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

/* ── INTRO ── */
#intro {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
#intro.hide { pointer-events: none; }

#intro-bg {
  position: absolute; inset: 0; z-index: 0;
  background: #0a0a0a;
  transition: opacity 1.6s ease;
}
#intro.hide #intro-bg { opacity: 0; }

#intro-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center;
  transition: opacity 0.6s ease 1s;
}
#intro.hide #intro-content { opacity: 0; }

#intro-logo {
  display: flex;
  font-family: 'Montserrat', sans-serif;
  font-weight: 400;
  font-size: clamp(52px, 12vw, 108px);
  letter-spacing: .5em;
  color: var(--white);
  padding-left: .5em;
}
.intro-char {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  animation: introCharIn 1.1s cubic-bezier(.16,1,.3,1) both;
  animation-delay: calc(var(--i) * 0.18s + 0.8s);
}
@keyframes introCharIn {
  to { opacity: 1; transform: translateY(0); }
}
#intro-sub {
  font-size: 18px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--muted); margin-top: 22px;
  opacity: 0;
  animation: introFadeIn 1s ease 2.4s both;
}
#intro-line {
  width: 0; height: 1px;
  background: var(--gold);
  margin-top: 36px;
  animation: introLineIn 1.2s ease 3.2s both;
}
@keyframes introLineIn { to { width: 100px; } }
@keyframes introFadeIn { to { opacity: 1; } }

#intro-skip {
  position: fixed; bottom: 36px; right: 48px;
  background: none; border: none; cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-size: 9px; letter-spacing: .3em; text-transform: lowercase;
  color: rgba(245,242,238,.35);
  opacity: 0;
  animation: introFadeIn .6s ease 1s both;
  transition: color .3s;
  padding: 8px;
}
#intro-skip:hover { color: var(--white); }

:root {
  --gold: #b09060;
  --white: #f5f2ee;
  --muted: rgba(245,242,238,.55);
}

html {
  overflow-y: scroll;
  scrollbar-width: none;
}
html::-webkit-scrollbar { display: none; }

body {
  height: 100%;
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  background: #0a0a0a;
  color: var(--white);
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 32px 48px;
  pointer-events: none;
}
nav * { pointer-events: all; }

.nav-logo-mark a {
  font-size: 22px; letter-spacing: .45em;
  color: var(--white); text-decoration: none; opacity: .75;
  transition: opacity .3s;
}
.nav-logo-mark a:hover { opacity: 1; }

.nav-links {
  display: flex; flex-direction: column; align-items: flex-end; gap: 6px;
  list-style: none;
}
.nav-links a {
  font-family: 'Montserrat', sans-serif;
  font-size: 11px; font-weight: 400; letter-spacing: .45em;
  text-transform: uppercase;
  color: var(--white); text-decoration: none; opacity: .5;
  transition: opacity .3s;
}
.nav-links a:hover { opacity: 1; }

/* ── SLIDE ── */
.slide {
  width: 100vw; height: 100vh;
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}

/* photo backgrounds — dark cinematic gradients as placeholders */
.slide-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  overflow: hidden;
}
.slide-bg img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  display: block;
  transform-origin: center center;
  transform: scale(1.0);
  transition: none;
}

/* Ken Burns: アクティブになったら起動 */
@keyframes kenburns {
  from { transform: scale(1.0); }
  to   { transform: scale(1.08); }
}
.slide.active .slide-bg img {
  animation: kenburns 10s ease-out forwards;
}

/* per-slide colour palettes */
.s1 .slide-bg {
  background: linear-gradient(160deg, #0d0b09 0%, #1a1510 50%, #0a0807 100%);
  background-image: url('../images/projects/ext-01.jpg');
  background-size: cover; background-position: center;
}
.s2 .slide-bg {
  background: linear-gradient(170deg, #080c10 0%, #111820 55%, #060a0d 100%);
  background-image: url('../images/projects/int-01.jpg');
  background-size: cover; background-position: center;
}
.s3 .slide-bg {
  background: linear-gradient(150deg, #0e0d0b 0%, #1c1a15 55%, #090807 100%);
  background-image: url('../images/projects/ext-02.jpg');
  background-size: cover; background-position: center;
}
.s4 .slide-bg {
  background: linear-gradient(165deg, #0a0e0c 0%, #131a16 55%, #070b09 100%);
  background-image: url('../images/projects/int-06.jpg');
  background-size: cover; background-position: center;
}
.s5 { background: #080808; }

/* dark cinematic overlay */
.slide-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: rgba(0,0,0,0.45);
  pointer-events: none;
}

/* subtle grain texture overlay */
.slide-grain {
  position: absolute; inset: 0; z-index: 1; opacity: .35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  mix-blend-mode: overlay; pointer-events: none;
}

/* vignette */
.slide-vignette {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: radial-gradient(ellipse 80% 80% at 50% 50%, transparent 30%, rgba(0,0,0,.55) 100%);
}

