/* =========================================================================
   SAKURAZAKA46 — NIGHT BLOOM  (v2)
   Night blooms. Then dawn.  Black-based, dawn-reversal on final chapter.
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  --black:  #070509;   /* deepest night, purple-tinged, not pure black */
  --coal:   #100B12;
  --white:  #F7F2EE;   /* dawn white */
  --petal:  #F2A8C0;   /* pale cherry */
  --neon:   #FF4F8B;   /* night neon pink */
  --keyaki: #5C8A68;   /* Keyaki green — ORIGIN past only */
  --ash:    #8E8290;   /* ash */
  --hair-n: rgba(247,242,238,.13);

  /* theme-driven (night by default) */
  --bg:     var(--black);
  --fg:     var(--white);
  --fg-dim: var(--ash);
  --hair:   var(--hair-n);
  --accent: var(--neon);

  --w: min(1200px, 90vw);
  --pad: clamp(120px, 18vh, 240px);

  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-soft: cubic-bezier(.4, 0, .2, 1);

  --ff-disp: "Outfit", system-ui, sans-serif;
  --ff-serif: "Cormorant Garamond", Georgia, serif;
  --ff-jp: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --ff-ui: "Noto Sans JP", system-ui, sans-serif;
}

/* dawn reversal — applied to body[data-dawn] */
body[data-dawn] {
  --bg:     var(--white);
  --fg:     #1a1418;
  --fg-dim: #6f6470;
  --hair:   rgba(26,20,24,.14);
  --accent: var(--neon);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: clip; }       /* clip, never hidden (sticky killer) */
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ff-ui);
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  transition: background-color .9s var(--ease-soft), color .9s var(--ease-soft);
  overflow-x: clip;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ol, ul { list-style: none; }
[hidden] { display: none !important; }   /* author display rules must not resurrect hidden overlays */
main { position: relative; z-index: 2; } /* keeps content above the oshi ghost layer */
:focus-visible { outline: 2px solid var(--neon); outline-offset: 3px; border-radius: 2px; }

/* ---------- Film grain overlay (fixed, topmost) ---------- */
body::after {
  content: "";
  position: fixed; inset: 0;
  z-index: 9999;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: .045;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 160px 160px;
}

/* ---------- Loader ---------- */
.sv-loader {
  position: fixed; inset: 0; z-index: 10000;
  background: var(--black);
  display: grid; place-items: center;
  transition: opacity .6s var(--ease-soft);
}
.sv-loader__mark {
  font-family: var(--ff-jp); font-weight: 800;
  font-size: clamp(4rem, 14vw, 9rem);
  color: var(--white);
  opacity: 0;
  animation: sv-loader-in .8s var(--ease) forwards;
}
@keyframes sv-loader-in {
  0%   { opacity: 0; filter: blur(18px); transform: scale(.92); }
  60%  { opacity: 1; filter: blur(0); transform: scale(1); }
  100% { opacity: 1; }
}
body.sv-loaded .sv-loader { opacity: 0; pointer-events: none; }

/* ---------- Shared typography helpers ---------- */
.sv-kicker {
  font-family: var(--ff-disp); font-weight: 500;
  font-size: .72rem; letter-spacing: .42em; text-transform: uppercase;
  color: var(--fg-dim);
}
.sv-h2 {
  font-family: var(--ff-disp); font-weight: 200;
  font-size: clamp(2.4rem, 7vw, 6rem);
  line-height: .98; letter-spacing: .01em;
  margin-top: .5rem;
}
.sv-sub-jp {
  font-family: var(--ff-jp); font-weight: 600;
  color: var(--fg-dim);
  font-size: clamp(.95rem, 1.8vw, 1.25rem);
  letter-spacing: .04em;
  margin-top: 1rem;
}
.sv-lead {
  font-family: var(--ff-serif); font-style: italic;
  font-size: clamp(1.1rem, 2.2vw, 1.7rem);
  color: var(--fg);
  margin-top: 1.6rem; max-width: 30ch;
}

/* line-mask reveal */
.sv-mask { display: block; overflow: hidden; }
.sv-mask__in {
  display: block;
  transform: translateY(110%);
  transition: transform 1s var(--ease);
}
.sv-mask.is-in .sv-mask__in { transform: translateY(0); }

