/* ============================================
   Story Content Pages — Celestial Design System
   ============================================ */

:root {
  --sky-pearl: oklch(0.97 0.01 270);
  --jade-mist: oklch(0.93 0.04 165);
  --cloud-white: oklch(0.98 0.005 270);
  --cinnabar-glow: oklch(0.65 0.18 35);
  --gold-brightness: oklch(0.82 0.14 85);
  --lotus-pink: oklch(0.78 0.10 350);
  --heaven-blue: oklch(0.72 0.10 240);
  --immortal-teal: oklch(0.70 0.10 185);
  --purple-dusk: oklch(0.55 0.12 295);
  --ink-dark: oklch(0.25 0.02 270);
  --ink-medium: oklch(0.45 0.02 270);
  --ink-light: oklch(0.60 0.02 270);

  --font-display: 'Cinzel Decorative', 'Noto Serif SC', serif;
  --font-heading: 'Cinzel', 'Noto Serif SC', serif;
  --font-body: 'Cormorant Garamond', 'Noto Serif SC', serif;
  --font-caption: 'EB Garamond', 'Noto Serif SC', serif;
  --font-chinese: 'Noto Serif SC', serif;

  --fs-hero: clamp(2.4rem, 5vw + 1rem, 4.5rem);
  --fs-h1: clamp(2rem, 3vw + 0.5rem, 3rem);
  --fs-h2: clamp(1.4rem, 2vw + 0.3rem, 2rem);
  --fs-h3: clamp(1.1rem, 1.5vw + 0.2rem, 1.4rem);
  --fs-body: clamp(1.05rem, 0.8vw + 0.7rem, 1.2rem);
  --fs-small: clamp(0.85rem, 0.6vw + 0.6rem, 0.95rem);

  --sp-xs: clamp(0.4rem, 0.5vw, 0.6rem);
  --sp-sm: clamp(0.8rem, 1vw, 1.2rem);
  --sp-md: clamp(1.2rem, 2vw, 2rem);
  --sp-lg: clamp(2rem, 3vw, 3.5rem);
  --sp-xl: clamp(3rem, 5vw, 6rem);
  --sp-2xl: clamp(4rem, 7vw, 9rem);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 100px;

  --shadow-whisper: 0 2px 8px oklch(0.3 0.03 270 / 0.06);
  --shadow-glow: 0 4px 20px oklch(0.3 0.03 270 / 0.08);
  --shadow-celestial: 0 8px 40px oklch(0.3 0.04 270 / 0.10);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s var(--ease-out-expo);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-rendering: optimizeLegibility; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink-dark);
  background: var(--sky-pearl);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, oklch(0.95 0.04 200 / 0.25), transparent),
    radial-gradient(ellipse 60% 80% at 80% 90%, oklch(0.94 0.04 340 / 0.15), transparent);
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3 { font-family: var(--font-heading); font-weight: 400; line-height: 1.3; letter-spacing: 0.02em; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

::selection { background: oklch(0.78 0.10 350 / 0.25); color: var(--ink-dark); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--sky-pearl); }
::-webkit-scrollbar-thumb { background: oklch(0.80 0.04 295); border-radius: 4px; }

.container { width: min(1280px, 92%); margin-inline: auto; }
.container-narrow { width: min(860px, 92%); margin-inline: auto; }

/* ===== NAVIGATION ===== */
.nav-bar { 
  position: sticky; top: 0; z-index: 100; 
  backdrop-filter: blur(20px) saturate(1.2); 
  -webkit-backdrop-filter: blur(20px) saturate(1.2); 
  background: oklch(0.97 0.01 270 / 0.75); 
  border-bottom: 1px solid oklch(0.90 0.02 270 / 0.3); 
  padding: var(--sp-sm) 0; 
  box-shadow: var(--shadow-whisper); 
}

