/* ============================================================
   CHUN.EN v5 — Cinematic Editorial Redesign
   ============================================================
   Reference DNA:
   - Huntsman Savile Row: bespoke journey narrative
   - Kelly Wearstler: one-person brand gravitas
   - Aman: fullscreen imagery, huge serif, slow reveals
   - Obys/Lindbergh: scroll-triggered motion
   ============================================================ */

:root {
  --ink: #14100B;
  --ink-soft: #241D14;
  --paper: #F5F1E8;
  --paper-dim: #CFC5B4;
  --gold: #A88A5C;
  --gold-light: #C9A96E;
  --muted: #8B7D6B;
  --hairline: rgba(245, 241, 232, 0.14);

  --serif-en: 'Cormorant Garamond', serif;
  --serif-tc: 'Noto Serif TC', serif;
  --wordmark: 'Italiana', serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --reveal-dur: 1.1s;
}

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

html {
  background: var(--ink);
  scroll-behavior: smooth;
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif-tc);
  font-weight: 300;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--gold); color: var(--ink); }

/* ============ Reveal 動效 ============ */
.rv {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity var(--reveal-dur) var(--ease-out),
    transform var(--reveal-dur) var(--ease-out);
}
.rv.in {
  opacity: 1;
  transform: translateY(0);
}
.rv-d1 { transition-delay: 0.12s; }
.rv-d2 { transition-delay: 0.24s; }
.rv-d3 { transition-delay: 0.36s; }

@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ 通用 ============ */
.wrap {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 4rem);
}

.chapter-tag {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--gold);
}
.chapter-tag::before {
  content: "";
  width: 44px;
  height: 1px;
  background: var(--gold);
  opacity: 0.7;
}
.chapter-tag .cn {
  color: var(--paper-dim);
  letter-spacing: 0.3em;
  font-family: var(--serif-tc);
  font-weight: 300;
}

.display {
  font-family: var(--serif-tc);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: 0.02em;
}
.display em {
  font-style: normal;
  color: var(--gold-light);
}
.display .en-it {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 500;
}

.lead {
  color: var(--paper-dim);
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
  line-height: 2.1;
  font-weight: 300;
  max-width: 34em;
}

/* ============ CTA ============ */
.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--serif-tc);
  font-size: 0.92rem;
  letter-spacing: 0.28em;
  color: var(--paper);
  padding: 1.05rem 2.4rem;
  border: 1px solid rgba(245, 241, 232, 0.4);
  transition: all 0.6s var(--ease-out);
  cursor: pointer;
  background: transparent;
}
.cta:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.cta--gold {
  border-color: var(--gold);
  color: var(--gold-light);
}
.cta--gold:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}
.cta-line {
  font-size: 0.85rem;
  letter-spacing: 0.24em;
  color: var(--muted);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 4px;
  transition: all 0.5s var(--ease-out);
}
.cta-line:hover { color: var(--gold-light); border-color: var(--gold); }

/* ============ NAV ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(env(safe-area-inset-top), 1.1rem) clamp(1.25rem, 4vw, 3rem) 1.1rem;
  transition: background 0.6s var(--ease-out), backdrop-filter 0.6s;
}
.nav.scrolled {
  background: rgba(20, 16, 11, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.nav-brand {
  font-family: var(--wordmark);
  font-size: 1.45rem;
  letter-spacing: 0.34em;
  color: var(--paper);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.6rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.82rem;
  letter-spacing: 0.26em;
  color: var(--paper-dim);
  transition: color 0.4s;
}
.nav-links a:hover { color: var(--gold-light); }
.nav-links .nav-book {
  color: var(--gold-light);
  border: 1px solid rgba(168, 138, 92, 0.5);
  padding: 0.55rem 1.4rem;
  transition: all 0.5s var(--ease-out);
}
.nav-links .nav-book:hover {
  background: var(--gold);
  color: var(--ink);
}
.nav-burger {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 44px; height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
}
.nav-burger span {
  width: 26px; height: 1px;
  background: var(--paper);
  transition: all 0.4s var(--ease-out);
}

