/* ===== Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:wght@700&family=JetBrains+Mono:wght@400&family=Noto+Sans+TC:wght@400;500&family=Noto+Serif+TC:wght@400;700;900&family=Space+Grotesk:wght@500&display=swap');

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; text-size-adjust: 100%; }
body { line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===== Tokens ===== */
:root {
  /* Palette */
  --paper: #f5f1ea;
  --paper-muted: #ebe6dc;
  --ink: #1a1612;
  --ink-muted: #3d362d;
  --void: #0a0907;
  --void-muted: #1c1713;
  --gold: #c5a059;
  --gold-ink: #8a6420;
  --gold-dark: #b59049;
  --sepia: #2d251a;
  --sepia-muted: #8b8275;
  --on-void: #f5f1ea;
  --on-void-muted: rgba(245, 241, 234, 0.68);

  /* Typography */
  --font-display-latin: 'Fraunces', Georgia, serif;
  --font-display-cjk: 'Noto Serif TC', 'Songti TC', serif;
  --font-body-latin: 'Space Grotesk', system-ui, sans-serif;
  --font-body-cjk: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Space Mono', ui-monospace, monospace;

  --fs-display-xl: clamp(4.5rem, 13.5vw, 16rem);
  --fs-display-l: clamp(3.4rem, 7.5vw, 7rem);
  --fs-display-m: clamp(2.2rem, 4.5vw, 3.5rem);
  --fs-body-l: 1.22rem;
  --fs-body-m: 1rem;
  --fs-body-s: 0.875rem;
  --fs-label: 0.72rem;

  /* Spacing */
  --space-side: clamp(1.25rem, 5vw, 4rem);
  --space-block: clamp(2rem, 8vh, 6rem);

  /* UI */
  --hud-gap: 15px;
  --nav-w: 60px;

  /* Theming tokens (overridden by .theme-dark / body.is-dark-ui) */
  --bg: var(--paper);
  --fg: var(--ink);
  --fg-muted: var(--sepia);
  --accent: var(--gold);
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body-cjk), var(--font-body-latin);
  font-size: var(--fs-body-m);
  transition: background-color 0.6s ease, color 0.6s ease;
}

body.is-dark-ui {
  --bg: var(--void);
  --fg: var(--on-void);
  --fg-muted: var(--on-void-muted);
  --accent: var(--gold);
}

/* ===== Grain overlay ===== */
.grain {
  position: fixed; inset: -50% -50%; z-index: 9990; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.04; mix-blend-mode: multiply; animation: grain 0.5s steps(6) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0); }
  25% { transform: translate(-3%, 2%); }
  50% { transform: translate(2%, -3%); }
  75% { transform: translate(-2%, -2%); }
}

/* ===== Loader ===== */
#loader {
  position: fixed; inset: 0; z-index: 10000;
  background: var(--void); color: var(--on-void);
  display: grid; place-items: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
#loader.is-hidden { opacity: 0; visibility: hidden; }
.loader-inner { width: min(320px, 80vw); text-align: center; }
.loader-brand {
  font-family: var(--font-mono);
  font-size: 0.85rem; letter-spacing: 0.35rem;
  margin-bottom: 20px; opacity: 0.8;
}
.loader-brand span { color: var(--gold); margin: 0 10px; }
.loader-bar-wrap {
  height: 1px; background: rgba(245,241,234,0.12);
  overflow: hidden; margin-bottom: 14px;
}
#loader-bar {
  height: 100%; width: 0%; background: var(--gold);
  transition: width 0.25s ease-out;
}
.loader-status {
  font-family: var(--font-mono);
  font-size: 0.65rem; letter-spacing: 0.25rem; opacity: 0.55;
}

/* ===== Site Header ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px clamp(1.25rem, 4vw, 2.5rem);
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 0.25rem; color: var(--fg);
  text-transform: uppercase;
}
.logo-mark {
  display: grid; place-items: center;
  width: 28px; height: 28px; border: 1px solid var(--accent);
  font-family: var(--font-display-latin); font-weight: 700;
  font-size: 0.95rem; color: var(--accent); letter-spacing: 0;
}
.logo-divider { color: var(--accent); }
.logo-sub {
  font-family: var(--font-body-cjk); font-weight: 400;
  opacity: 0.6; letter-spacing: 0.08rem;
}
.header-nav {
  display: flex; gap: 18px;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.25rem;
}
.header-nav a { opacity: 0.6; transition: opacity 0.3s; }
.header-nav a:hover { opacity: 1; color: var(--accent); }