.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-md); }

.nav-logo {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  letter-spacing: 0.08em;
  color: var(--purple-dusk);
  white-space: nowrap;
  transition: color var(--transition-smooth);
}
.nav-logo:hover { color: var(--cinnabar-glow); }
.nav-logo .cn { font-family: var(--font-chinese); font-size: 0.85em; opacity: 0.6; margin-left: 0.5em; }

.nav-links { display: flex; gap: var(--sp-md); flex-wrap: wrap; justify-content: flex-end; align-items: center; }

.nav-links a {
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-medium);
  transition: color var(--transition-smooth);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--cinnabar-glow);
  transition: width var(--transition-smooth);
}

.nav-links a:hover { color: var(--cinnabar-glow); }
.nav-links a:hover::after { width: 100%; }

.lang-switch {
  display: flex;
  background: oklch(0.95 0.01 270);
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid oklch(0.90 0.02 270 / 0.5);
}

.lang-btn {
  padding: 0.35em 0.9em;
  border: none; background: transparent;
  color: var(--ink-light);
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all var(--transition-smooth);
}

.lang-btn.active {
  background: var(--cinnabar-glow);
  color: var(--cloud-white);
  font-weight: 600;
}

.mobile-toggle {
  display: none;
  background: none; border: none;
  color: var(--purple-dusk);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== STORY HERO ===== */
.story-hero {
  text-align: center;
  padding-top: 0;
}

.story-hero-img {
  width: 100%;
  max-height: 420px;
  overflow: hidden;
  position: relative;
}

.story-hero-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, var(--sky-pearl) 100%);
}

.story-hero-img img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.story-hero-content {
  position: relative;
  margin-top: -4rem;
  padding-bottom: var(--sp-lg);
  z-index: 2;
}

.breadcrumb {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cinnabar-glow);
  margin-bottom: var(--sp-md);
  display: inline-block;
  transition: color var(--transition-smooth);
}
.breadcrumb:hover { color: var(--ink-dark); }

.story-chinese {
  font-family: var(--font-chinese);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: var(--purple-dusk);
  opacity: 0.45;
  letter-spacing: 0.25em;
  margin-bottom: var(--sp-xs);
}

.story-hero-content h1 {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  background: linear-gradient(135deg, var(--ink-dark) 30%, var(--purple-dusk) 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--sp-sm);
}

.story-subtitle {
  font-family: var(--font-caption);
  font-style: italic;
  color: var(--ink-light);
  max-width: 600px;
  margin-inline: auto;
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  margin-bottom: var(--sp-md);
}

.story-meta {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-light);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8em;
}

.meta-tag {
  display: inline-block;
  padding: 0.2em 0.8em;
  border-radius: var(--radius-pill);
  border: 1px solid oklch(0.85 0.04 270);
  color: var(--ink-medium);
  background: oklch(0.96 0.01 270);
}

.meta-dot { opacity: 0.4; }

/* ===== STORY BODY ===== */
.story-body {
  padding-top: var(--sp-xl);
  padding-bottom: var(--sp-xl);
}

.story-section {
  margin-bottom: var(--sp-xl);
}

.story-section h2 {
  font-family: var(--font-heading);
  color: var(--ink-dark);
  margin-bottom: var(--sp-md);
  padding-bottom: var(--sp-xs);
  border-bottom: 1px solid oklch(0.90 0.02 270 / 0.4);
}

.story-section h2 .cn-inline {
  font-family: var(--font-chinese);
  font-size: 0.65em;
  color: var(--ink-light);
  margin-left: 0.5em;
  opacity: 0.6;
}

.story-section p {
  margin-bottom: var(--sp-md);
  color: var(--ink-medium);
}

.story-section p em {
  font-family: var(--font-caption);
  color: var(--ink-dark);
}

/* ===== TWO COLUMN ===== */
.two-col {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--sp-lg);
  align-items: start;
}

.col-text p:last-child { margin-bottom: 0; }

.fact-card {
  background: var(--cloud-white);
  border: 1px solid oklch(0.92 0.015 270 / 0.5);
  border-radius: var(--radius-md);
  padding: var(--sp-md);
  box-shadow: var(--shadow-whisper);
}

