/* ============================================================
   The Reading Room: the 3D book preview & borrowing card
   ============================================================ */

/* ───────────────────────── modal shell ───────────────────────── */

.book-modal {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: none;
}
.book-modal.show { display: block; }

.book-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 12, 28, 0.72);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  opacity: 0;
  transition: opacity .3s var(--ease);
}
.book-modal.show .book-modal-backdrop { opacity: 1; }

.book-modal-scroll {
  position: relative;
  height: 100%;
  overflow-y: auto;
  padding: clamp(16px, 4vh, 56px) var(--pad);
  display: flex;
  justify-content: center;
}

.book-modal-panel {
  position: relative;
  background: var(--paper);
  border-radius: 14px;
  width: min(980px, 100%);
  height: fit-content;
  min-height: min(600px, 82vh);
  box-shadow: 0 40px 90px -20px rgba(10,8,5,.55);
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  overflow: hidden;
  opacity: 0;
  transform: scale(.9) translateY(24px);
  transition: opacity .38s var(--ease), transform .42s var(--bounce);
}
.book-modal.show .book-modal-panel { opacity: 1; transform: none; }

@media (max-width: 820px) {
  .book-modal-panel { grid-template-columns: 1fr; }
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 20;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: .15s var(--ease);
}
.modal-close:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ───────────────────────── stage (left column) ───────────────────────── */

.book-stage {
  background:
    radial-gradient(ellipse at 50% 20%, rgba(255,255,255,.5), transparent 60%),
    var(--paper-deep);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(28px, 4vw, 46px) clamp(20px, 3vw, 36px);
  gap: 22px;
  min-height: 480px;
}

.reading-progress {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: .02em;
}

/* ── closed book (cuboid) ── */

.book-closed {
  position: relative;
  perspective: 1800px;
  width: 100%;
  display: flex;
  justify-content: center;
  animation: idleBob 3.4s ease-in-out infinite;
}

@keyframes idleBob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.book-closed::before {
  content: "";
  position: absolute;
  bottom: 6%;
  left: 50%;
  width: 55%;
  height: 22px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(108,60,233,.28), transparent 70%);
  animation: glowPulse 3.4s ease-in-out infinite;
  z-index: -1;
}

@keyframes glowPulse {
  0%, 100% { opacity: .55; transform: translateX(-50%) scale(1); }
  50% { opacity: .9; transform: translateX(-50%) scale(1.15); }
}

.cover3d {
  width: min(250px, 62vw);
  aspect-ratio: 3 / 4.15;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateY(-26deg) rotateX(2deg);
  transition: transform .5s var(--ease), opacity .45s var(--ease);
  cursor: pointer;
}
.cover3d:hover { transform: rotateY(-32deg) rotateX(2deg) translateY(-3px); }
.cover3d:focus-visible { outline: 2px solid var(--brass); outline-offset: 6px; }

.cover3d .front-face {
  position: absolute; inset: 0;
  border-radius: 2px 4px 4px 2px;
  box-shadow: -16px 14px 34px -16px rgba(20,15,8,.5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px 18px;
  overflow: hidden;
}
.cover3d .front-face::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(255,255,255,.14), transparent 40%);
  pointer-events: none;
  z-index: 1;
}

.cover3d .cover-art-slot {
  position: absolute;
  inset: 12%;
  z-index: 0;
  pointer-events: none;
}
.cover3d .cover-art-slot svg { width: 100%; height: 100%; color: rgba(255,255,255,.5); }

.cover3d .emblem { width: 30px; height: 30px; color: rgba(255,255,255,.8); position: relative; z-index: 2; }

.cover3d .cover-title {
  font-family: var(--serif);
  color: #fff;
  font-size: 19px;
  line-height: 1.16;
  font-weight: 600;
  text-shadow: 0 1px 4px rgba(0,0,0,.35);
}
.cover3d .cover-author {
  font-family: var(--mono);
  color: rgba(255,255,255,.75);
  font-size: 10.5px;
  letter-spacing: .04em;
  margin-top: 8px;
}

.cover3d .spine-edge {
  position: absolute; left: 0; top: 0; bottom: 0; width: 16px;
  background: linear-gradient(90deg, rgba(0,0,0,.4), rgba(0,0,0,.05));
  transform: translateX(-15px) rotateY(90deg);
  transform-origin: right;
  border-radius: 2px 0 0 2px;
}
.cover3d .pages-edge {
  position: absolute; right: -9px; top: 5px; bottom: 5px; width: 9px;
  background: repeating-linear-gradient(#FBF6E8, #FBF6E8 1px, #E4DAB9 1px, #E4DAB9 2px);
  transform: rotateY(90deg);
  transform-origin: left;
  border-radius: 0 1px 1px 0;
}

