.transformation-book,
.branch-book {
  padding: 50px 58px 38px;
  background:
    repeating-linear-gradient(0deg, transparent 0 9px, rgba(27,42,53,0.018) 9px 10px),
    var(--paper-light);
}

.transformation-heading,
.branch-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  align-items: end;
  gap: 60px;
}

.transformation-heading h2,
.branch-heading h2 {
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: clamp(42px, 4.3vw, 66px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.transformation-heading > p:last-child,
.branch-heading > p {
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.75;
  word-break: keep-all;
}

.transformation-panels {
  margin-top: 38px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 100px minmax(0, 1fr);
  align-items: center;
  gap: 18px;
}

.source-panel,
.fiction-panel {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  background: var(--paper-deep);
  box-shadow: var(--shadow-soft);
}

.source-panel { transform: rotate(-0.45deg); }
.fiction-panel { transform: rotate(0.45deg); }

.source-panel img,
.fiction-panel img {
  width: 100%;
  height: 355px;
  object-fit: cover;
}

.panel-label {
  position: absolute;
  z-index: 2;
  top: 14px;
  left: 14px;
  padding: 7px 9px;
  color: var(--cream);
  background: rgba(24,44,62,0.82);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.source-panel figcaption,
.fiction-panel figcaption {
  padding: 20px 22px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: 14px;
}

.transformation-thread {
  position: relative;
  min-height: 170px;
  display: grid;
  place-items: center;
}

.transformation-thread::before {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  top: 50%;
  height: 1px;
  background: var(--line);
}

.transformation-thread span {
  position: absolute;
  top: calc(50% - 5px);
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
}

.transformation-thread span:nth-child(1) { left: 8px; }
.transformation-thread span:nth-child(2) { left: calc(50% - 5px); background: var(--ochre); }
.transformation-thread span:nth-child(3) { right: 8px; background: var(--rain-deep); }

.transformation-thread small {
  position: relative;
  padding: 10px;
  color: var(--ink-soft);
  background: var(--paper-light);
  font-family: var(--font-serif);
  font-style: italic;
  line-height: 1.4;
  text-align: center;
}

.provenance-line {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.branch-book {
  min-height: 720px;
}

.branch-proofs {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}

.branch-proof {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(27,42,53,0.14);
  box-shadow: 0 10px 28px rgba(27,42,53,0.1);
}

.branch-proof-a { transform: rotate(-0.35deg); }
.branch-proof-b { transform: rotate(0.35deg); }

.proof-meta {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.branch-proof img {
  width: 100%;
  height: 285px;
  object-fit: cover;
}

.proof-copy {
  padding: 20px 24px 24px;
}

.proof-copy h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.2;
}

.proof-copy p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.65;
}

.branch-caption {
  margin-top: 20px;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-align: right;
}

@media (max-width: 900px) {
  .transformation-book,
  .branch-book { padding-inline: 34px; }
  .transformation-heading,
  .branch-heading { gap: 32px; }
  .transformation-panels { grid-template-columns: 1fr 60px 1fr; }
}

@media (max-width: 760px) {
  .transformation-book,
  .branch-book { padding: 28px 18px 56px; }
  .transformation-heading,
  .branch-heading { grid-template-columns: 1fr; gap: 18px; }
  .transformation-heading h2,
  .branch-heading h2 { font-size: 37px; }
  .transformation-panels { grid-template-columns: 1fr; gap: 14px; }
  .transformation-thread { min-height: 66px; }
  .transformation-thread::before { left: 50%; right: auto; top: 4px; bottom: 4px; width: 1px; height: auto; }
  .transformation-thread span { left: calc(50% - 5px) !important; right: auto !important; }
  .transformation-thread span:nth-child(1) { top: 4px; }
  .transformation-thread span:nth-child(2) { top: calc(50% - 5px); }
  .transformation-thread span:nth-child(3) { top: auto; bottom: 4px; }
  .branch-proofs { grid-template-columns: 1fr; }
  .source-panel img,
  .fiction-panel img,
  .branch-proof img { height: 280px; }
}