/* faint horizontal rule near bottom of slides */
.slide::after {
  content: '';
  position: absolute; bottom: 80px; left: 50%; transform: translateX(-50%);
  width: 1px; height: 32px; background: rgba(176,144,96,.3);
  z-index: 5;
}
.slide:last-child::after { display: none; }

/* ── SLIDE CONTENT ── */
.slide-content {
  position: relative; z-index: 10;
  text-align: center;
  padding: 0 40px;
  max-width: 900px;
}

.slide-eyebrow {
  font-size: 16px; letter-spacing: .45em; text-transform: uppercase;
  font-weight: 400;
  color: var(--gold); margin-bottom: 32px;
  opacity: 0; transform: translateY(14px);
  transition: opacity .9s ease, transform .9s ease;
  position: relative; display: inline-block;
}
.slide-eyebrow::after {
  content: '';
  display: block;
  width: 28px; height: 1px;
  background: var(--gold);
  margin-top: 14px;
  opacity: .7;
}
.slide-title {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 300;
  font-size: clamp(36px, 7vw, 96px);
  line-height: 1.0; letter-spacing: -.01em;
  opacity: 0; transform: translateY(18px);
  transition: opacity 1s ease .1s, transform 1s ease .1s;
}
.slide-title em { font-style: italic; color: var(--white); }
.slide-sub {
  font-size: 18px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--muted); margin-top: 24px;
  opacity: 0; transform: translateY(14px);
  transition: opacity .9s ease .2s, transform .9s ease .2s;
}
.slide-cta {
  display: inline-block; margin-top: 40px;
  font-size: 18px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--white); text-decoration: none;
  border: 1px solid rgba(245,242,238,.4);
  padding: 13px 32px;
  opacity: 0; transform: translateY(14px);
  transition: opacity .9s ease .32s, transform .9s ease .32s, border-color .3s, color .3s;
}
.slide-cta:hover { border-color: var(--gold); color: var(--gold); }

/* animate in when slide is active */
.slide.active .slide-eyebrow,
.slide.active .slide-title,
.slide.active .slide-sub,
.slide.active .slide-cta {
  opacity: 1; transform: translateY(0);
}

/* ── HERO specific — logo centred ── */
.hero-logo {
  font-family: 'Montserrat', sans-serif;
  font-weight: 400; font-size: clamp(52px, 12vw, 108px);
  letter-spacing: .5em; color: var(--white);
  padding-left: .5em;
  margin-bottom: 0;
}
/* s1 (hero): introが表示中は非表示、intro退場後に.revealで表示
   intro-subとの二重描画（太さ変化に見える）を防ぐ */
.s1 .slide-sub {
  margin-top: 22px;
  transform: none;
  opacity: 0;
  transition: none;
}
.s1 .slide-sub.reveal {
  opacity: 1;
  transition: opacity .6s ease;
}
.s1.slide.active .slide-sub {
  transform: none; /* .slide.active .slide-subのtranslateY(0)を上書き */
}
.hero-line {
  width: 0; height: 1px;
  background: var(--gold);
  margin: 36px auto 0;
  opacity: 0;
  transition: width 1.2s ease .4s, opacity .6s ease .3s;
}
.slide.active .hero-line { width: 100px; opacity: .7; }

/* ── PRODUCER SLIDE — photo + text split ── */
.s5 { overflow: hidden; }
.producer-layout {
  display: grid; grid-template-columns: 42% 1fr;
  height: 100vh; width: 100%; align-items: stretch;
  position: relative; z-index: 10;
}
.prod-photo {
  position: relative; overflow: hidden;
  opacity: 0; transform: translateX(-24px);
  transition: opacity 1.1s ease .1s, transform 1.1s ease .1s;
}
.slide.active .prod-photo { opacity: 1; transform: translateX(0); }
.prod-photo img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center top;
  filter: grayscale(100%) contrast(1.05);
  display: block;
}
.prod-right {
  display: flex; flex-direction: column; justify-content: center;
  padding: 80px 80px 80px 72px;
  text-align: left;
  opacity: 0; transform: translateY(18px);
  transition: opacity 1s ease .4s, transform 1s ease .4s;
}
.slide.active .prod-right { opacity: 1; transform: translateY(0); }
.prod-title { font-size: clamp(32px, 4vw, 72px); text-align: left; }
.prod-name-jp {
  font-family: 'Cormorant Garamond', serif;
  font-size: 22px; letter-spacing: .3em; color: var(--gold);
  margin-bottom: 28px;
}
.prod-bio {
  font-size: 18px; line-height: 2; color: var(--muted); margin-bottom: 28px;
}
.prod-quote {
  font-family: 'Cormorant Garamond', serif;
  font-size: 18px; font-style: italic; font-weight: 300;
  line-height: 1.6; color: rgba(245,242,238,.75);
  border-left: 1px solid var(--gold); padding-left: 24px;
}

