:root {
  --bg: #050810;
  --bg-soft: #0d1320;
  --panel: rgba(22, 32, 56, 0.55);
  --panel-edge: rgba(120, 170, 255, 0.18);
  --text: #e8e0d8;
  --text-dim: #9aa6b8;
  --accent: #4a90d9;        /* Mars-blue dawn */
  --accent-warm: #c8b18b;   /* dust gold */
  --accent-soft: #6da7e4;
  --rule: rgba(120, 170, 255, 0.25);
  --link: #6da7e4;
  --link-hover: #c8b18b;
  --serif: 'Cormorant Garamond', 'Newsreader', Georgia, serif;
  --display: 'Cinzel', 'Cormorant Garamond', serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  font-size: 18px;
  overflow-x: hidden;
  position: relative;
}

/* starfield background */
.starfield {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(74, 144, 217, 0.07), transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(193, 68, 14, 0.04), transparent 60%),
    linear-gradient(180deg, #050810 0%, #08101e 50%, #050810 100%);
  z-index: -2;
  pointer-events: none;
}
.starfield::before, .starfield::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 23% 17%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 67% 38%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 14% 73%, #c8b18b 50%, transparent 51%),
    radial-gradient(2px 2px at 89% 12%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 52% 87%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 8% 41%, #ffffff 50%, transparent 51%),
    radial-gradient(2px 2px at 41% 23%, #c8b18b 50%, transparent 51%),
    radial-gradient(1px 1px at 76% 67%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 31% 53%, #ffffff 50%, transparent 51%);
  background-size: 100vw 100vh;
  animation: starshift 240s linear infinite;
  opacity: 0.5;
}
.starfield::after {
  background-image:
    radial-gradient(1px 1px at 11% 84%, #4a90d9 50%, transparent 51%),
    radial-gradient(1px 1px at 64% 12%, #ffffff 50%, transparent 51%),
    radial-gradient(2px 2px at 38% 47%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 92% 78%, #ffffff 50%, transparent 51%),
    radial-gradient(1px 1px at 25% 31%, #c8b18b 50%, transparent 51%),
    radial-gradient(1px 1px at 81% 56%, #ffffff 50%, transparent 51%);
  animation-direction: reverse;
  animation-duration: 360s;
  opacity: 0.35;
}
@keyframes starshift {
  to { background-position: -300vw 100vh; }
}

/* topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.topbar .brand {
  font-family: var(--display);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
}
.topbar-tools { display: flex; align-items: center; gap: 20px; }
.topbar .home {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.topbar .home:hover { color: var(--accent); }

/* progress bar */
.progress {
  position: fixed;
  top: 65px;
  left: 0; right: 0;
  height: 2px;
  background: transparent;
  z-index: 49;
}
.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-warm) 100%);
  transition: width 0.1s linear;
}

/* hero */
.hero {
  max-width: 880px;
  margin: 0 auto;
  padding: 80px 24px 40px;
  text-align: center;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.1;
  margin-bottom: 24px;
}
.hero h1 .accent {
  color: var(--accent);
  font-style: italic;
}
.hero .tagline {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-dim);
  font-style: italic;
  max-width: 720px;
  margin: 0 auto 18px;
  line-height: 1.5;
}
.hero .meta {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* synopsis */
.intro-block {
  max-width: 820px;
  margin: 32px auto 60px;
  padding: 0 24px;
}
.intro-block p {
  font-size: 1.08rem;
  margin-bottom: 18px;
  color: var(--text);
}
.intro-block em { color: var(--accent-warm); font-style: italic; }

/* part divider */
.part-divider {
  max-width: 1100px;
  margin: 56px auto 28px;
  padding: 0 24px;
  display: flex;
  align-items: baseline;
  gap: 18px;
  font-family: var(--display);
}
.part-divider .part-num {
  color: var(--accent);
  letter-spacing: 0.16em;
  font-size: 0.85rem;
}
.part-divider span:last-child {
  color: var(--text-dim);
  font-size: 1.6rem;
  font-style: italic;
  letter-spacing: 0.04em;
}
.part-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* chapter grid */
.chapter-graph { padding-bottom: 80px; }
.chapter-list {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.chapter-node {
  display: flex;
  gap: 16px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}
.chapter-node:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: rgba(28, 42, 70, 0.65);
}
.chapter-node .cover {
  flex-shrink: 0;
  width: 78px; height: 78px;
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(135deg, #1a253d 0%, #0a1020 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-family: var(--display);
  font-size: 1.4rem;
}
.chapter-node .cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.chapter-node .body { flex: 1; min-width: 0; }
.chapter-node .num {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 4px;
}
.chapter-node .title {
  font-family: var(--display);
  font-size: 1.1rem;
  margin-bottom: 4px;
  color: var(--text);
}
.chapter-node .subtitle {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.35;
}

/* chapter page */
.chapter-page {
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.chapter-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.chapter-page h1 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  line-height: 1.15;
}
.chapter-cover-block {
  margin: 0 auto 28px;
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(135deg, #1a253d, #0a1020);
  aspect-ratio: 1 / 1;
  max-width: 280px;
}
.chapter-cover-block img {
  width: 100%; height: 100%;
  display: block;
  object-fit: cover;
}
.chapter-body p {
  margin-bottom: 0.85em;
  color: var(--text);
}
.chapter-body em { font-style: italic; color: var(--accent-warm); }
.chapter-body strong { color: var(--accent); font-weight: 500; }
.chapter-body hr.scene-break {
  border: none;
  margin: 1.8em auto;
  width: 60px;
  height: 0;
  position: relative;
}
.chapter-body hr.scene-break::after {
  content: "* * *";
  position: absolute;
  top: -0.55em;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-dim);
  font-size: 0.95rem;
  letter-spacing: 0.3em;
}
.chapter-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 6px 18px;
  margin: 1.2em 0;
  font-style: italic;
  color: var(--text-dim);
}

/* navigation between chapters */
.chapter-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}
.chapter-nav a, .chapter-nav span {
  font-family: var(--mono);
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--text-dim);
  padding: 8px 0;
}
.chapter-nav a.prev::before { content: "← "; color: var(--accent); }
.chapter-nav a.next { text-align: right; }
.chapter-nav a.next::after { content: " →"; color: var(--accent); }
.chapter-nav a:hover { color: var(--accent); }

/* responsive */
@media (max-width: 640px) {
  body { font-size: 17px; }
  .hero { padding: 50px 20px 24px; }
  .topbar { padding: 12px 16px; }
  .chapter-list { grid-template-columns: 1fr; }
}