/* Mobile menu */
.mnav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(20, 16, 11, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(1.1rem, 3.2vh, 2.2rem);
  /* 內容超過螢幕時可捲動，並讓上下留出 nav / home indicator 空間 */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding:
    calc(max(env(safe-area-inset-top), 1rem) + 72px)
    1.5rem
    max(env(safe-area-inset-bottom), 2rem);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease-out);
}
.mnav.open { opacity: 1; pointer-events: auto; }
.mnav a {
  font-family: var(--serif-tc);
  font-weight: 300;
  font-size: clamp(1.25rem, 4.8vw, 1.6rem);
  letter-spacing: 0.3em;
  color: var(--paper);
  text-align: center;
  flex-shrink: 0;
}
.mnav a:active { color: var(--gold-light); }
.mnav .mnav-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  display: block;
  text-align: center;
  margin-bottom: 0.25rem;
}
body.mnav-lock { overflow: hidden; }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-media video,
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.62) saturate(0.92);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg,
      rgba(20,16,11,0.55) 0%,
      rgba(20,16,11,0.12) 34%,
      rgba(20,16,11,0.24) 62%,
      rgba(20,16,11,0.92) 100%);
}
.hero-inner {
  width: 100%;
  padding-bottom: clamp(3rem, 7vh, 6rem);
}
.hero-eyebrow {
  font-family: var(--serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 1.6rem;
}
.hero-eyebrow .sep { opacity: 0.45; margin: 0 0.8em; }
.hero h1 {
  font-family: var(--serif-tc);
  font-weight: 300;
  font-size: clamp(2.5rem, 7.2vw, 6.4rem);
  line-height: 1.22;
  letter-spacing: 0.03em;
  max-width: 15em;
}
.hero h1 em {
  font-style: normal;
  color: var(--gold-light);
}
.hero-sub {
  margin-top: 1.8rem;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(0.9rem, 1.4vw, 1.15rem);
  letter-spacing: 0.14em;
  color: var(--paper-dim);
}
.hero-ctas {
  margin-top: 2.6rem;
  display: flex;
  gap: 1.6rem;
  flex-wrap: wrap;
  align-items: center;
}
.hero-scroll {
  position: absolute;
  right: clamp(1.25rem, 4vw, 3rem);
  bottom: clamp(3rem, 7vh, 6rem);
  writing-mode: vertical-rl;
  font-family: var(--serif-en);
  font-size: 0.66rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.hero-scroll::after {
  content: "";
  width: 1px;
  height: 56px;
  background: linear-gradient(var(--gold), transparent);
  animation: scrollPulse 2.4s var(--ease-out) infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ============ 章節共通 ============ */
.chapter {
  padding: clamp(5.5rem, 13vh, 10rem) 0;
  position: relative;
}

/* ============ CH01 MANIFESTO ============ */
.manifesto { text-align: center; }
.manifesto .chapter-tag {
  justify-content: center;
}
.manifesto .chapter-tag::before { display: none; }
.manifesto blockquote {
  margin-top: clamp(2.5rem, 6vh, 4.5rem);
}
.manifesto .quote-mark {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(4rem, 8vw, 7rem);
  line-height: 0.5;
  color: var(--gold);
  opacity: 0.45;
  display: block;
  margin-bottom: 1.6rem;
}
.manifesto p.big {
  font-size: clamp(1.55rem, 3.6vw, 3rem);
  line-height: 1.6;
  font-weight: 300;
  max-width: 22em;
  margin: 0 auto;
}
.manifesto p.big em { font-style: normal; color: var(--gold-light); }
.manifesto cite {
  display: block;
  margin-top: 2.8rem;
  font-family: var(--serif-en);
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ============ CH02 JOURNEY ============ */
.journey-head {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  margin-bottom: clamp(3rem, 8vh, 6rem);
  max-width: 40em;
}
.journey-head h2 {
  font-size: clamp(2rem, 4.6vw, 3.8rem);
  font-weight: 300;
  line-height: 1.3;
}
.journey-head h2 em { font-style: normal; color: var(--gold-light); }
.journey-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hairline);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.journey-step {
  background: var(--ink);
  padding: clamp(2rem, 3.5vw, 3.2rem) clamp(1.4rem, 2.4vw, 2.4rem) clamp(2.4rem, 4vw, 3.6rem);
  position: relative;
  transition: background 0.7s var(--ease-out);
}
.journey-step:hover { background: var(--ink-soft); }
.journey-num {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.6rem, 4.4vw, 4rem);
  color: var(--gold);
  opacity: 0.85;
  line-height: 1;
}
.journey-step h3 {
  margin-top: 1.6rem;
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  font-weight: 400;
  letter-spacing: 0.14em;
}
.journey-step .en {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.journey-step p {
  margin-top: 1.3rem;
  font-size: 0.9rem;
  line-height: 2;
  color: var(--paper-dim);
}

