/* Volume stationery: pearl ink, engraved contours, and a matching foil signature.
   Reveal transforms stay in app.css. Only the printed surface changes here. */
.card,
.shop-cardback {
  --back-paper: #211722;
  --back-ink: 241 216 229;
  --back-pearl: 238 185 216;
  --back-cool: 166 204 233;
  --back-warm: 234 216 171;
  --back-orbit-radius: 47% 53% 49% 51% / 53% 44% 56% 47%;
}

.card[data-volume="gyatts"],
.shop-cardback[data-volume="gyatts"] {
  --back-paper: #302022;
  --back-ink: 247 223 207;
  --back-pearl: 244 181 157;
  --back-cool: 144 221 208;
  --back-warm: 242 182 132;
  --back-orbit-radius: 44% 56% 46% 54% / 57% 51% 49% 43%;
}

.card[data-volume="realgirls"],
.shop-cardback[data-volume="realgirls"] {
  --back-paper: #192b27;
  --back-ink: 233 235 214;
  --back-pearl: 182 219 195;
  --back-cool: 163 196 221;
  --back-warm: 232 191 150;
  --back-orbit-radius: 46% 54% 48% 52% / 55% 43% 57% 45%;
}

.card.is-face-down {
  border-color: rgb(var(--back-pearl) / 50%);
  background: var(--back-paper);
}

.card-back {
  --back-light-x: var(--glare-x, var(--material-rest-x));
  --back-light-y: var(--glare-y, var(--material-rest-y));
  --back-light-angle: var(--card-ry, var(--material-card-angle));
  padding: 9px;
  border-color: rgb(var(--back-pearl) / 50%);
  background:
    radial-gradient(ellipse at 8% 0%, rgb(var(--back-pearl) / 20%), transparent 53%),
    radial-gradient(ellipse at 94% 95%, rgb(var(--back-cool) / 16%), transparent 54%),
    linear-gradient(145deg, rgb(var(--back-warm) / 5%), transparent 40% 62%, rgb(var(--back-pearl) / 9%)),
    var(--back-paper);
  color: rgb(var(--back-ink));
  isolation: isolate;
}

/* A broad interference band follows the existing card pointer coordinates. */
.card-back::before {
  position: absolute;
  z-index: 2;
  inset: 0;
  border-radius: inherit;
  background:
    radial-gradient(ellipse at var(--back-light-x) var(--back-light-y), rgb(var(--back-ink) / 11%), transparent 47%),
    conic-gradient(from calc(118deg + var(--back-light-angle)) at var(--back-light-x) var(--back-light-y),
      transparent 0deg 32deg, rgb(var(--back-pearl) / 12%) 67deg,
      rgb(var(--back-cool) / 15%) 105deg, rgb(var(--back-warm) / 8%) 143deg,
      transparent 186deg 230deg, rgb(var(--back-pearl) / 8%) 275deg,
      transparent 320deg 360deg);
  mix-blend-mode: screen;
  pointer-events: none;
  content: "";
}

.card-back-frame {
  isolation: isolate;
  border-color: rgb(var(--back-ink) / 37%);
  border-radius: 10px;
  background:
    radial-gradient(ellipse at 50% 43%, rgb(var(--back-pearl) / 8%), transparent 42%),
    linear-gradient(145deg, rgb(var(--back-pearl) / 3%), transparent 50%, rgb(var(--back-warm) / 4%));
  box-shadow:
    inset 0 0 0 4px var(--back-paper),
    inset 0 0 0 5px rgb(var(--back-pearl) / 16%);
}

/* The same small contour appears as a barely visible woven print. */
.card-back-frame::before {
  position: absolute;
  z-index: -1;
  inset: 12px;
  border-radius: 3px;
  background: linear-gradient(150deg,
    rgb(var(--back-pearl) / 8%), rgb(var(--back-warm) / 4%) 45%, rgb(var(--back-cool) / 8%));
  -webkit-mask-image: var(--volume-mark);
  mask-image: var(--volume-mark);
  -webkit-mask-size: 64px 55px;
  mask-size: 64px 55px;
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  -webkit-mask-position: center;
  mask-position: center;
  pointer-events: none;
  content: "";
}