.book-closed.opening .cover3d { animation: swingOpen .55s var(--ease) forwards; }
@keyframes swingOpen {
  0% { transform: rotateY(-26deg) rotateX(2deg); }
  60% { transform: rotateY(-110deg) rotateX(2deg); }
  100% { transform: rotateY(-70deg) rotateX(2deg); opacity: 0; }
}

.open-hint {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  text-align: center;
}

/* ── open reader (page turning) ── */

.book-reader { display: none; width: 100%; flex-direction: column; align-items: center; gap: 18px; }
.book-reader.show { display: flex; animation: readerIn .5s var(--ease); }
@keyframes readerIn { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }

.spread {
  perspective: 2600px;
  display: flex;
  width: min(480px, 100%);
  aspect-ratio: 8/5;
  border-radius: 3px;
  box-shadow: 0 22px 50px -20px rgba(20,15,8,.5);
}

.spread { overflow: visible; }

.page-col {
  width: 50%;
  position: relative;
  background: #FBF6E8;
}
.page-col.left { border-radius: 3px 0 0 3px; box-shadow: inset -8px 0 16px -12px rgba(0,0,0,.28); overflow: hidden; }
.page-col.right { border-radius: 0 3px 3px 0; box-shadow: inset 8px 0 16px -12px rgba(0,0,0,.22); transform-style: preserve-3d; }

.leaf {
  position: absolute; inset: 0;
  transform-style: preserve-3d;
  transform-origin: left center;
  transform: rotateY(0deg);
  transition: transform .7s cubic-bezier(.45,.05,.2,1);
}
.leaf.flipped { transform: rotateY(-180deg); }

.leaf-face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  background: #FBF6E8;
  padding: clamp(16px, 3vw, 26px) clamp(14px, 2.6vw, 22px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: 2px;
}
.leaf-face.back { transform: rotateY(180deg); }
.leaf-face::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.06), transparent 10%);
  pointer-events: none;
}
.leaf-face.back::before { background: linear-gradient(270deg, rgba(0,0,0,.06), transparent 10%); }

.static-plate {
  position: absolute; inset: 0;
  background: #F6F0DC;
  z-index: 0;
  padding: clamp(16px, 3vw, 26px) clamp(14px, 2.6vw, 22px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  border-radius: 2px;
}

.page-text {
  font-family: var(--serif);
  font-size: 12.5px;
  line-height: 1.62;
  color: var(--ink);
  white-space: pre-wrap;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}
.page-text::first-letter {
  font-size: 2.3em;
  font-weight: 600;
  line-height: .8;
  float: left;
  padding: 2px 5px 0 0;
  color: var(--brass);
}
.page-text.no-dropcap::first-letter { all: unset; }

.page-heading {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--ink-3);
  margin-bottom: 10px;
}

.title-plate {
  font-family: var(--serif);
}
.title-plate .tp-title { font-size: 21px; font-weight: 600; line-height: 1.15; margin-bottom: 8px; }
.title-plate .tp-author { font-family: var(--mono); font-size: 11px; color: var(--ink-2); margin-bottom: 18px; }
.title-plate .tp-rule { width: 34px; height: 2px; background: var(--brass); margin: 0 auto 18px; }
.title-plate .tp-edition { font-size: 11px; color: var(--ink-3); font-style: italic; }

.exlibris {
  border: 1px solid var(--line);
  padding: 16px;
  width: 84%;
}
.exlibris .el-mark { font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em; color: var(--brass-text); margin-bottom: 10px; }
.exlibris .el-name-line { border-bottom: 1px solid var(--ink-3); height: 20px; margin: 14px auto; width: 70%; }
.exlibris p { font-family: var(--serif); font-style: italic; font-size: 12px; color: var(--ink-2); margin: 0; }

.due-card {
  border: 1px solid var(--ink-3);
  width: 90%;
  font-family: var(--mono);
}
.due-card .dc-head { font-size: 10px; letter-spacing: .04em; color: var(--ink-2); border-bottom: 1px solid var(--ink-3); padding-bottom: 6px; margin-bottom: 8px; }
.due-card table { width: 100%; border-collapse: collapse; font-size: 10.5px; }
.due-card td { padding: 5px 2px; border-bottom: 1px dotted var(--line); color: var(--ink-3); }
.due-card td.stamped { color: var(--clay); font-weight: 600; }