/* ===== V-Nav ===== */
.v-nav {
  position: fixed; left: clamp(1rem, 2.5vw, 2rem); top: 50%;
  transform: translateY(-50%); z-index: 150;
  display: flex; flex-direction: column; gap: 32px;
  pointer-events: auto;
}
.v-nav-item {
  writing-mode: vertical-rl; text-orientation: upright;
  font-family: var(--font-display-cjk);
  font-size: 0.8rem; letter-spacing: 0.3rem;
  color: var(--fg); opacity: 0.3;
  transition: opacity 0.4s, color 0.4s;
  padding: 4px; background: transparent; border: 0; cursor: pointer;
}
.v-nav-item.is-active { opacity: 1; color: var(--accent); font-weight: 700; }
.v-nav-item:hover { opacity: 0.85; }

/* ===== Hero ===== */
.hero {
  position: relative; z-index: 50;
  height: 100vh; min-height: 600px;
  display: grid; place-items: center;
  padding: 0 var(--space-side);
  background: var(--paper);
}
.hero-inner { text-align: center; max-width: 1200px; }
.hero-pre {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1vw, 1.15rem); letter-spacing: 0.5rem;
  color: var(--gold-ink); margin-bottom: 32px;
}
.hero-title {
  font-family: var(--font-display-cjk);
  font-size: var(--fs-display-xl); font-weight: 900;
  line-height: 0.95; letter-spacing: 0.05em;
  color: var(--ink); margin-bottom: 36px;
  display: flex; justify-content: center; align-items: baseline;
  gap: 0.1em; flex-wrap: wrap;
}
.hero-title .hero-dot {
  font-style: normal; color: var(--gold); font-size: 0.6em;
  transform: translateY(-0.1em);
}
.hero-sub {
  font-family: var(--font-display-cjk);
  font-size: clamp(1.4rem, 2.6vw, 2.2rem); font-weight: 400;
  letter-spacing: 0.75em; color: var(--ink-muted);
  padding-left: 0.75em;
}
.hero-scroll {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  font-family: var(--font-mono); font-size: clamp(0.8rem, 0.9vw, 1rem);
  letter-spacing: 0.3rem; color: var(--ink-muted); opacity: 0.75;
}
.mouse {
  width: 20px; height: 32px; border: 1px solid currentColor;
  border-radius: 12px; position: relative;
}
.mouse::after {
  content: ''; position: absolute; top: 6px; left: 50%;
  width: 2px; height: 5px; background: currentColor;
  border-radius: 1px;
  animation: scroll-hint 2s infinite;
}
@keyframes scroll-hint {
  0% { opacity: 0; transform: translate(-50%, 0); }
  50% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 12px); }
}

/* ===== Canvas background ===== */
.canvas-wrap {
  position: fixed; inset: 0; z-index: 10;
  background: var(--paper);
  clip-path: circle(0% at 50% 50%);
  will-change: clip-path;
}
#canvas { width: 100%; height: 100%; }

/* ===== HUD labels ===== */
.hud {
  position: fixed; z-index: 40;
  display: flex; align-items: center; gap: var(--hud-gap);
  opacity: 0; transform: translateY(12px);
  transition: opacity 0.6s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
}
.hud.is-active { opacity: 1; transform: translateY(0); }
.hud-1 { top: 30%; right: 10%; flex-direction: row-reverse; }
.hud-2 { top: 66%; left: 10%; }
.hud-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gold); box-shadow: 0 0 14px rgba(197,160,89,0.7);
  position: relative;
}
.hud-dot::after {
  content: ''; position: absolute; inset: -5px;
  border: 1px solid var(--gold); border-radius: 50%;
  animation: hud-pulse 2s infinite;
}
@keyframes hud-pulse {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.6); opacity: 0; }
}
.hud-box {
  padding: 10px 16px 12px;
  background: var(--paper);
  border-left: 3px solid var(--gold);
  box-shadow: 0 12px 36px rgba(26,22,18,0.18);
  white-space: nowrap; color: var(--ink);
}
.is-dark-ui .hud-box {
  background: var(--void);
  color: var(--on-void);
  box-shadow: 0 12px 36px rgba(0,0,0,0.6);
}
.hud-tag {
  display: block; font-family: var(--font-mono);
  font-size: 0.6rem; letter-spacing: 0.25rem;
  color: var(--gold); font-weight: 700; margin-bottom: 4px;
}
.hud-box p { font-size: 0.95rem; font-weight: 700; letter-spacing: 0.05rem; }