.fact-card h4 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cinnabar-glow);
  margin-bottom: var(--sp-sm);
}

.fact-card li {
  font-size: var(--fs-small);
  color: var(--ink-medium);
  padding: 0.3em 0;
  border-bottom: 1px solid oklch(0.93 0.01 270 / 0.4);
}

.fact-card li:last-child { border-bottom: none; }
.fact-card li em { font-family: var(--font-caption); }

/* ===== QUOTE ===== */
.story-quote {
  background: var(--cloud-white);
  border-left: 3px solid var(--purple-dusk);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--sp-md) var(--sp-lg);
  margin: var(--sp-lg) 0;
  box-shadow: var(--shadow-whisper);
}

.story-quote p {
  font-family: var(--font-caption);
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
  font-style: italic;
  color: var(--ink-dark);
  line-height: 1.9;
  margin-bottom: var(--sp-xs) !important;
}

.story-quote cite {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-light);
  text-transform: uppercase;
}

.story-quote cite em { font-family: var(--font-caption); }

/* ===== HIGHLIGHT BOX ===== */
.highlight-box {
  display: flex;
  gap: var(--sp-md);
  background: linear-gradient(135deg, oklch(0.95 0.03 295 / 0.3), oklch(0.96 0.02 270 / 0.2));
  border: 1px solid oklch(0.90 0.03 295 / 0.3);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  margin: var(--sp-lg) 0;
}

.highlight-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
  opacity: 0.6;
}

.highlight-box h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--ink-dark);
  margin-bottom: var(--sp-xs);
}

.highlight-box p {
  font-size: var(--fs-small);
  color: var(--ink-medium);
  margin-bottom: 0 !important;
}

/* ===== STORY NAVIGATION ===== */
.story-nav {
  border-top: 1px solid oklch(0.92 0.01 270);
  padding: var(--sp-lg) 0;
  margin-top: var(--sp-xl);
}

.story-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
}

.story-nav-prev, .story-nav-next {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  transition: color var(--transition-smooth);
}

.story-nav-prev:hover, .story-nav-next:hover { color: var(--cinnabar-glow); }

.nav-arrow {
  font-size: 1.4rem;
  color: var(--purple-dusk);
  opacity: 0.5;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.story-nav-prev:hover .nav-arrow { opacity: 1; transform: translateX(-4px); }
.story-nav-next:hover .nav-arrow { opacity: 1; transform: translateX(4px); }

.nav-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-light);
  display: block;
}

.nav-title {
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  color: var(--ink-dark);
  display: block;
}

.nav-all {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cinnabar-glow);
  padding: 0.5em 1.5em;
  border-radius: var(--radius-pill);
  border: 1px solid var(--cinnabar-glow);
  transition: all var(--transition-smooth);
}

.nav-all:hover {
  background: var(--cinnabar-glow);
  color: var(--cloud-white);
}

/* ===== FOOTER ===== */
.site-footer {
  text-align: center;
  padding: var(--sp-xl) 0 var(--sp-lg);
  border-top: 1px solid oklch(0.92 0.01 270);
}

.site-footer p {
  font-family: var(--font-caption);
  font-size: var(--fs-small);
  color: var(--ink-light);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--purple-dusk);
  opacity: 0.6;
  margin-bottom: var(--sp-sm);
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: oklch(0.97 0.01 270 / 0.98);
    backdrop-filter: blur(16px);
    padding: var(--sp-md);
    border-bottom: 1px solid oklch(0.90 0.02 270 / 0.5);
  }
  .nav-links.open { display: flex; }
  .mobile-toggle { display: block; }
  .two-col { grid-template-columns: 1fr; }
  .story-hero-img { max-height: 280px; }
  .story-hero-img img { height: 280px; }
  .story-hero-content { margin-top: -2rem; }
  .story-nav-inner { flex-direction: column; gap: var(--sp-md); }
  .story-nav-prev, .story-nav-next { width: 100%; justify-content: center; }
  .highlight-box { flex-direction: column; }
}