/* ============ CH03 STUDIOS ============ */
.studio-panel {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: center;
  padding: clamp(3rem, 8vh, 6rem) 0;
}
.studio-panel + .studio-panel {
  border-top: 1px solid var(--hairline);
}
.studio-media {
  grid-column: 1 / 8;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.studio-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.9);
  transform: scale(1.06);
  transition: transform 1.4s var(--ease-out), filter 1.4s var(--ease-out);
}
.studio-panel:hover .studio-media img {
  transform: scale(1.0);
  filter: brightness(1);
}
.studio-text { grid-column: 8 / 13; }
.studio-panel.rev .studio-media { grid-column: 6 / 13; order: 2; }
.studio-panel.rev .studio-text { grid-column: 1 / 6; order: 1; }
.studio-index {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--gold);
}
.studio-text h3 {
  margin-top: 1.2rem;
  font-family: var(--serif-en);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.1;
  color: var(--paper);
}
.studio-text .cn-name {
  display: block;
  margin-top: 0.7rem;
  font-size: 1.1rem;
  letter-spacing: 0.5em;
  color: var(--gold-light);
  font-weight: 300;
}
.studio-text p {
  margin-top: 1.6rem;
  font-size: 0.94rem;
  line-height: 2.05;
  color: var(--paper-dim);
  max-width: 30em;
}
.studio-text .cta-line { display: inline-block; margin-top: 1.8rem; }

/* ============ CH04 WORKS ============ */
.works-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: clamp(3rem, 7vh, 5rem);
}
.works-head h2 {
  font-size: clamp(2rem, 4.6vw, 3.8rem);
  font-weight: 300;
  line-height: 1.3;
}
.works-head h2 em { font-style: normal; color: var(--gold-light); }
.works-note {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  max-width: 22em;
  line-height: 2;
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1.2rem, 2.6vw, 2.6rem);
  row-gap: clamp(2.4rem, 5vw, 4.5rem);
}
.work {
  position: relative;
  overflow: hidden;
}
.work img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.94);
  transform: scale(1.045);
  transition: transform 1.3s var(--ease-out), filter 1.3s var(--ease-out);
}
.work:hover img {
  transform: scale(1.0);
  filter: brightness(1.04);
}
.work figcaption {
  margin-top: 0.9rem;
  font-family: var(--serif-en);
  font-size: 0.66rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}
/* Editorial 排列節奏 */
.work:nth-child(6n+1) { grid-column: 1 / 6;  aspect-ratio: 3/4; }
.work:nth-child(6n+2) { grid-column: 7 / 13; aspect-ratio: 4/5; margin-top: clamp(2rem, 6vw, 5rem); }
.work:nth-child(6n+3) { grid-column: 2 / 7;  aspect-ratio: 4/5; }
.work:nth-child(6n+4) { grid-column: 8 / 13; aspect-ratio: 3/4; margin-top: clamp(1.5rem, 4vw, 3.5rem); }
.work:nth-child(6n+5) { grid-column: 1 / 7;  aspect-ratio: 4/5; }
.work:nth-child(6n+6) { grid-column: 8 / 12; aspect-ratio: 3/4; margin-top: clamp(2rem, 6vw, 5rem); }
.work { display: flex; flex-direction: column; }
.work .imgbox { overflow: hidden; flex: 1; }
.work .imgbox img { height: 100%; }

/* ============ CH05 BLUEPRINT ============ */
.blueprint {
  background:
    radial-gradient(ellipse 90% 70% at 50% 110%, rgba(168,138,92,0.16), transparent 65%),
    var(--ink-soft);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  text-align: center;
}
.blueprint .chapter-tag { justify-content: center; }
.blueprint .chapter-tag::before { display: none; }
.blueprint h2 {
  margin-top: 2.4rem;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 300;
  line-height: 1.4;
}
.blueprint h2 .en-it {
  display: block;
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-top: 1rem;
}
.blueprint p.lead {
  margin: 2.2rem auto 0;
  text-align: center;
}
.blueprint .hero-ctas { justify-content: center; }