/* ===== Dark overlay ===== */
#dark-overlay {
  position: fixed; inset: 0; z-index: 20;
  background: var(--void); opacity: 0; pointer-events: none;
  will-change: opacity;
}

/* ===== Marquee ===== */
.marquee {
  position: fixed; left: 0; right: 0; bottom: 8%;
  z-index: 30; pointer-events: none;
  overflow: hidden; opacity: 0; transition: opacity 0.8s;
}
.marquee.is-active { opacity: 1; }
.marquee-track {
  display: flex; gap: 0;
  font-family: var(--font-display-cjk);
  font-size: 12vw; font-weight: 900; line-height: 1;
  white-space: nowrap; will-change: transform;
  color: var(--on-void); opacity: 0.12;
}
.marquee-track span { padding-right: 40px; }

/* ===== Scroll container ===== */
#scroll-container {
  position: relative; z-index: 60;
  height: 1000vh;
  pointer-events: none;
}
.chapter {
  position: fixed; inset: 0;
  display: grid; place-items: center;
  padding: 0 var(--space-side);
  opacity: 0; pointer-events: none;
}
.chapter.is-live { pointer-events: auto; }
.chapter-inner {
  width: 100%;
  max-width: min(42vw, 540px);
}
.chapter.align-left .chapter-inner {
  margin-right: auto; margin-left: 6vw;
}
.chapter.align-right .chapter-inner {
  margin-left: auto; margin-right: 6vw;
}

/* ===== Chapter base typography ===== */
.chapter-tag {
  display: block; font-family: var(--font-mono);
  font-size: var(--fs-label); letter-spacing: 0.28rem;
  color: var(--gold-ink); margin-bottom: 24px;
}
.chapter-title {
  font-family: var(--font-display-cjk);
  font-size: var(--fs-display-l); font-weight: 700;
  line-height: 1.1; letter-spacing: 0.08em;
  color: var(--fg);
  margin-bottom: 28px;
}
.chapter-title em {
  font-style: normal; color: var(--accent);
}
.chapter-body {
  font-family: var(--font-body-cjk);
  font-size: var(--fs-body-l); line-height: 1.75;
  color: var(--fg-muted); max-width: 32em;
}

.chapter.theme-dark { color: var(--on-void); }
.chapter.theme-dark .chapter-title { color: var(--on-void); }
.chapter.theme-dark .chapter-body { color: var(--on-void-muted); }
.chapter.theme-dark .chapter-tag { color: var(--gold); }

/* Paper halo: boost legibility when text sits over aerial canvas (Act I/III) */
.chapter:not(.theme-dark) .chapter-tag,
.chapter:not(.theme-dark) .chapter-title,
.chapter:not(.theme-dark) .chapter-body {
  text-shadow:
    0 0 22px rgba(245, 241, 234, 0.85),
    0 0 8px rgba(245, 241, 234, 0.9),
    0 1px 2px rgba(245, 241, 234, 0.7);
}

/* ===== Act II · Stats (Chapter 04) ===== */
.chapter-04 .chapter-inner.stats {
  max-width: 1000px; width: min(92vw, 1000px);
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  margin: 0 auto;
}
.stat { text-align: left; }
.stat-label {
  display: block;
  font-family: var(--font-display-cjk), var(--font-mono);
  font-size: 0.85rem; letter-spacing: 0.18em;
  color: var(--gold); margin-bottom: 18px;
  font-weight: 500;
}
.stat-number {
  display: block;
  font-family: var(--font-display-latin);
  font-size: clamp(6rem, 15vw, 18rem);
  font-weight: 700; line-height: 0.82;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--on-void);
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}
.stat-desc {
  font-family: var(--font-display-cjk);
  font-size: clamp(1rem, 1.6vw, 1.4rem);
  color: var(--on-void); max-width: 14em;
  line-height: 1.5;
}