/* Two hairline rules frame the edition without competing with the emblem. */
.card-back-frame::after {
  position: absolute;
  top: 13%;
  right: 19%;
  bottom: 17%;
  left: 19%;
  border-top: 1px solid rgb(var(--back-ink) / 24%);
  border-bottom: 1px solid rgb(var(--back-ink) / 20%);
  pointer-events: none;
  content: "";
}

.card-back-orbit {
  top: 43%;
  left: 50%;
  width: 65%;
  transform: translate(-50%, -50%) rotate(-13deg);
  border-color: rgb(var(--back-pearl) / 32%);
  border-radius: var(--back-orbit-radius);
  background: radial-gradient(ellipse, var(--back-paper) 14%, rgb(var(--back-pearl) / 3%) 58%, transparent 74%);
  box-shadow:
    0 0 24px rgb(var(--back-pearl) / 4%),
    inset 0 0 18px rgb(var(--back-cool) / 4%);
}

.card-back-orbit::before,
.card-back-orbit::after {
  inset: 7% -4%;
  border-color: rgb(var(--back-warm) / 20%);
  border-radius: var(--back-orbit-radius);
  transform: rotate(53deg);
}

.card-back-orbit::after {
  inset: -3% 8%;
  border-color: rgb(var(--back-cool) / 24%);
  transform: rotate(-36deg);
}

:is(.card, .shop-cardback)[data-volume="gyatts"] .card-back-orbit {
  transform: translate(-50%, -50%) rotate(15deg);
  border-radius: 46% 46% 38% 38%;
}

:is(.card, .shop-cardback)[data-volume="realgirls"] .card-back-orbit {
  transform: translate(-50%, -50%) rotate(-24deg);
}

.card-back .volume-signature {
  position: absolute;
  z-index: 1;
  top: 43%;
  left: 50%;
  display: grid;
  width: 48%;
  max-width: 155px;
  justify-items: center;
  gap: 0;
  opacity: .9;
  transform: translate(-50%, -50%) rotate(-5deg);
  filter: none;
}

.card-back .volume-signature-mark {
  display: block;
  width: 78%;
  height: auto;
  aspect-ratio: 1.3;
  background: linear-gradient(133deg,
    rgb(var(--back-ink) / 74%) 6%, rgb(var(--back-pearl) / 89%) 27%,
    rgb(var(--back-cool) / 75%) 48%, rgb(var(--back-ink)) 63%,
    rgb(var(--back-warm) / 84%) 77%, rgb(var(--back-pearl) / 78%));
  filter: drop-shadow(0 1px 0 rgb(255 255 255 / 14%)) drop-shadow(0 3px 8px rgb(var(--back-pearl) / 12%));
}

.card-back .volume-signature-word {
  font-size: clamp(21px, 2.5vw, 33px);
  line-height: 1.2;
  letter-spacing: -.035em;
  background: linear-gradient(120deg, rgb(var(--back-ink)), rgb(var(--back-pearl)) 40%, rgb(var(--back-cool)) 70%, rgb(var(--back-warm)));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
}

.card-back .card-back-edition {
  position: absolute;
  right: 0;
  bottom: 21%;
  left: 0;
  margin: 0;
  padding: 0 18px;
  gap: 5px;
  color: rgb(var(--back-ink) / 96%);
  font-size: 13px;
  letter-spacing: .16em;
}

.card-back-edition [data-card-back-archive] {
  color: rgb(var(--back-ink) / 88%);
  font-size: 11px;
  letter-spacing: .08em;
  overflow-wrap: anywhere;
}

.card-back small {
  bottom: 7%;
  color: rgb(var(--back-ink) / 88%);
  font-size: 11px;
  letter-spacing: .12em;
}

@media (max-height: 500px) and (max-width: 760px), (max-height: 500px) and (pointer: coarse) {
  .results-view .card-back .volume-signature { top: 18%; }
  .results-view .card-back .volume-signature-mark { width: 68%; }
  .results-view .card-back .volume-signature-word { font-size: 18px; }
}

.card-back:focus-visible {
  outline: 2px solid rgb(var(--back-ink));
  outline-offset: -4px;
}

/* Keep the foil static on constrained devices; reveal behavior stays intact. */
.is-performance-lite .card-back::before {
  display: none;
}