.end-plate .ep-label { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: .04em; margin-bottom: 8px; }
.end-plate p { font-family: var(--serif); font-size: 14px; color: var(--ink-2); max-width: 22ch; }

.reader-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}
.reader-controls button {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: .15s var(--ease);
}
.reader-controls button:hover:not(:disabled) { border-color: var(--brass); color: var(--brass); }
.reader-controls button:disabled { opacity: .35; cursor: not-allowed; }
.reader-controls button svg { width: 15px; height: 15px; }

.close-book-btn {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  background: none;
  border: none;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.close-book-btn:hover { color: var(--ink-2); }

/* ───────────────────────── info panel (right column) ───────────────────────── */

.book-panel {
  --accent: var(--green);
  padding: clamp(26px, 3.4vw, 40px) clamp(24px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.book-panel .genre-tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .03em;
  margin-bottom: 8px;
}

.book-panel #bmBorrowBtn {
  background: linear-gradient(120deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #7C4DFF));
}

.book-panel h2 {
  font-family: var(--serif);
  font-size: clamp(22px, 2.4vw, 27px);
  font-weight: 600;
  line-height: 1.14;
  margin: 0 0 6px;
  letter-spacing: -.01em;
}

.book-panel .by { font-size: 13.5px; color: var(--ink-2); margin-bottom: 16px; }

.book-panel .blurb {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
  margin-bottom: 18px;
}

.meta-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}
.meta-item .k { font-family: var(--mono); font-size: 10px; color: var(--ink-3); margin-bottom: 3px; }
.meta-item .v { font-size: 13px; color: var(--ink); font-weight: 600; }

/* ── library card / borrow widget ── */

.card-widget {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card);
  padding: 18px;
  position: relative;
  overflow: hidden;
}
.card-widget .cw-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.card-widget .cw-title { font-family: var(--serif); font-size: 15px; font-weight: 600; }
.card-widget .cw-avail {
  font-family: var(--mono); font-size: 10.5px;
  display: flex; align-items: center; gap: 6px; color: var(--ink-2);
}
.card-widget .cw-avail .dot { width: 6px; height: 6px; border-radius: 50%; background: #4C8A5E; }
.card-widget .cw-avail.out .dot { background: var(--clay); }
.card-widget .cw-avail.out { color: var(--clay); }

.name-field { margin-bottom: 12px; }
.name-field label {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  margin-bottom: 6px;
  letter-spacing: .02em;
}
.name-field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-bottom: 2px solid var(--ink-3);
  background: var(--paper);
  border-radius: 2px;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s var(--ease);
}
.name-field input:focus { border-bottom-color: var(--brass); }
.name-field input:disabled { opacity: .6; cursor: not-allowed; }
.name-field .field-error {
  font-size: 11.5px;
  color: var(--clay);
  margin-top: 6px;
  display: none;
}
.name-field.error input { border-bottom-color: var(--clay); }
.name-field.error .field-error { display: block; }

.card-widget .cw-note {
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 10px;
  line-height: 1.5;
}

.loan-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.loan-status .ls-text { font-size: 13px; line-height: 1.5; }
.loan-status .ls-due { font-family: var(--mono); color: var(--clay); font-weight: 600; }

/* stamp burst effect */
.stamp-burst {
  position: absolute;
  top: 50%; left: 50%;
  width: 92px; height: 92px;
  margin: -46px 0 0 -46px;
  border: 3px solid var(--clay);
  border-radius: 50%;
  color: var(--clay);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: .04em;
  text-align: center;
  transform: scale(2.6) rotate(-18deg);
  opacity: 0;
  pointer-events: none;
  z-index: 30;
}
.stamp-burst.go {
  animation: stampSlam .55s cubic-bezier(.2,1.3,.4,1) forwards;
}
@keyframes stampSlam {
  0% { transform: scale(2.6) rotate(-18deg); opacity: 0; }
  55% { transform: scale(.94) rotate(-12deg); opacity: 1; }
  70% { transform: scale(1.06) rotate(-12deg); opacity: 1; }
  100% { transform: scale(1) rotate(-12deg); opacity: 0; transition-delay: .4s; }
}

@media (prefers-reduced-motion: reduce) {
  .book-closed.opening .cover3d { animation: none; opacity: 0; }
  .leaf { transition: none; }
}