/* ===== Act II · Split (Chapter 05) ===== */
.chapter-05 .chapter-inner.split {
  max-width: 1400px; width: min(94vw, 1400px);
  display: grid; grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  margin: 0 auto;
}
.split-left { padding-right: 2vw; }
.split-right {
  aspect-ratio: 16 / 10; overflow: hidden;
  border: 1px solid rgba(245,241,234,0.08);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  border-radius: 2px;
}
.experiment-video {
  width: 100%; height: 100%; object-fit: cover;
}

/* ===== Act III · Editorial (Chapter 06) ===== */
.chapter-06 .chapter-inner.editorial {
  max-width: 1100px; width: min(92vw, 1100px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
  margin: 0 auto;
}
.editorial-head {
  grid-column: 1 / -1;
  margin-bottom: 32px;
}
.project-card {
  padding: 36px 0 36px;
  border-top: 1px solid var(--ink);
}
.project-loc {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.3rem;
  color: var(--sepia); margin-bottom: 20px;
}
.project-name {
  font-family: var(--font-display-cjk);
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 900; line-height: 1;
  margin-bottom: 22px; color: var(--ink);
}
.project-verse {
  font-family: var(--font-display-cjk);
  font-size: 1.1rem; line-height: 2;
  color: var(--ink-muted); letter-spacing: 0.05em;
}

/* ===== Act III · Finale CTA (Chapter 07) ===== */
.chapter-07 .chapter-inner.finale {
  max-width: 1200px; width: min(94vw, 1200px);
  display: grid;
  grid-template-rows: auto auto auto;
  gap: clamp(2rem, 4vw, 4rem);
  text-align: center; margin: 0 auto;
}
.chapter-07 .chapter-tag { text-align: center; }
.finale-title {
  font-size: clamp(4rem, 10vw, 10rem);
  font-weight: 900;
  margin: 0 auto;
}
.cta-triple {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 2rem);
  max-width: 1000px; margin: 0 auto;
}
.cta-card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 36px 24px;
  background: var(--paper-muted);
  border: 1px solid transparent;
  color: var(--ink); text-align: left;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1),
              border-color 0.4s, background 0.4s;
  cursor: pointer;
  will-change: transform;
}
.cta-card:hover {
  border-color: var(--gold);
  background: var(--paper);
  transform: translateY(-4px);
}
.cta-label {
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.3rem;
  color: var(--gold); text-transform: uppercase;
}
.cta-value {
  font-family: var(--font-display-cjk);
  font-size: clamp(1.4rem, 2vw, 1.9rem);
  font-weight: 700; letter-spacing: 0.05em;
  color: var(--ink); margin-top: 8px;
}
.cta-note {
  font-family: var(--font-body-cjk);
  font-size: 0.78rem; color: var(--sepia);
  margin-top: 4px;
}
.finale-meta {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.15rem;
  color: var(--sepia); margin-top: 20px;
}
.finale-meta p + p { margin-top: 10px; }
.finale-socials a { transition: color 0.3s; }
.finale-socials a:hover { color: var(--gold); }
.finale-socials span { margin: 0 12px; color: var(--gold); }

