:root {
  --ink: #2b241d;
  --ink-soft: #5a4f42;
  --paper: #f6ecda;
  --paper-deep: #ecdfc6;
  --red: #a3182f;
  --red-soft: #c33c4f;
  --blue: #1c3a7a;
  --blue-soft: #3a5faf;
  --gold: #a97f2f;
  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-zh: 'Noto Serif TC', serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(163,24,47,0.05), transparent 40%),
    radial-gradient(circle at 80% 60%, rgba(28,58,122,0.05), transparent 45%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-serif-zh), var(--font-serif-en), serif;
}

.infinity { display: inline-block; color: var(--gold); }

/* ---------- Reading progress ---------- */
#reading-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(0,0,0,0.06);
  z-index: 200;
}
#reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--red), var(--gold), var(--blue));
  transition: width 0.1s ease;
}

/* ---------- Top bar ---------- */
.reader-bar {
  position: sticky;
  top: 3px;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.8rem;
  background: rgba(246, 236, 218, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(169,127,47,0.2);
}

.reader-home {
  font-family: var(--font-serif-en);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
}
.reader-home:hover { color: var(--red); }

.toc-toggle {
  font-family: var(--font-serif-zh);
  background: transparent;
  border: 1px solid rgba(169,127,47,0.4);
  border-radius: 999px;
  padding: 0.45rem 1.2rem;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}
.toc-toggle:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- TOC panel ---------- */
#toc-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 14, 8, 0.35);
  z-index: 180;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
#toc-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

#toc-panel {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(340px, 84vw);
  background: var(--paper-deep);
  z-index: 190;
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(.4,0,.2,1);
  box-shadow: 10px 0 40px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
}
#toc-panel.open {
  transform: translateX(0);
}

.toc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 1.6rem;
  border-bottom: 1px solid rgba(169,127,47,0.25);
  font-weight: 600;
  letter-spacing: 0.15em;
}

.toc-head button {
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--ink-soft);
}

#toc-list {
  overflow-y: auto;
  padding: 1rem 0.6rem 2rem;
}

#toc-list a {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: 6px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.5;
  transition: background 0.25s ease, color 0.25s ease;
}
#toc-list a:hover,
#toc-list a.active {
  background: rgba(163,24,47,0.08);
  color: var(--red);
}
#toc-list a.toc-special {
  font-style: italic;
  opacity: 0.85;
  padding-left: 1.8rem;
  font-size: 0.88rem;
}

/* ---------- Novel content ---------- */
#novel-root {
  max-width: 700px;
  margin: 0 auto;
  padding: 4rem 1.6rem 8rem;
}

#novel-loading {
  text-align: center;
  padding: 6rem 0;
  color: var(--ink-soft);
  font-style: italic;
  letter-spacing: 0.1em;
}

/* ---------- Pagination: one view at a time ---------- */
.novel-cover,
.chapter-section {
  display: none;
}
.novel-cover.active,
.chapter-section.active {
  display: block;
}

/* Cover block */
.novel-cover {
  text-align: center;
  padding-bottom: 3rem;
}

.cover-start-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2.4rem;
  padding: 0.9rem 2.4rem;
  border-radius: 999px;
  text-decoration: none;
  color: #fff;
  font-size: 1.02rem;
  letter-spacing: 0.1em;
  background: linear-gradient(90deg, var(--red), var(--blue));
  box-shadow: 0 10px 30px rgba(163,24,47,0.2);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.cover-start-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(28,58,122,0.3);
}
.novel-cover h1 {
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  letter-spacing: 0.1em;
  margin: 0.5rem 0 0.8rem;
  color: var(--ink);
}
.novel-subtitle {
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--red-soft);
  letter-spacing: 0.05em;
  font-size: 1.05rem;
}

.novel-toc-block {
  max-width: 420px;
  margin: 2rem auto 0;
  text-align: left;
  color: var(--ink-soft);
  font-style: normal;
  line-height: 2.1;
  font-size: 0.98rem;
}

/* Chapter sections */
.chapter-section {
  padding: 3.2rem 0 2rem;
}

.chapter-heading {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  letter-spacing: 0.03em;
  margin-bottom: 1.8rem;
  color: var(--ink);
  position: relative;
  padding-bottom: 0.6rem;
}
.chapter-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46px;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--blue));
  border-radius: 2px;
}

.chapter-section p {
  font-size: 1.08rem;
  line-height: 2.15;
  color: #3a3226;
  margin-bottom: 1.3rem;
  letter-spacing: 0.01em;
}

.chapter-section > .chapter-body > p:first-of-type::first-letter {
  font-family: var(--font-serif-en);
  font-size: 3.2rem;
  font-weight: 600;
  float: left;
  line-height: 0.8;
  padding: 0.1rem 0.5rem 0 0;
  color: var(--red);
}

.chapter-section hr {
  border: none;
  text-align: center;
  margin: 2.4rem 0;
  color: var(--gold);
  opacity: 0.7;
}
.chapter-section hr::before {
  content: '❦';
  font-size: 1rem;
}

.chapter-section strong { color: var(--ink); }
.chapter-section em { color: var(--red-soft); }

/* Interludes (letters / dream sequences) */
.chapter-section.is-interlude {
  background: linear-gradient(160deg, rgba(28,58,122,0.05), rgba(163,24,47,0.04));
  border-radius: 10px;
  padding: 2.6rem 2.2rem;
  border-bottom: none;
  margin: 1rem 0;
}
.chapter-section.is-interlude .chapter-heading {
  font-style: italic;
}
.chapter-section.is-interlude p {
  font-style: italic;
  color: var(--ink-soft);
}
.chapter-section.is-interlude > .chapter-body > p:first-of-type::first-letter {
  color: var(--blue);
}

/* Epilogue */
.chapter-section.is-epilogue {
  text-align: center;
  padding-top: 4rem;
}
.chapter-section.is-epilogue .chapter-heading {
  margin: 0 auto 1.8rem;
}
.chapter-section.is-epilogue .chapter-heading::after {
  left: 50%;
  transform: translateX(-50%);
}
.chapter-section.is-epilogue p {
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Chapter footer nav */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  font-size: 0.9rem;
}
.chapter-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}
.chapter-nav a:hover {
  color: var(--red);
  border-color: var(--red);
}

/* Footer */
.reader-footer {
  text-align: center;
  padding: 3rem 1.6rem 5rem;
  color: var(--ink-soft);
}
.reader-footer a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(169,127,47,0.4);
  font-family: var(--font-serif-en);
  letter-spacing: 0.08em;
}
.reader-footer a:hover { color: var(--red); }

@media (max-width: 640px) {
  #novel-root { padding: 2.6rem 1.2rem 6rem; }
  .chapter-section.is-interlude { padding: 1.8rem 1.4rem; }
}