.is-performance-lite .card-back .volume-signature-mark {
  filter: none;
}

[data-material="emboss"] .card-back .volume-signature {
  opacity: .58;
  filter: drop-shadow(0 -1px .3px rgb(var(--back-ink) / 45%)) drop-shadow(0 1px .4px rgb(0 0 0 / 45%));
}

[data-material="emboss"] .card-back .volume-signature-mark {
  background: rgb(var(--back-ink) / 50%);
  filter: none;
}

[data-material="emboss"] .card-back .volume-signature-word {
  background-image: linear-gradient(rgb(var(--back-ink) / 65%), rgb(var(--back-ink) / 35%));
}

@media (prefers-reduced-motion: reduce) {
  .card-back {
    --back-light-x: var(--material-rest-x);
    --back-light-y: var(--material-rest-y);
    --back-light-angle: var(--material-card-angle);
  }

  .card.is-face-down.is-reveal-ready .card-back {
    animation: none;
  }
}

/* Shop miniatures share the reveal surface, scaled as a complete piece of stationery. */
.shop-cardback {
  --volume-mark: url('/assets/volume-boobies.svg?v=8ddcb90451c6');
  position: relative;
  width: 104px;
  height: 158px;
  border-radius: 10px;
  filter: drop-shadow(0 12px 12px rgb(0 0 0 / 28%));
  pointer-events: none;
}
.shop-cardback[data-volume="gyatts"] {
  --volume-mark: url('/assets/volume-gyatts.svg?v=8ddcb90451c6');
}
.shop-cardback[data-volume="realgirls"] {
  --volume-mark: url('/assets/volume-realgirls.svg?v=8ddcb90451c6');
}
.shop-cardback .card-back {
  width: 200px;
  height: 304px;
  border-radius: 18px;
  opacity: 1;
  visibility: visible;
  transform: scale(.52);
  transform-origin: top left;
  cursor: default;
}
.shop-cardback .volume-signature-word { font-size: 33px; }
@media (max-width: 760px), (pointer: coarse) {
  .shop-cardback { width: 80px; height: 122px; }
  .shop-cardback .card-back { transform: scale(.4); }
}

/* Approved stationery for the pending content volumes. */
:is(.card, .shop-cardback)[data-volume="latinas"] {
  --back-paper:#352022;
  --back-ink:255 232 207;
  --back-pearl:244 170 139;
  --back-cool:174 213 171;
  --back-warm:247 206 125;
  --back-orbit-radius:48% 52% 46% 54% / 45% 43% 57% 55%;
  --volume-mark: url('/assets/volume-latinas.svg?v=8ddcb90451c6');
}
:is(.card, .shop-cardback)[data-volume="asiansgonewild"] {
  --back-paper:#24233b;
  --back-ink:242 232 255;
  --back-pearl:222 171 231;
  --back-cool:156 218 245;
  --back-warm:246 189 215;
  --back-orbit-radius:49% 51% 48% 52% / 58% 49% 51% 42%;
  --volume-mark: url('/assets/volume-asiansgonewild.svg?v=8ddcb90451c6');
}
:is(.card, .shop-cardback)[data-volume="gothsluts"] {
  --back-paper:#1b1823;
  --back-ink:227 221 242;
  --back-pearl:178 159 211;
  --back-cool:164 193 209;
  --back-warm:172 99 137;
  --back-orbit-radius:46% 54% 49% 51% / 53% 43% 57% 47%;
  --volume-mark: url('/assets/volume-gothsluts.svg?v=8ddcb90451c6');
}
:is(.card, .shop-cardback)[data-volume="asiansgonewild"] .card-back .volume-signature { width: 69%; }
:is(.card, .shop-cardback)[data-volume="asiansgonewild"] .card-back .volume-signature-mark { width: 62%; }
.card[data-volume="asiansgonewild"] .card-back .volume-signature-word { font-size: clamp(18px, 2vw, 26px); }
.shop-cardback[data-volume="asiansgonewild"] .card-back .volume-signature-word { font-size: 19px; }
:is(.card, .shop-cardback)[data-volume="gothsluts"] .card-back .volume-signature-word { font-size: 24px; }