/* ===== Contact Modal ===== */
.contact-modal {
  margin: auto;
  border: none; padding: 0;
  background: var(--paper);
  color: var(--ink);
  max-width: 480px; width: 92vw;
  box-shadow: 0 40px 100px rgba(0,0,0,0.35);
}
.contact-modal::backdrop {
  background: rgba(10, 9, 7, 0.72);
  backdrop-filter: blur(6px);
}
.contact-modal form {
  padding: 40px 36px 32px;
  display: flex; flex-direction: column; gap: 16px;
  position: relative;
}
.modal-close {
  position: absolute; top: 12px; right: 14px;
  width: 36px; height: 36px; font-size: 24px;
  color: var(--sepia); cursor: pointer;
}
.modal-close:hover { color: var(--ink); }
.contact-modal h2 {
  font-family: var(--font-display-cjk);
  font-size: 1.8rem; font-weight: 900;
  margin-bottom: 4px;
}
.modal-sub {
  font-size: 0.85rem; color: var(--sepia);
  margin-bottom: 16px;
}
.contact-modal label {
  display: flex; flex-direction: column; gap: 6px;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.25rem; color: var(--sepia);
  text-transform: uppercase;
}
.contact-modal input,
.contact-modal select {
  padding: 12px 14px;
  border: 1px solid rgba(26,22,18,0.15);
  background: transparent;
  font-family: var(--font-body-cjk); font-size: 1rem;
  letter-spacing: 0.02em; color: var(--ink);
  transition: border-color 0.3s;
}
.contact-modal input:focus,
.contact-modal select:focus {
  outline: none; border-color: var(--gold);
}
.modal-submit {
  margin-top: 8px; padding: 14px 20px;
  background: var(--ink); color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.8rem; letter-spacing: 0.3rem;
  text-transform: uppercase; cursor: pointer;
  transition: background 0.3s;
}
.modal-submit:hover { background: var(--gold); color: var(--ink); }
.modal-hint { font-size: 0.75rem; color: var(--sepia); text-align: center; }

/* ===== Safe viewport on iOS Safari ===== */
.hero { min-height: 100svh; }
.chapter { min-height: 100svh; }

/* ===== Tablet & smaller (< 1024px) ===== */
@media (max-width: 1023px) {
  :root {
    --fs-display-xl: clamp(3rem, 11vw, 8rem);
    --fs-display-l: clamp(2.3rem, 6.5vw, 4.2rem);
  }

  .v-nav { display: none; }
  .site-header { padding: 18px 22px; }

  .chapter-inner {
    max-width: min(72vw, 640px);
  }
  .chapter.align-left .chapter-inner { margin-left: 5vw; }
  .chapter.align-right .chapter-inner { margin-right: 5vw; }

  /* Act II stats - keep 2 col but reduce gap */
  .chapter-04 .chapter-inner.stats { gap: clamp(1.5rem, 4vw, 3rem); }
  .stat-number { font-size: clamp(5rem, 13vw, 10rem); }

  /* Act II chapter 05 - stack vertically */
  .chapter-05 .chapter-inner.split {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: min(88vw, 720px);
  }
  .split-left { padding-right: 0; }
  .split-right { aspect-ratio: 16/9; }

  /* Act III chapter 06 - tighter gap */
  .chapter-06 .chapter-inner.editorial {
    gap: clamp(1.5rem, 3vw, 2.5rem);
    max-width: min(90vw, 1000px);
  }

  /* Act III chapter 07 CTA - 2+1 layout */
  .cta-triple {
    grid-template-columns: 1fr 1fr;
    gap: 0.9rem;
  }
  .cta-card.cta-form { grid-column: 1 / -1; }

  /* HUD positions tighter to edge */
  .hud-1 { right: 4%; top: 26%; }
  .hud-2 { left: 4%; top: 70%; }
  .hud-box { padding: 8px 14px 10px; }
  .hud-box p { font-size: 0.88rem; }
  .hud-tag { font-size: 0.55rem; letter-spacing: 0.18rem; }
}

/* ===== Mobile (< 768px) ===== */
@media (max-width: 767px) {
  :root {
    --fs-display-xl: clamp(4rem, 20vw, 7rem);
    --fs-display-l: clamp(2.2rem, 9.5vw, 3.6rem);
    --fs-body-l: 1rem;
  }

  .grain { display: none; }
  .site-header {
    padding: 12px 16px;
    backdrop-filter: blur(6px);
    background: rgba(245, 241, 234, 0.85);
  }
  .is-dark-ui .site-header { background: rgba(10, 9, 7, 0.82); }
  .logo-word, .logo-divider, .logo-sub { display: none; }
  .header-nav { gap: 14px; font-size: 0.62rem; letter-spacing: 0.22rem; }

  .hero { padding: 0 22px; }
  .hero-title { flex-direction: column; gap: 0; line-height: 1; }
  .hero-title .hero-dot {
    font-size: 0.4em;
    transform: rotate(90deg);
    margin: 0.08em 0;
  }
  .hero-pre { font-size: 0.95rem; letter-spacing: 0.38rem; margin-bottom: 26px; }
  .hero-sub { font-size: 1.2rem; letter-spacing: 0.45em; padding-left: 0.45em; }
  .hero-scroll { bottom: 26px; font-size: 0.8rem; letter-spacing: 0.28rem; }