/* generic reveal */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }

/* =========================================================================
   OSHI WATCHER — fixed ghost portrait, right, behind main content
   ========================================================================= */
.sv-oshi {
  position: fixed; top: 50%; right: -3vw;
  transform: translateY(-50%);
  height: 66vh; aspect-ratio: 1 / 1;
  z-index: 1;                       /* under main (z2), over body bg */
  pointer-events: none;
  opacity: .18;
  transition: opacity .9s var(--ease-soft);
}
.sv-oshi img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  -webkit-mask-image: radial-gradient(75% 70% at 55% 42%, #000 46%, transparent 76%);
  mask-image: radial-gradient(75% 70% at 55% 42%, #000 46%, transparent 76%);
  filter: saturate(.85);
}
body[data-dawn] .sv-oshi { opacity: .12; }
@media (max-width: 1100px) { .sv-oshi { display: none; } } /* narrow screens: content first */
@media (prefers-reduced-motion: no-preference) {
  .sv-oshi img { animation: sv-oshi-float 9s ease-in-out infinite alternate; }
}
@keyframes sv-oshi-float { from { translate: 0 -6px; } to { translate: 0 6px; } }

/* deck "set as oshi" button */
.sv-deck__oshi {
  margin-top: 16px;
  display: inline-flex; align-items: baseline; gap: 10px;
  padding: 9px 18px; border: 1px solid var(--hair); border-radius: 999px;
  font-family: var(--ff-disp); font-weight: 600;
  font-size: .64rem; letter-spacing: .22em;
  color: var(--fg-dim);
  transition: border-color .3s, color .3s;
}
.sv-deck__oshi:hover { border-color: var(--accent); color: var(--fg); }
.sv-deck__oshi.is-set { border-color: var(--accent); color: var(--accent); }
.sv-deck__oshi-jp { font-family: var(--ff-ui); font-weight: 500; font-size: .6rem; letter-spacing: .12em; }

/* =========================================================================
   OSHI WATCHER — fixed ghost portrait, right, behind main content
   ========================================================================= */
.sv-oshi {
  position: fixed; top: 50%; right: -3vw;
  transform: translateY(-50%);
  height: 66vh; aspect-ratio: 1 / 1;
  z-index: 1;                       /* under main (z2), over body bg */
  pointer-events: none;
  opacity: .18;
  transition: opacity .9s var(--ease-soft);
}
.sv-oshi img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  -webkit-mask-image: radial-gradient(75% 70% at 55% 42%, #000 46%, transparent 76%);
  mask-image: radial-gradient(75% 70% at 55% 42%, #000 46%, transparent 76%);
  filter: saturate(.85);
}
body[data-dawn] .sv-oshi { opacity: .12; }
@media (max-width: 1100px) { .sv-oshi { display: none; } } /* narrow screens: content first */
@media (prefers-reduced-motion: no-preference) {
  .sv-oshi img { animation: sv-oshi-float 9s ease-in-out infinite alternate; }
}
@keyframes sv-oshi-float { from { translate: 0 -6px; } to { translate: 0 6px; } }

/* deck "set as oshi" button */
.sv-deck__oshi {
  margin-top: 16px;
  display: inline-flex; align-items: baseline; gap: 10px;
  padding: 9px 18px; border: 1px solid var(--hair); border-radius: 999px;
  font-family: var(--ff-disp); font-weight: 600;
  font-size: .64rem; letter-spacing: .22em;
  color: var(--fg-dim);
  transition: border-color .3s, color .3s;
}
.sv-deck__oshi:hover { border-color: var(--accent); color: var(--fg); }
.sv-deck__oshi.is-set { border-color: var(--accent); color: var(--accent); }
.sv-deck__oshi-jp { font-family: var(--ff-ui); font-weight: 500; font-size: .6rem; letter-spacing: .12em; }

