/* ============================================================
   人和他的撒旦  ·  Oliver
   ============================================================ */

:root {
  --bg: #0e0d0b;
  --ink: #e8e1d0;
  --ink-soft: #b8b0a1;
  --ink-faint: #7a7468;
  --ink-rule: #2d2a25;
  --accent: #a8443d;
  --accent-soft: #8a3530;
  --measure: 36rem;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", "PingFang SC", Georgia, serif;
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --font-latin: "EB Garamond", "Garamond", "Adobe Caslon Pro", "Times New Roman", Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-serif);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-size: 17px;
  line-height: 1.95;
  letter-spacing: 0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.4s ease;
}
a:hover { color: var(--accent); }

::selection { background: var(--accent); color: var(--bg); }


/* HOME — text left, cover right */
.home-page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 3rem 2rem;
  animation: fadeIn 1.6s ease-out both;
}

.home-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 5rem;
  align-items: center;
  max-width: 900px;
  width: 100%;
}

.home-text { text-align: left; }

.home-cover {
  display: flex;
  align-items: center;
  justify-content: center;
}

.cover {
  width: 280px;
  max-width: 280px;
  aspect-ratio: 3 / 4;
  background: #1a1814;
  border: 1px solid var(--ink-rule);
  display: block;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px -20px rgba(0, 0, 0, 0.8);
  flex-shrink: 0;
}

.cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.cover-placeholder {
  text-align: center;
  color: var(--ink-soft);
  letter-spacing: 0.4em;
  font-size: 0.85rem;
  writing-mode: vertical-rl;
  height: 70%;
  display: flex;
  align-items: center;
}

.cover-placeholder .ph-title {
  font-size: 1.1rem;
  color: var(--ink);
  letter-spacing: 0.6em;
}

.title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 2.6rem);
  font-weight: 400;
  margin: 0 0 0.6rem 0;
  letter-spacing: 0.25em;
  padding-left: 0.25em;
  line-height: 1.4;
  color: var(--ink);
}

.subtitle {
  font-family: var(--font-latin);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 1.4rem;
}

.byline {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  color: var(--ink-soft);
  margin-bottom: 2.8rem;
}

.epigraph {
  margin: 0 0 2.8rem 0;
  padding: 0 0 0 1.4rem;
  border-left: 1px solid var(--ink-rule);
  font-size: 0.88rem;
  line-height: 2;
  color: var(--ink-soft);
  font-style: italic;
  letter-spacing: 0.04em;
  max-width: 22rem;
}

.epigraph .line { display: block; }

.epigraph .attr {
  display: block;
  margin-top: 1.2rem;
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
}

.toc {
  list-style: none;
  padding: 0;
  margin: 0 0 2.5rem 0;
  display: flex;
  flex-direction: row;
  gap: 0;
}

.toc li { display: block; flex: 0 0 auto; }

.toc a {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem 0.6rem 0;
  margin-right: 0.6rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.toc .ch-num {
  font-family: var(--font-latin);
  font-style: italic;
  letter-spacing: 0.1em;
  font-size: 1.05rem;
}

.toc .ch-arrow {
  color: var(--ink-faint);
  font-size: 0.8rem;
  transition: transform 0.4s ease, color 0.4s ease, opacity 0.4s ease;
  opacity: 0;
}

.toc a:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
}

.toc a:hover .ch-arrow {
  opacity: 1;
  color: var(--accent);
  transform: translateX(4px);
}

.home-foot {
  margin-top: 1rem;
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--ink-faint);
}


/* READER */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 1px;
  background: var(--accent);
  width: 0;
  z-index: 100;
  transition: width 0.1s linear;
}

.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 2rem;
  background: linear-gradient(to bottom, var(--bg) 60%, transparent);
  z-index: 50;
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--ink-faint);
}

.topnav .home { color: var(--ink-faint); }
.topnav .home:hover { color: var(--accent); }

.topnav .chap-mark {
  font-family: var(--font-latin);
  font-style: italic;
  letter-spacing: 0.15em;
  font-size: 0.9rem;
}

.chapter {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 8rem 1.6rem 6rem;
  animation: fadeIn 1.4s ease-out both;
}