/* ============ FOUNDER ============ */
.founder {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: center;
}
.founder-media {
  grid-column: 1 / 6;
  aspect-ratio: 3 / 4;
  overflow: hidden;
}
.founder-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.92);
}
.founder-text { grid-column: 7 / 13; }
.founder-text h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.9rem);
  font-weight: 300;
  line-height: 1.45;
  margin-top: 1.6rem;
}
.founder-text h2 em { font-style: normal; color: var(--gold-light); }
.founder-text .lead { margin-top: 1.8rem; }

/* ============ CH06 ATELIER ============ */
.atelier-media {
  margin-top: clamp(2.5rem, 6vh, 4.5rem);
  aspect-ratio: 21 / 9;
  overflow: hidden;
}
.atelier-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.85);
}
.atelier-foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}
.atelier-addr {
  font-size: 0.92rem;
  line-height: 2.1;
  color: var(--paper-dim);
  letter-spacing: 0.06em;
}
.atelier-addr strong {
  display: block;
  font-weight: 400;
  color: var(--paper);
  letter-spacing: 0.2em;
  margin-bottom: 0.4rem;
}

/* ============ FINAL CTA ============ */
.final {
  text-align: center;
  padding: clamp(6rem, 16vh, 12rem) 0;
}
.final h2 {
  font-size: clamp(2.4rem, 6.6vw, 5.6rem);
  font-weight: 300;
  line-height: 1.3;
}
.final h2 em { font-style: normal; color: var(--gold-light); }
.final .en-sub {
  margin-top: 1.4rem;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(0.85rem, 1.3vw, 1.05rem);
  letter-spacing: 0.2em;
  color: var(--muted);
}
.final .hero-ctas {
  justify-content: center;
  margin-top: 3rem;
}

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 2.6rem 0 max(env(safe-area-inset-bottom), 2.6rem);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.6rem;
  flex-wrap: wrap;
}
.footer-brand {
  font-family: var(--wordmark);
  font-size: 1.1rem;
  letter-spacing: 0.34em;
}
.footer-meta {
  font-family: var(--serif-en);
  font-size: 0.66rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer-links {
  display: flex;
  gap: 1.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--paper-dim);
}
.footer-links a:hover { color: var(--gold-light); }

/* ============ 手機 ≤ 860px ============ */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }

  .hero h1 { font-size: clamp(2.2rem, 10vw, 3.4rem); }
  .hero-scroll { display: none; }

  .journey-grid { grid-template-columns: 1fr; }
  .journey-step {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 1.6rem;
    padding: 1.8rem 1.4rem;
  }
  .journey-num { grid-row: 1 / 4; font-size: 2.2rem; }
  .journey-step h3 { margin-top: 0; }
  .journey-step p { margin-top: 0.8rem; }

  .studio-panel,
  .studio-panel.rev {
    grid-template-columns: 1fr;
    padding: clamp(2.4rem, 7vw, 4rem) 0;
  }
  .studio-media,
  .studio-panel.rev .studio-media { grid-column: 1 / -1; order: 1; }
  .studio-text,
  .studio-panel.rev .studio-text { grid-column: 1 / -1; order: 2; }

  .works-grid { grid-template-columns: 1fr 1fr; gap: 1rem; row-gap: 2.2rem; }
  .work:nth-child(6n+1),
  .work:nth-child(6n+3),
  .work:nth-child(6n+5) { grid-column: 1 / 2; aspect-ratio: 3/4; margin-top: 0; }
  .work:nth-child(6n+2),
  .work:nth-child(6n+4),
  .work:nth-child(6n+6) { grid-column: 2 / 3; aspect-ratio: 3/4; margin-top: 2.4rem; }

  .founder { grid-template-columns: 1fr; }
  .founder-media { grid-column: 1 / -1; }
  .founder-text { grid-column: 1 / -1; }

  .atelier-media { aspect-ratio: 4 / 3; }
}