/* ── GIANT OUTLINE LETTERS ── */
.slide-giant-bg {
  position: absolute; inset: 0; z-index: 1;
  display: flex; align-items: center; justify-content: space-between;
  overflow: hidden; pointer-events: none;
}
.giant-letter {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: clamp(240px, 38vw, 500px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(176,144,96,.22);
  text-stroke: 1px rgba(176,144,96,.22);
  user-select: none;
  letter-spacing: -.02em;
  opacity: 0;
  transition: opacity 1.4s ease .3s;
}
.slide.active .giant-letter { opacity: 1; }
.gl-l { transform: translateX(-12%); }
.gl-r { transform: translateX(12%); }

/* ── FOOTER SLIDE ── */
.footer-slide {
  background: #080808;
  flex-direction: column; justify-content: center; gap: 0;
}
.footer-slide::after { display: none; }
.footer-links-row {
  display: flex; gap: 48px; margin-top: 60px;
  opacity: 0; transform: translateY(14px);
  transition: opacity .9s ease .4s, transform .9s ease .4s;
}
.slide.active .footer-links-row { opacity: 1; transform: translateY(0); }
.footer-links-row a {
  font-size: 18px; letter-spacing: .3em; text-transform: uppercase;
  color: rgba(245,242,238,.4); text-decoration: none; transition: color .3s;
}
.footer-links-row a:hover { color: var(--gold); }
.contact-address {
  margin-top: 32px;
  opacity: 0; transform: translateY(12px);
  transition: opacity .9s ease .45s, transform .9s ease .45s;
}
.slide.active .contact-address { opacity: 1; transform: translateY(0); }
.contact-address p {
  font-size: 18px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); line-height: 2.2;
}

.footer-copy {
  margin-top: 80px; font-size: 16px; letter-spacing: .2em;
  color: rgba(245,242,238,.2);
  opacity: 0; transition: opacity .9s ease .5s;
}
.slide.active .footer-copy { opacity: 1; }


/* ── SOUND BUTTON ── */
#sound-btn {
  position: fixed; bottom: 36px; left: 48px; z-index: 300;
  background: none; border: none; cursor: pointer;
  color: var(--white); opacity: .45;
  transition: opacity .3s;
  padding: 8px;
}
#sound-btn:hover { opacity: 1; }
@media (max-width: 768px) { #sound-btn { bottom: 24px; left: 24px; } }

/* ── PROGRESS DOTS ── */
.progress {
  position: fixed; right: 36px; top: 50%; transform: translateY(-50%);
  z-index: 300;
  display: flex; flex-direction: column; gap: 12px;
}
.dot {
  width: 4px; height: 4px; border-radius: 50%;
  background: rgba(245,242,238,.25);
  cursor: pointer; transition: background .3s, transform .3s;
}
.dot.active { background: var(--gold); transform: scale(1.4); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  nav { padding: 20px 24px; }
  .nav-links { display: none; }
  .nav-logo-mark { width: 100%; text-align: left; }

  /* introのサブテキストをheroのサブテキストと同サイズに（サイズ差によるズレ防止） */
  #intro-sub { font-size: 14px; letter-spacing: .15em; }

  /* スライドコンテンツが固定navに隠れないよう上パディング */
  .slide-content { padding: 72px 24px 48px; max-width: 100%; }
  /* ヒーローは中央寄せをキープしつつnavよりは下に */
  .s1 .slide-content { padding-top: 0; }

  .slide-eyebrow { font-size: 12px; letter-spacing: .35em; margin-bottom: 20px; }
  .slide-sub { font-size: 13px; letter-spacing: .12em; }
  .slide-cta { font-size: 13px; letter-spacing: .25em; padding: 11px 28px; }

  /* プロデューサースライド: 上下分割 */
  .producer-layout { grid-template-columns: 1fr; }
  .prod-photo { height: 52vh; }
  .prod-right {
    padding: 28px 24px 80px; /* 下にsound btnとのスペース確保 */
    justify-content: flex-start;
  }
  .prod-bio { display: none; }
  .prod-title { font-size: clamp(28px, 7vw, 52px) !important; }
  .prod-name-jp { font-size: 16px; letter-spacing: .2em; margin-bottom: 16px; }
  .prod-quote { font-size: 14px; }

  /* コンタクトスライドのフッターリンク */
  .footer-links-row {
    flex-wrap: wrap; justify-content: center;
    gap: 16px 28px; margin-top: 32px;
  }
  .footer-links-row a { font-size: 12px; letter-spacing: .22em; }
  .contact-address p { font-size: 13px; letter-spacing: .1em; line-height: 2; }
  .footer-copy { font-size: 11px; margin-top: 48px; }

  .progress { right: 12px; }
  #sound-btn { bottom: 24px; left: 24px; }
}

@media (max-width: 390px) {
  .hero-logo { letter-spacing: .35em; font-size: clamp(40px, 11vw, 80px); }
  .slide-title { font-size: clamp(28px, 9vw, 56px); }
  .slide-sub { font-size: 11px; letter-spacing: .1em; }
  #intro-sub { font-size: 11px; letter-spacing: .1em; }
}