.chapter-head {
  text-align: center;
  margin-bottom: 4rem;
}

.chap-num {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 1.6rem;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  padding-left: 0.2em;
}

/* Prose — all paragraphs indent 2 chars, uniform rhythm.
   Section breaks <hr class="break"> add extra breathing space. */
.prose p {
  margin: 0 0 1.0em 0;
  text-align: justify;
  text-justify: inter-ideograph;
  hyphens: auto;
  text-indent: 2em;
}

.prose hr.break {
  border: none;
  height: auto;
  background: transparent;
  margin: 2.6em 0;
  overflow: visible;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.85rem;
  letter-spacing: 0.6em;
  padding-left: 0.6em;
}

.prose hr.break::before {
  content: "·    ·    ·";
}

.prose em {
  font-style: italic;
  color: var(--ink);
}

.prose em.cite {
  color: var(--ink);
  font-style: italic;
}

.prose .poem {
  margin: 3em auto;
  padding: 0;
  border: none;
  text-align: center;
  font-style: italic;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  line-height: 2.4;
  font-size: 0.98em;
  position: relative;
}

.prose .poem::before,
.prose .poem::after {
  content: "";
  display: block;
  width: 1.5rem;
  height: 1px;
  background: var(--ink-rule);
  margin: 0 auto 1.5rem;
}

.prose .poem::after { margin: 1.5rem auto 0; }

.prose .poem .poem-line {
  display: block;
  text-indent: 0;
}

.chapter-foot {
  margin-top: 7rem;
  padding-top: 3rem;
  border-top: 1px solid var(--ink-rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.chapter-foot .prev,
.chapter-foot .next,
.chapter-foot .toc { flex: 1; }

.chapter-foot .prev { text-align: left; }
.chapter-foot .toc {
  text-align: center;
  color: var(--ink-faint);
  font-family: var(--font-serif);
  font-style: normal;
  letter-spacing: 0.3em;
  font-size: 0.78rem;
}
.chapter-foot .next { text-align: right; }
.chapter-foot .prev.disabled { visibility: hidden; }

.chapter-foot .next.end {
  color: var(--accent);
  font-family: var(--font-serif);
  font-style: normal;
  letter-spacing: 0.3em;
}


/* END PAGE */
.end-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 4rem 1.5rem;
  text-align: center;
  animation: fadeIn 2s ease-out both;
}

.end-mark {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.6em;
  padding-left: 0.6em;
  color: var(--accent);
  margin-bottom: 4.5rem;
}

.end-rule {
  width: 1px;
  height: 5rem;
  background: var(--ink-rule);
  margin: 0 auto 3.5rem;
}

.end-meta {
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--ink-soft);
  line-height: 2.6;
  padding-left: 0.4em;
}

.end-meta .en {
  font-family: var(--font-latin);
  font-style: italic;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.end-meta .author {
  font-family: var(--font-latin);
  font-style: italic;
  letter-spacing: 0.15em;
  font-size: 0.95rem;
  color: var(--ink);
  margin-top: 0.6rem;
}

.end-meta .year {
  font-family: var(--font-latin);
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  font-size: 0.78rem;
  margin-top: 0.4rem;
}

.end-back {
  margin-top: 5rem;
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--ink-faint);
  padding-left: 0.4em;
}


/* MOTION */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}


/* MOBILE — stack cover above text */
@media (max-width: 820px) {
  .home-frame {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  .home-text { text-align: center; }
  .home-cover { order: -1; }
  .epigraph {
    margin: 0 auto 2.8rem;
    border-left: none;
    padding: 0;
    text-align: center;
  }
  .toc { justify-content: center; }
}

@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.9; }
  .chapter { padding: 6.5rem 1.3rem 4rem; }
  .topnav { padding: 1rem 1.3rem; font-size: 0.65rem; }
  .title { font-size: 1.8rem; letter-spacing: 0.22em; }
  .subtitle { font-size: 0.85rem; }
  .epigraph { font-size: 0.85rem; }
  .cover { width: 220px; }
  .end-mark { font-size: 1.5rem; }
  .chap-num { font-size: 1.3rem; }
}