  #scroll-container { height: 750vh; }

  /* Chapter frame: paper/void backdrop panel for legibility on aerial */
  .chapter { padding: 0 16px; }
  .chapter-inner {
    max-width: 100%;
    width: calc(100vw - 32px);
    margin: 0 auto !important;
    padding: 22px 20px;
    background: rgba(245, 241, 234, 0.92);
    backdrop-filter: blur(10px);
    border-left: 2px solid var(--gold-ink);
  }
  .chapter.theme-dark .chapter-inner {
    background: rgba(10, 9, 7, 0.88);
    border-left-color: var(--gold);
  }

  /* Remove text-shadow halo inside panel (redundant) */
  .chapter:not(.theme-dark) .chapter-tag,
  .chapter:not(.theme-dark) .chapter-title,
  .chapter:not(.theme-dark) .chapter-body { text-shadow: none; }

  .chapter-tag { margin-bottom: 16px; font-size: 0.62rem; letter-spacing: 0.22rem; }
  .chapter-title { margin-bottom: 18px; line-height: 1.18; }
  .chapter-body { line-height: 1.7; max-width: 100%; }

  /* Act II stats stack */
  .chapter-04 .chapter-inner.stats {
    grid-template-columns: 1fr;
    gap: 1.8rem;
    padding: 22px 20px;
  }
  .stat-number { font-size: clamp(4.5rem, 22vw, 8rem); -webkit-text-stroke-width: 1.1px; }
  .stat-desc { font-size: 1rem; }

  /* Act II chapter 05 - video + text stacked */
  .chapter-05 .chapter-inner.split {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 20px;
    max-width: 100%;
    width: calc(100vw - 32px);
  }
  .split-right {
    aspect-ratio: 16/9;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
  }

  /* Act III chapter 06 editorial */
  .chapter-06 .chapter-inner.editorial {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 22px 20px;
  }
  .editorial-head { margin-bottom: 14px; }
  .project-card { padding: 22px 0; }
  .project-loc { margin-bottom: 12px; }
  .project-name { font-size: clamp(2.6rem, 11vw, 3.6rem); margin-bottom: 14px; }
  .project-verse { font-size: 1rem; line-height: 1.8; }

  /* Act III chapter 07 finale + CTA stack */
  .chapter-07 .chapter-inner.finale {
    gap: 1.6rem;
    padding: 22px 20px;
  }
  .finale-title { font-size: clamp(3rem, 13vw, 5rem); }
  .cta-triple { grid-template-columns: 1fr; gap: 10px; }
  .cta-card { padding: 18px 18px; gap: 4px; }
  .cta-card.cta-form { grid-column: auto; }
  .cta-label { font-size: 0.6rem; letter-spacing: 0.22rem; }
  .cta-value { font-size: clamp(1.2rem, 4.5vw, 1.6rem); }
  .cta-note { font-size: 0.72rem; }
  .finale-meta { font-size: 0.68rem; }

  /* Hide HUD labels on phone — not enough real estate */
  .hud { display: none; }

  .marquee { bottom: 4%; }
  .marquee-track { font-size: 24vw; }

  .contact-modal form { padding: 24px 20px; gap: 12px; }
  .contact-modal h2 { font-size: 1.5rem; }
}

/* ===== Small phones (<420px) ===== */
@media (max-width: 419px) {
  :root {
    --fs-display-xl: clamp(3.5rem, 20vw, 5.5rem);
    --fs-display-l: clamp(2rem, 10vw, 2.8rem);
  }
  .chapter-inner { padding: 18px 16px; }
  .chapter-body { font-size: 0.92rem; }
  .project-verse { font-size: 0.92rem; }
}

/* ===== Tall portrait only (optional tweak) ===== */
@media (max-width: 767px) and (orientation: portrait) {
  .marquee { bottom: 6%; }
}

/* ===== Prefers Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .grain { display: none; }
  .canvas-wrap { clip-path: none !important; }
  .marquee-track { transform: none !important; }
  .hud.is-active { transform: none !important; }
}

/* ===== a11y focus ring ===== */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}