADING OVERLAY
   Loader adapted from Uiverse.io by vinodjangid07
   (classes namespaced + recolored to match theme)
════════════════════════════════════════ */
.book-loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  background: var(--bg);
  transition: opacity 0.5s ease;
}

.book-loader.hidden {
  opacity: 0;
  pointer-events: none;
}

.book-loader-label {
  font-family: -apple-system, system-ui, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.loader {
  width: fit-content;
  height: fit-content;
  display: flex;
  align-items: center;
  justify-content: center;
  --book-color: var(--accent);
  --book-cover-color: #8a6240;
}

.loader-book {
  width: 150px;
  height: 13px;
  background-color: var(--book-color);
  border-bottom: 2px solid var(--book-cover-color);
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  position: relative;
}

.loader-page {
  width: 50%;
  height: 2px;
  background-color: var(--book-color);
  animation: loader-paging 0.7s ease-out infinite;
  transform-origin: left;
}

.loader-page2 {
  animation-duration: 0.8s;
  position: absolute;
}

@keyframes loader-paging {
  10%  { transform: rotateZ(0deg); }
  100% { transform: rotateZ(-180deg); }
}


/* ════════════════════════════════════════
   LOGO — behind the book on the left half
════════════════════════════════════════ */
.logo-backdrop {
  position: fixed;
  top: 0; left: 0;
  width: 50%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  pointer-events: none;
  z-index: 0;
}

.logo {
  max-width: 100%;
  max-height: 55vh;
  object-fit: contain;
}


/* ════════════════════════════════════════
   BOOK SCENE — full viewport, spine centred
════════════════════════════════════════ */
.book-scene {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 1;
  pointer-events: none;
}

#book,
.book-nav {
  pointer-events: auto;
}


/* ── Page images — contain keeps aspect ratio, no stretch ── */
.page {
  background: #fff;
  position: relative;        /* containing block for the gutter / sheen layers */
}

.page img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}


/* ════════════════════════════════════════
   REAL-BOOK FEEL
   1. A consistent thick black frame overlaid on every page — normalizes the
      uneven/missing borders baked into the artwork. Where two pages meet at
      the spine, their inner frames stack into one clean divider line.
   2. A light binding gutter shadow, darkest at the spine and fading outward.
   3. A soft drop shadow that lifts the whole book off the white backdrop.
   Both layers ride above the artwork; StPageFlip's own flip shadows draw at a
   much higher z-index, so flipping still looks right.
════════════════════════════════════════ */

.page::before,
.page::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ::before = consistent black border framing the page */
.page::before {
  border: var(--page-border) solid #000;
  z-index: 4;
}

/* At the spine, each page's inner border is widened a touch and pushed to
   OVERSHOOT the seam, so the two borders overlap across the sub-pixel gap
   between the page elements — no white hairline can show through. The pseudo
   is offset outward by the same amount it's widened, so the combined divider
   still spans one --page-border width, matching the outer borders. */
.page.--left::before {
  right: calc(var(--page-border) * -0.5);
  border-right-width: calc(var(--page-border) * 0.75);
}
.page.--right::before {
  left: calc(var(--page-border) * -0.5);
  border-left-width: calc(var(--page-border) * 0.75);
}

/* ::after = binding gutter shadow, drawn only along the spine edge.
   Kept light and narrow so it reads as a fold, not a smudge. */
.page::after {
  z-index: 3;
}

/* Left (verso) page → spine is on its RIGHT edge */
.page.--left::after {
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0)        90%,
    rgba(0, 0, 0, 0.07)     96%,
    rgba(0, 0, 0, 0.20)    100%
  );
}

/* Right (recto) page → spine is on its LEFT edge */
.page.--right::after {
  background: linear-gradient(
    to left,
    rgba(0, 0, 0, 0)        90%,
    rgba(0, 0, 0, 0.07)     96%,
    rgba(0, 0, 0, 0.20)    100%
  );
}

/* Hard covers get a slightly stronger spine shadow so the binding reads as
   thicker board stock rather than a thin paper leaf. */
.page-cover.--left::after {
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0)        88%,
    rgba(0, 0, 0, 0.10)     95%,
    rgba(0, 0, 0, 0.28)    100%
  );
}

.page-cover.--right::after {
  background: linear-gradient(
    to left,
    rgba(0, 0, 0, 0)        88%,
    rgba(0, 0, 0, 0.10)     95%,
    rgba(0, 0, 0, 0.28)    100%
  );
}

/* Lift the whole book off the flat white background. drop-shadow follows the
   real rendered page shapes, so a mid-flip page casts a believable shadow. */
#book {
  filter: drop-shadow(0 14px 26px rgba(60, 40, 20, 0.22));
}


/* ════════════════════════════════════════
   NAV
════════════════════════════════════════ */
.book-nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.6rem;
  flex-shrink: 0;
}

/* ── Button click bounce ── */
@keyframes btn-pop {
  0%   { transform: scale(1); }
  35%  { transform: scale(0.82); }
  65%  { transform: scale(1.12); }
  100% { transform: scale(1); }
}

.nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav-btn:hover   { background: var(--accent); color: #fff; }
.nav-btn:disabled { opacity: 0.25; cursor: default; }
.nav-btn:disabled:hover { background: transparent; color: var(--accent); }