/* =========================================================================
   CHAPTER RAIL HUD (left, fixed)
   ========================================================================= */
.sv-rail {
  position: fixed; left: clamp(18px, 2.4vw, 40px); top: 50%;
  transform: translateY(-50%);
  z-index: 200;
  display: flex; align-items: center; gap: 16px;
}
.sv-rail__list { display: flex; flex-direction: column; gap: 14px; }
.sv-rail__item a { display: flex; align-items: baseline; gap: 10px; opacity: .4; transition: opacity .4s var(--ease); }
.sv-rail__item.is-active a { opacity: 1; }
.sv-rail__no {
  font-family: var(--ff-disp); font-weight: 600; font-size: .62rem;
  letter-spacing: .1em; color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.sv-rail__name {
  font-family: var(--ff-disp); font-weight: 400; font-size: .58rem;
  letter-spacing: .26em; text-transform: uppercase; color: var(--fg);
  white-space: nowrap;
}
.sv-rail__track {
  position: relative; width: 1px; align-self: stretch; min-height: 120px;
  background: var(--hair);
}
.sv-rail__fill {
  position: absolute; top: 0; left: 0; width: 100%; height: 0%;
  background: var(--accent);
  transition: height .15s linear;
}

/* =========================================================================
   MENU (top-right) + overlay
   ========================================================================= */
.sv-menu-btn {
  position: fixed; top: clamp(18px, 2.6vw, 34px); right: clamp(18px, 2.6vw, 34px);
  z-index: 250;
  font-family: var(--ff-disp); font-weight: 500;
  font-size: .72rem; letter-spacing: .3em; text-transform: uppercase;
  color: var(--fg);
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
  transition: border-color .35s var(--ease), color .35s;
}
.sv-menu-btn:hover { border-color: var(--accent); }

.sv-menu {
  position: fixed; inset: 0; z-index: 300;
  background: var(--black);
  display: flex; flex-direction: column; justify-content: center;
  padding: clamp(40px, 8vw, 120px);
  opacity: 0; transition: opacity .5s var(--ease);
}
.sv-menu:not([hidden]) { display: flex; }
.sv-menu.is-open { opacity: 1; }
.sv-menu__close {
  position: absolute; top: clamp(18px, 2.6vw, 34px); right: clamp(18px, 2.6vw, 34px);
  font-family: var(--ff-disp); font-weight: 500; font-size: .72rem;
  letter-spacing: .3em; color: var(--white);
}
.sv-menu__nav { display: flex; flex-direction: column; gap: clamp(4px, 1.4vh, 14px); }
.sv-menu__nav a {
  font-family: var(--ff-disp); font-weight: 200;
  font-size: clamp(2rem, 7vw, 5rem); line-height: 1.05;
  color: var(--white); letter-spacing: .01em;
  display: flex; align-items: baseline; gap: 18px;
  transition: color .3s, transform .4s var(--ease);
}
.sv-menu__nav a:hover { color: var(--neon); transform: translateX(10px); }
.sv-menu__no {
  font-size: .8rem; font-weight: 600; letter-spacing: .12em; color: var(--neon);
  font-variant-numeric: tabular-nums;
}
.sv-menu__official { margin-top: clamp(30px, 6vh, 60px); display: flex; flex-wrap: wrap; gap: 8px 28px; align-items: baseline; }
.sv-menu__official-label { font-family: var(--ff-disp); font-size: .62rem; letter-spacing: .4em; color: var(--ash); }
.sv-menu__official a { font-family: var(--ff-disp); font-weight: 300; font-size: .95rem; color: var(--white); border-bottom: 1px solid var(--hair-n); padding-bottom: 2px; transition: border-color .3s; }
.sv-menu__official a:hover { border-color: var(--neon); }

