/* Book hero — replaces the photo-frame .opening hero */
.bk-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  padding: calc(var(--nav-h) + clamp(1.5rem, 4vh, 3rem)) 4vw 6.5rem;
  background:
    radial-gradient(70% 60% at 50% 48%, #fcfaf8 0%, rgba(252, 250, 248, 0) 72%),
    linear-gradient(180deg, #f6f0ee 0%, #efe7e3 100%);
  overflow-x: clip;
}
.bk-stage {
  position: relative;
  width: min(1100px, 100%, calc((100dvh - 11rem) * 1.445));
  perspective: 2400px;
  perspective-origin: 50% 35%;
}
.bk-shadow {
  position: absolute;
  inset: 3% 1% 0 1%;
  border-radius: 6px;
  transform-origin: 0 50%;
  box-shadow: 0 26px 36px -6px rgba(60, 32, 16, 0.30), 0 6px 10px rgba(60, 32, 16, 0.16);
  pointer-events: none;
}
.bk-ground {
  position: absolute;
  left: 8%; right: 8%; bottom: -5%; height: 10%;
  border-radius: 50%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(60, 30, 15, 0.22), rgba(60, 30, 15, 0) 100%);
  filter: blur(12px);
  pointer-events: none;
}
.bk-book {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 888fr) minmax(0, 899fr);
  transform-style: preserve-3d;
}
.bk-right { position: relative; transform-style: preserve-3d; }
.bk-page {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  container-type: inline-size;
  outline: none;
}
.bk-page--left {
  aspect-ratio: 888 / 1237;
  padding: 15.5% 9.5% 17% 13%;
  background: url(../media/book/open-left-1x.jpg) 0 0 / 100% 100% no-repeat, #efe4cc;
  border-radius: 3px 0 0 3px;
}
.bk-page--right {
  height: 100%;
  aspect-ratio: 899 / 1237;
  padding: 15.5% 14% 17% 9%;
  background: url(../media/book/open-right-1x.jpg) 100% 0 / 100% 100% no-repeat, #efe4cc;
  border-radius: 0 3px 3px 0;
}
.bk-text {
  font-family: "Cormorant Garamond", Palatino, "Palatino Linotype", Georgia, serif;
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1rem, 4.6cqw, 1.45rem);
  line-height: 1.72;
  letter-spacing: 0.004em;
  color: #000000;
  text-wrap: pretty;
}
.bk-text p { margin: 0 0 0.95em; color: #000000; }
.bk-text p:last-child { margin-bottom: 0; }
.bk-dup { display: none; }
.bk-shade {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(40, 20, 10, 0.55) 0%, rgba(40, 20, 10, 0.28) 40%, rgba(40, 20, 10, 0.08) 100%);
}

.bk-cover {
  position: absolute;
  top: -0.4%; bottom: -0.4%; left: 0; right: -0.6%;
  transform-origin: 0 50%;
  transform: rotateY(-180deg);
  transform-style: preserve-3d;
  visibility: hidden;
  pointer-events: none;
}
.bk-cover-edge {
  position: absolute;
  top: 0.6%; bottom: 0.6%; right: 0;
  width: 9px;
  transform-origin: 100% 50%;
  transform: rotateY(90deg);
  background: linear-gradient(180deg, #3e2a1d, #5e4230 50%, #3e2a1d);
  box-shadow: inset 0 0 0 1px rgba(20, 10, 5, 0.55);
}
.bk-cover-front,
.bk-cover-back {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.bk-cover-front {
  container-type: inline-size;
  background: #5a3a2a;
  border-radius: 2px 6px 6px 2px;
  overflow: hidden;
}
/* Cover plate is burgundy in the photo; shift it to the palette's warm brown without touching the gold title. */
.bk-cover-front::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url(../media/book/cover-1x.jpg) 0 0 / 100% 100% no-repeat;
  filter: hue-rotate(28deg) saturate(0.55) brightness(1.02);
  border-radius: inherit;
}
.bk-cover-back {
  transform: rotateY(180deg);
  background: url(../media/book/open-left-1x.jpg) 0 0 / 100% 100% no-repeat, #efe4cc;
  border-radius: 3px 0 0 3px;
}
@media (min-resolution: 1.5dppx), (min-width: 1200px) {
  .bk-page--left { background-image: url(../media/book/open-left.jpg); }
  .bk-page--right { background-image: url(../media/book/open-right.jpg); }
  .bk-cover-front::before { background-image: url(../media/book/cover.jpg); }
  .bk-cover-back { background-image: url(../media/book/open-left.jpg); }
}
.bk-title {
  z-index: 2;
  position: absolute;
  left: 6%; right: 9%; top: 32.5%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  font-family: "Cormorant Garamond", Palatino, Georgia, serif;
  font-size: 10cqw;
  filter: drop-shadow(0 0.08em 0 rgba(25, 5, 9, 0.75)) drop-shadow(0 -0.03em 0 rgba(255, 228, 190, 0.22)) drop-shadow(0 0.12em 0.14em rgba(15, 3, 6, 0.35));
}
.bk-title-by,
.bk-title-name {
  display: block;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.bk-title-by {
  font-weight: 500;
  font-size: 0.55em;
  letter-spacing: 0.035em;
  line-height: 1.15;
  margin-bottom: 0.28em;
  background-image: linear-gradient(180deg, #f4e2b0 0%, #d9b777 45%, #b28a4a 70%, #e3c68b 100%);
}
.bk-title-name {
  font-weight: 600;
  font-size: 1em;
  letter-spacing: 0.004em;
  line-height: 1.05;
  padding: 0 0.15em;
  white-space: nowrap;
  background-image: linear-gradient(180deg, #f6e5b4 0%, #dbba7b 42%, #b08746 68%, #e6ca90 100%);
}
.bk-cover-shade {
  z-index: 1;
  position: absolute;
  inset: 0;
  opacity: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(15, 3, 6, 0.15), rgba(15, 3, 6, 0.55));
}
.bk-cover-shade--back { background: linear-gradient(270deg, rgba(40, 20, 10, 0.35), rgba(40, 20, 10, 0.6)); }

.bk-controls {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.bk-skip {
  background: transparent;
  border: 1px solid var(--line-firm);
  border-radius: 2px;
  color: var(--ink);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
  padding: 0.6rem 1rem;
  min-height: 44px;
  cursor: pointer;
  transition: border-color 0.3s var(--ease);
}
.bk-skip:hover { border-color: var(--ink); }
.bk-skip[hidden] { display: none; }

/* Closed pose, set before first paint by the inline head script */
.bk-pre .bk-cover { visibility: visible; transform: rotateY(0deg); }
.bk-pre .bk-page--left { opacity: 0; }
.bk-writing .bk-ch { opacity: 0; }

@media (max-width: 719px) {
  .bk-stage { width: min(460px, 100%); }
  .bk-book { grid-template-columns: minmax(0, 1fr); }
  .bk-page--left { display: none; }
  .bk-dup { display: block; }
  .bk-page--right { padding: 17% 14% 19% 11%; }
  .bk-text { font-size: clamp(0.92rem, 4.35cqw, 1.12rem); line-height: 1.58; }
  .bk-text p { margin-bottom: 0.7em; }
}
@media (min-width: 720px) {
  .bk-pre .bk-book { transform: translateX(-25%); }
  .bk-pre .bk-shadow { transform: translateX(-25%) scaleX(0.5); }
}