html,
body {
  margin: 0;
  height: 100%;
  overflow: clip;
  background: #0b0806;
}
.c3r-container.c3r-container {
  position: fixed;
  inset: 0;
  --c3r-viewport-height: 100svh;
}
/* On transform, never on the camera's custom properties: those restyle every frame, 10 fps */
.c3r-view {
  transition: transform 1.7s cubic-bezier(0.5, 0, 0.15, 1);
}
/* Closing, on the shut state: the cover shuts, the book turns while it is clear of the shelf, then slides home.
   A separate translate, one transform would interpolate them together through the neighbours */
.c3r-group.book {
  translate: 0 0 0;
  transition:
    transform 0.5s 0.55s cubic-bezier(0.3, 0, 0.2, 1),
    translate 0.55s 1.05s cubic-bezier(0.3, 0, 0.2, 1);
}
.c3r-group.book:has(details[open]) {
  transition:
    translate 0.45s cubic-bezier(0.3, 0, 0.2, 1),
    transform 0.5s 0.4s cubic-bezier(0.3, 0, 0.2, 1);
}
.c3r-group.hinge {
  transform: rotateY(0deg);
  transition: transform 0.55s cubic-bezier(0.3, 0, 0.2, 1);
}
.book:has(details[open]) .c3r-group.hinge {
  transform: rotateY(-180deg);
  transition: transform 0.7s 0.85s cubic-bezier(0.3, 0, 0.2, 1);
}
/* Shades are baked for the shelf pose, and this book has left it */
.book:has(details[open]) .c3r-polygon-content {
  --c3r-flat-backdrop: #fff !important;
}
/* Hides only once the book is home. Not display: Firefox doesn't hold a transition of it, and the cover would vanish as closing starts */
.closed-off {
  visibility: hidden;
  transition: visibility 0s 1.65s;
}
.book:has(details[open]) .closed-off {
  visibility: visible;
  transition: none;
}
.c3r-element {
  transform-style: preserve-3d;
}
/* Only the shut book's spine needs depth, and in Firefox the page's text can lose to its own background */
details.c3r-element[open] {
  transform-style: flat;
}
details {
  position: absolute;
  color: #2b2118;
  font:
    15px/1.42 Georgia,
    "Times New Roman",
    serif;
}
/* Page and plate exist only while the cover is lifted: Firefox can paint them over a shut cover, a plane away.
   Open, they wait for the hinge. Closing, they go when the cover is nearly down, sooner and the book looks hollow */
details.c3r-element {
  transition:
    background 0s 0.25s allow-discrete,
    box-shadow 0s 0.25s;
}
details.c3r-element[open] {
  background: url(assets/paper.jpg) 0 0/256px;
  box-shadow:
    inset 26px 0 26px -18px #0006,
    0 0 0 8px #2c1a10;
  transition:
    background 0s 0.85s allow-discrete,
    box-shadow 0s 0.85s;
}
details.c3r-element[open] .text {
  animation: hold-hidden 0.85s step-end;
}
@keyframes hold-hidden {
  from {
    visibility: hidden;
  }
}
.plate {
  backface-visibility: hidden;
  visibility: hidden;
  transition: visibility 0s 0.25s;
}
.book:has(details[open]) .plate {
  visibility: visible;
  transition: visibility 0s 0.85s;
}
.plate {
  display: flex;
  background: url(assets/paper.jpg) 0 0/256px;
  box-shadow:
    inset -26px 0 26px -18px #0006,
    0 0 0 8px #2c1a10;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: #5a3b1c;
  font:
    18px Georgia,
    "Times New Roman",
    serif;
  text-align: center;
  box-sizing: border-box;
  padding: 0 44px;
}
.plate::before {
  content: attr(data-t);
  font:
    italic 700 36px/1.15 Georgia,
    "Times New Roman",
    serif;
}
.plate i {
  display: block;
  width: 90px;
  height: 9px;
  border-block: 1px solid #8a6a3c;
}
.plate::after {
  content: attr(data-a) "\A" attr(data-v);
  white-space: pre;
  line-height: 1.6;
}
summary {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--w);
  height: 100%;
  display: block;
  list-style: none;
  cursor: pointer;
  pointer-events: auto;
  transform-origin: 0 50%;
  transform: rotateY(90deg) translateZ(0.5px);
  outline-offset: -3px;
}
summary::-webkit-details-marker {
  display: none;
}
summary:focus-visible {
  outline: 3px solid #ffd27a;
}
details.c3r-element[open] > summary {
  transform: none;
  z-index: 1;
  left: auto;
  right: 0;
  top: 0;
  width: 44px;
  height: 44px;
  background: none;
}
details.c3r-element[open] > summary::after {
  content: "\00d7";
  display: block;
  text-align: center;
  font:
    26px/44px Georgia,
    serif;
  color: #6b5a44;
}
.text {
  position: absolute;
  inset: 0;
  padding: 22px 30px 18px;
  box-sizing: border-box;
  overflow: clip;
  user-select: text;
  -webkit-user-select: text;
  pointer-events: auto;
}
.text h2 {
  font:
    italic 700 17px Georgia,
    serif;
  margin: 0 26px 10px 0;
  color: #5a3b1c;
}
.text p {
  margin: 0 0 0.6em;
  text-align: justify;
  hyphens: auto;
}
::selection {
  background: #ffcf57;
}
#dim {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(#0000 76%, #000a);
  opacity: 0;
  transition: opacity 0.9s;
}
.c3r-container:has(details[open]) ~ #dim {
  opacity: 1;
}
#cat {
  position: fixed;
  z-index: 3;
  right: 10px;
  bottom: max(10px, env(safe-area-inset-bottom));
  color: #eadcc2;
  font:
    15px Georgia,
    serif;
  max-height: 70%;
  display: flex;
  flex-direction: column-reverse;
}
#cat summary {
  position: static;
  transform: none;
  width: auto;
  height: auto;
  background: #2a1a10e0;
  padding: 10px 16px;
  border-radius: 22px;
  text-align: center;
  min-height: 24px;
  line-height: 24px;
}
#cat .list {
  background: #1c120cf2;
  padding: 8px;
  margin-bottom: 6px;
  border-radius: 12px;
  max-height: 58vh;
  width: min(320px, 80vw);
  overflow-y: auto;
  overscroll-behavior: contain;
}
#cat a {
  display: block;
  color: inherit;
  text-decoration: none;
  padding: 12px 10px;
  border-bottom: 1px solid #fff1;
}
#cat a:hover,
#cat a:focus-visible {
  background: #fff1;
}
#cat a::before {
  content: attr(data-t);
}
#hint {
  position: fixed;
  z-index: 2;
  left: 50%;
  top: max(10px, env(safe-area-inset-top));
  translate: -50%;
  color: #eadcc2;
  font:
    14px Georgia,
    serif;
  background: #000a;
  padding: 8px 16px;
  border-radius: 16px;
  width: max-content;
  max-width: 88vw;
  text-align: center;
  pointer-events: none;
  transition: opacity 0.4s;
}
#hint b {
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.04em;
  margin-right: 0.6em;
  color: #ffd27a;
}
#hint::after {
  content: attr(data-hint);
}
.c3r-container:has(details[open]) ~ #hint {
  opacity: 0;
}