.book-page .page-hero {
  isolation: isolate;
}
.book-page .page-hero::before { border-color: var(--source-text); }
.book-page .page-hero::after { color: var(--source-text); border-color: var(--source); }

.book-intro {
  max-width: var(--reading);
  margin: 0 auto;
  padding-left: clamp(1rem, 3vw, 2rem);
  border-left: 0.22rem solid var(--source);
}
.book-intro p { margin: 0 0 1.25em; }

.chapter-list {
  max-width: var(--reading);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}
.chapter-list li {
  display: grid;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
}
.chapter-list li:hover { background: linear-gradient(90deg, var(--source-wash), transparent 75%); }
.chapter-list li:last-child { border-bottom: 1px solid var(--line); }
.chapter-list .number { color: var(--source-text); font-family: Cinzel, Georgia, serif; font-size: 0.82rem; letter-spacing: 0.08em; }
.chapter-list h3 { margin: 0 0 0.25rem; font-family: "EB Garamond", Georgia, serif; font-weight: 600; }
.chapter-list p { margin: 0; color: var(--ink-soft); }

.signup-panel {
  max-width: var(--reading);
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--source);
  background: rgb(255 253 248 / 0.82);
  box-shadow: 1rem 1rem 0 var(--source-wash);
}
.signup-panel > p { max-width: 36rem; color: var(--ink-soft); }
.signup-form { display: grid; max-width: 34rem; margin-top: 2rem; gap: 1.25rem; }
.signup-form .field { display: grid; gap: 0.4rem; }
.signup-form label { font-weight: 600; }
.signup-form input[type="text"],
.signup-form input[type="email"] {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--source);
  border-radius: 0;
  color: var(--ink);
  background: var(--paper);
}
.signup-form .hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.signup-form .consent { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: 0.65rem; }
.signup-form .consent input { margin-top: 0.38rem; }
.signup-form .consent label { color: var(--ink-soft); font-size: 1rem; font-weight: 400; }
.signup-form button { justify-self: start; cursor: pointer; }
.privacy-note { max-width: 40rem; margin-top: 1.5rem; color: var(--ink-soft); font-size: 0.95rem; }
.guide-page .guide-preview { display: block; width: min(100%, 19rem); height: auto; margin-top: 2rem; border: 1px solid var(--line); }
.guide-page #newsletter, .guide-page #einblick { scroll-margin-top: 6rem; }
.site-unified.guide-page .signup-panel h2 { font-size: clamp(1.8rem, 4vw, 3rem); overflow-wrap: anywhere; hyphens: manual; }

@media (max-width: 34rem) {
  .book-intro { padding-left: 1rem; }
  .chapter-list li { grid-template-columns: 2rem minmax(0, 1fr); }
  .signup-panel { padding: 1.25rem; box-shadow: 0.45rem 0.45rem 0 var(--source-wash); }
  .signup-form button { width: 100%; }
}