/* =========================================================================
   CH 00 — HERO
   ========================================================================= */
.sv-hero {
  position: relative;
  height: 100svh; min-height: 560px;
  background: var(--black);
  overflow: hidden;
}
.sv-hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.sv-hero__copy {
  position: absolute; left: 50%; bottom: clamp(118px, 16vh, 180px);
  transform: translateX(-50%);
  text-align: center; width: var(--w);
}
.sv-hero__lead {
  font-family: var(--ff-serif); font-style: italic;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem); color: var(--white);
}
.sv-hero__lead-jp {
  font-family: var(--ff-jp); font-size: clamp(.85rem, 1.5vw, 1.05rem);
  color: var(--ash); margin-top: .8rem; letter-spacing: .12em;
}
.sv-hero__foot {
  position: absolute; left: 50%; bottom: clamp(28px, 5vh, 54px);
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  width: 100%;
}
.sv-hero__where {
  font-family: var(--ff-disp); font-weight: 400; font-size: .68rem;
  letter-spacing: .42em; color: var(--ash); text-transform: uppercase;
}
.sv-hero__cue {
  font-family: var(--ff-disp); font-weight: 300; font-size: .6rem;
  letter-spacing: .34em; color: var(--white); text-transform: uppercase;
  display: flex; flex-direction: column; align-items: center; gap: 10px; opacity: .85;
}
.sv-hero__cue i { display: block; width: 1px; height: 36px; background: linear-gradient(var(--neon), transparent); animation: sv-cue 2.4s var(--ease-soft) infinite; transform-origin: top; }
@keyframes sv-cue { 0%,100%{ transform: scaleY(.35); opacity:.4 } 50%{ transform: scaleY(1); opacity:1 } }

/* =========================================================================
   CH 01 — ORIGIN  (300vh sticky year scrub)
   ========================================================================= */
.sv-origin { position: relative; height: 300vh; }
.sv-origin__sticky {
  position: sticky; top: 0; height: 100svh; overflow: hidden;
  display: grid; place-items: center;
}
.sv-origin__bg { position: absolute; inset: 0; opacity: 0; transition: opacity .6s var(--ease-soft); }
.sv-origin__bg--keyaki {
  background:
    radial-gradient(120% 90% at 50% 40%, rgba(92,138,104,.16), transparent 60%),
    #0a0a0a;
  filter: saturate(0);
}
.sv-origin__bg--burn { background: #060406; }
.sv-origin__bg--sakura {
  background:
    radial-gradient(120% 90% at 50% 45%, rgba(255,79,139,.18), transparent 60%),
    radial-gradient(90% 70% at 70% 80%, rgba(242,168,192,.12), transparent 60%),
    var(--black);
}
.sv-origin__sticky[data-era="keyaki"] .sv-origin__bg--keyaki { opacity: 1; }
.sv-origin__sticky[data-era="burn"]   .sv-origin__bg--burn   { opacity: 1; }
.sv-origin__sticky[data-era="sakura"] .sv-origin__bg--sakura { opacity: 1; }

.sv-origin__year {
  position: absolute; right: clamp(12px, 5vw, 90px); top: 50%;
  transform: translateY(-50%);
  font-family: var(--ff-disp); font-weight: 100;
  font-size: clamp(5rem, 22vw, 18rem); line-height: .8;
  color: var(--white); opacity: .1;
  font-variant-numeric: tabular-nums;
  pointer-events: none; user-select: none;
}
.sv-origin__sticky[data-era="keyaki"] .sv-origin__year { color: var(--keyaki); }
.sv-origin__sticky[data-era="sakura"] .sv-origin__year { color: var(--neon); }

.sv-origin__stage {
  position: relative; z-index: 2; width: var(--w);
  display: grid; place-items: center;
}
.sv-origin__act {
  grid-area: 1 / 1; text-align: center; max-width: min(920px, 86vw);
  opacity: 0; transform: translateY(18px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
  pointer-events: none;
}
.sv-origin__act.is-on { opacity: 1; transform: none; pointer-events: auto; }
.sv-origin__en {
  font-family: var(--ff-disp); font-weight: 200;
  font-size: clamp(1.6rem, 4.4vw, 3.4rem); line-height: 1.14;
  letter-spacing: .01em; margin-top: 1rem;
  max-width: 24ch; margin-inline: auto; text-wrap: balance;
}
.sv-origin__en--burn { font-weight: 100; max-width: 18ch; margin-inline: auto; }
.sv-origin__jp {
  font-family: var(--ff-jp); font-weight: 600; color: var(--ash);
  font-size: clamp(.92rem, 1.8vw, 1.2rem); margin-top: 1.1rem; letter-spacing: .05em;
}
.sv-origin__data { margin-top: 1.8rem; font-family: var(--ff-serif); font-style: italic; color: var(--petal); font-size: clamp(1rem, 2vw, 1.4rem); }
.sv-origin__data-n { font-family: var(--ff-disp); font-style: normal; font-weight: 900; font-variant-numeric: tabular-nums; color: var(--white); }
.sv-origin__stats {
  display: flex; justify-content: center; gap: clamp(20px, 5vw, 64px);
  margin-top: 2rem; flex-wrap: wrap;
}
.sv-origin__stats li { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.sv-origin__stats b {
  font-family: var(--ff-disp); font-weight: 900; font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 4vw, 2.6rem); color: var(--white); line-height: 1;
}
.sv-origin__stats span { font-family: var(--ff-disp); font-size: .6rem; letter-spacing: .3em; color: var(--ash); }

