/* ============================================================
   Dancing in Time — 3D Book Reader
   Styles for the "look inside" affordance + the reader overlay.
   The rotating cover (.book3d / .b3-*) lives in index.html; this
   file only adds the open-the-book experience layered on top.
   ============================================================ */

/* ---- native smooth scroll (replaces Lenis; zero input latency) ---- */
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ---- "Look inside" button under the 3D cover ---- */
.book-lookinside {
  display: inline-flex; align-items: center; gap: 0.6em;
  margin: 1.4rem auto 0; padding: 0.72em 1.5em;
  font-family: 'Cinzel', serif; font-size: 0.6rem; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--gold-pale, #f5dfa0);
  background: transparent; border: 1px solid rgba(201, 151, 58, 0.45);
  border-radius: 2px; cursor: pointer;
  transition: background 0.35s ease, border-color 0.35s ease,
              color 0.35s ease, transform 0.35s cubic-bezier(.16,1,.3,1);
}
.book-lookinside:hover,
.book-lookinside:focus-visible {
  background: rgba(201, 151, 58, 0.12);
  border-color: var(--gold, #c9973a);
  color: #fff; transform: translateY(-2px); outline: none;
}
.book-lookinside .li-arrow { transition: transform 0.35s cubic-bezier(.16,1,.3,1); }
.book-lookinside:hover .li-arrow,
.book-lookinside:focus-visible .li-arrow { transform: translateX(4px); }
.book3d { cursor: pointer; }

/* ---- Reader overlay (full-screen modal) ---- */
.bookreader { position: fixed; inset: 0; z-index: 1000; display: flex; }
.bookreader[hidden] { display: none; }

.bookreader__backdrop {
  position: absolute; inset: 0;
  background: rgba(4, 4, 10, 0.86);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; transition: opacity 0.4s ease;
}
.bookreader.is-open .bookreader__backdrop { opacity: 1; }

.bookreader__shell {
  position: relative; margin: auto;
  width: min(1120px, 95vw); height: min(92vh, 880px);
  display: flex; flex-direction: column; padding: 1.1rem 0.4rem 0.6rem;
  opacity: 0; transform: translateY(18px) scale(0.985);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(.16,1,.3,1);
}
.bookreader.is-open .bookreader__shell { opacity: 1; transform: none; }

.bookreader__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 0.4rem 0.85rem;
}
.bookreader__title {
  font-family: 'Cinzel', serif; font-size: 0.64rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-muted, #9a9aae);
}
.bookreader__title em { color: var(--gold-pale, #f5dfa0); font-style: normal; }

.bookreader__close {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18); background: rgba(255, 255, 255, 0.04);
  color: #e8e8f0; font-size: 1rem; line-height: 1; cursor: pointer;
  transition: background 0.3s, border-color 0.3s, transform 0.3s;
}
.bookreader__close:hover,
.bookreader__close:focus-visible {
  background: rgba(201, 151, 58, 0.18); border-color: var(--gold, #c9973a);
  transform: rotate(90deg); outline: none;
}

.bookreader__stage {
  position: relative; flex: 1; min-height: 0;
  display: flex; align-items: center; justify-content: center;
}
.bookreader__stage canvas { display: block; touch-action: none; max-width: 100%; max-height: 100%; }

.bookreader__loading {
  font-family: 'Cinzel', serif; font-size: 0.58rem; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--text-muted, #9a9aae);
  animation: br-pulse 1.4s ease-in-out infinite;
}
@keyframes br-pulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 0.9; } }

.bookreader__controls {
  display: flex; align-items: center; justify-content: center; gap: 1.4rem;
  padding-top: 0.85rem;
}
.bookreader__nav {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid rgba(201, 151, 58, 0.4); background: rgba(255, 255, 255, 0.03);
  color: var(--gold-pale, #f5dfa0); font-size: 1.5rem; line-height: 1; cursor: pointer;
  transition: background 0.3s, border-color 0.3s, transform 0.3s, opacity 0.3s;
}
.bookreader__nav:hover:not(:disabled),
.bookreader__nav:focus-visible:not(:disabled) {
  background: rgba(201, 151, 58, 0.16); border-color: var(--gold, #c9973a);
  transform: scale(1.08); outline: none;
}
.bookreader__nav:disabled { opacity: 0.3; cursor: default; }

.bookreader__counter {
  font-family: 'Cinzel', serif; font-size: 0.6rem; letter-spacing: 0.18em;
  color: var(--text-muted, #9a9aae); min-width: 8.5em; text-align: center;
}
.bookreader__tier {
  position: absolute; right: 0.6rem; bottom: 0.4rem;
  font-family: 'Cinzel', serif; font-size: 0.48rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: rgba(154, 154, 174, 0.45); pointer-events: none;
}

/* StPageFlip host */
.stf-book { margin: 0 auto; }
.stf-book img { width: 100%; height: 100%; display: block; }

@media (max-width: 640px) {
  .bookreader__shell { width: 96vw; height: 94vh; }
  .bookreader__title { font-size: 0.54rem; letter-spacing: 0.16em; }
  .bookreader__counter { min-width: 7em; font-size: 0.55rem; }
}