.nav-btn.popped  { animation: btn-pop 0.22s ease forwards; }

/* Close button gets a slightly warmer tint to signal destructive-ish action */
.nav-btn--close {
  font-size: 0.9rem;
}

/* ── Page-info as a clickable jump trigger ── */
.page-info-btn {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  min-width: 56px;
  text-align: center;
  font-family: -apple-system, system-ui, sans-serif;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
  position: relative;
}

.page-info-btn::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transform: translateX(-50%);
  transition: width 0.2s ease;
}

.page-info-btn:hover { color: var(--accent); }
.page-info-btn:hover::after { width: 80%; }
.page-info-btn.open { color: var(--accent); }
.page-info-btn.open::after { width: 80%; }

/* ── Jump-to-page popover ── */
@keyframes panel-up {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.jump-panel {
  position: absolute;
  bottom: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.97);
  border: 1.5px solid var(--accent);
  border-radius: 14px;
  padding: 12px 16px 14px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.13);
  white-space: nowrap;
  z-index: 20;
  display: none;
}

.jump-panel.open {
  display: block;
  animation: panel-up 0.2s ease forwards;
}

/* small arrow pointing down at the page-info button */
.jump-panel::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid var(--accent);
}

.jump-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 10px;
  font-family: -apple-system, system-ui, sans-serif;
  text-transform: uppercase;
}

.jump-dots {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  max-width: 340px;
  justify-content: center;
}

.jump-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 0.72rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease;
  font-family: -apple-system, system-ui, sans-serif;
}

.jump-dot:hover  { background: var(--accent); color: #fff; transform: scale(1.15); }
.jump-dot.active { background: var(--accent); color: #fff; }
.jump-dot.popped { animation: btn-pop 0.22s ease forwards; }


/* ════════════════════════════════════════
   STORYTELLER MODE
════════════════════════════════════════ */

/* Ensure the nav always floats above the overlay/lens */
.book-nav {
  position: relative;
  z-index: 10;
}

/* ── Toggle button ── */
.storyteller-btn {
  margin-left: 0.5rem;
}

.storyteller-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px rgba(196, 149, 106, 0.5);
}

/* ── Input blocker: sits above #book, intercepts StPageFlip mouse events ── */
.storyteller-blocker {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

body.storyteller-active .storyteller-blocker {
  pointer-events: auto;
}

/* ── Dark cinematic overlay ── */
.storyteller-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  background: rgba(0, 0, 0, 0.38);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.storyteller-overlay.active {
  opacity: 1;
}

/* ── Magnifier lens ── */
@keyframes lens-breathe {
  0%, 100% {
    box-shadow:
      0 0 0 2px rgba(210, 160, 60, 0.35),
      0 0 0 4px rgba(255, 215, 120, 0.12),
      0 0 30px 8px rgba(200, 140, 40, 0.12),
      0 10px 50px rgba(0, 0, 0, 0.7);
  }
  50% {
    box-shadow:
      0 0 0 2px rgba(255, 200, 80, 0.6),
      0 0 0 5px rgba(255, 215, 120, 0.18),
      0 0 40px 12px rgba(200, 140, 40, 0.22),
      0 10px 50px rgba(0, 0, 0, 0.7);
  }
}

.storyteller-lens {
  position: fixed;
  left: var(--cx, 50%);
  top: var(--cy, 50%);
  width: 550px;
  height: 550px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  overflow: hidden;
  pointer-events: none;
  z-index: 6;
  opacity: 0;
  transition: opacity 0.45s ease;
  background: #111;
  /* Warm amber ring that pulses via lens-breathe */
  box-shadow:
    0 0 0 2px rgba(210, 160, 60, 0.35),
    0 10px 50px rgba(0, 0, 0, 0.7);
}

.storyteller-lens.active {
  opacity: 1;
  animation: lens-breathe 3s ease-in-out infinite;
}

.storyteller-lens-img {
  position: absolute;
  display: block;
  /* width / height / left / top set dynamically by JS */
  /* Crisp, vivid look inside the lens */
  filter: contrast(1.12) saturate(1.2) brightness(1.05);
  image-rendering: auto;
}

/* Glass lens surface — convex highlight top-left, soft shadow bottom-right */
.storyteller-lens::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  background:
    radial-gradient(
      circle at 32% 28%,
      rgba(255, 255, 255, 0.10) 0%,
      transparent 55%
    ),
    radial-gradient(
      circle at 68% 72%,
      rgba(0, 0, 0, 0.10) 0%,
      transparent 50%
    );
}

/* ── Hide nav in storyteller mode (visibility keeps layout space so book doesn't jump) ── */
body.storyteller-active .book-nav {
  visibility: hidden;
}

/* ── Hide native cursor over the book while lens is active ── */
body.storyteller-active .book-scene {
  cursor: none;
}

/* ── "Click anywhere to exit" hint ── */
.storyteller-hint {
  position: absolute;
  bottom: 2rem;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
  z-index: 8;
  opacity: 0;
  transition: opacity 0.45s ease;
  font-family: -apple-system, system-ui, sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: #111;
  background: rgba(255, 255, 255, 0.88);
  padding: 7px 20px;
  border-radius: 999px;
  width: fit-content;
  margin: 0 auto;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
}

body.storyteller-active .storyteller-hint {
  opacity: 1;
}