/* =========================================================================
   CH 02 — THE SOUND
   ========================================================================= */
.sv-sound { padding: var(--pad) 0 0; }
.sv-sound__head, .sv-members__head, .sv-live__head, .sv-start__head { width: var(--w); margin: 0 auto; }

/* 4a doors */
.sv-doors { width: var(--w); margin: clamp(48px, 8vh, 96px) auto 0; }
.sv-doors__label { font-family: var(--ff-disp); font-weight: 500; font-size: .72rem; letter-spacing: .42em; color: var(--fg-dim); margin-bottom: 22px; }
.sv-doors__row { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(14px, 2vw, 26px); }
.sv-door {
  position: relative; display: flex; flex-direction: column;
  border: 1px solid var(--hair); background: var(--coal);
  overflow: hidden; cursor: pointer; text-align: left;
  transition: border-color .4s var(--ease), transform .5s var(--ease);
}
.sv-door:hover { border-color: var(--neon); transform: translateY(-4px); }
.sv-door__thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #000; }
.sv-door__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.sv-door:hover .sv-door__thumb img { transform: scale(1.04); }
.sv-door__play {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 2.2rem; color: var(--white);
  background: radial-gradient(closest-side, rgba(7,5,9,.35), rgba(7,5,9,0));
  opacity: .85; transition: opacity .3s;
}
.sv-door:hover .sv-door__play { opacity: 1; }
.sv-door__body { padding: clamp(16px, 2vw, 26px); }
.sv-door__tag { font-family: var(--ff-disp); font-weight: 800; font-size: clamp(1.4rem, 3vw, 2.2rem); letter-spacing: .04em; color: var(--neon); }
.sv-door__song { font-family: var(--ff-disp); font-weight: 300; font-size: 1rem; margin-top: 4px; color: var(--fg); }
.sv-door__song small { color: var(--fg-dim); font-weight: 400; }
.sv-door__en { font-family: var(--ff-serif); font-style: italic; font-size: 1.05rem; margin-top: 14px; color: var(--fg); }
.sv-door__jp { font-family: var(--ff-jp); font-size: .82rem; color: var(--fg-dim); margin-top: 6px; }

/* 4b strip */
.sv-strip { position: relative; height: 420vh; margin-top: var(--pad); }
.sv-strip__sticky { position: sticky; top: 0; height: 100svh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; }
.sv-strip__head { width: var(--w); margin: 0 auto 28px; }
.sv-strip__track {
  display: flex; gap: clamp(16px, 2vw, 30px); align-items: stretch;
  padding-left: max((100vw - var(--w)) / 2, 5vw);
  will-change: transform;
}
.sv-single {
  position: relative; flex: 0 0 auto; width: clamp(260px, 34vw, 380px);
  border: 1px solid var(--hair); background: var(--coal); overflow: hidden;
  display: flex; flex-direction: column; cursor: pointer;
  transition: border-color .4s var(--ease);
}
.sv-single:hover { border-color: var(--neon); }
.sv-single__thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #000; }
.sv-single__thumb img { width: 100%; height: 100%; object-fit: cover; }
.sv-single__no {
  position: absolute; left: 14px; bottom: 8px;
  font-family: var(--ff-disp); font-weight: 900; font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 6vw, 4.2rem); line-height: .8; color: var(--white);
  text-shadow: 0 2px 18px rgba(0,0,0,.6);
}
/* 両A面の副A面カード — 数字の代わりに W A-SIDE バッジ＋ネオンの縁取り */
.sv-single__no--coa {
  font-size: clamp(1.5rem, 3.4vw, 2.4rem); line-height: .9;
  display: inline-flex; align-items: baseline; gap: .18em; color: var(--neon);
}
.sv-single__no--coa small { font-size: .34em; font-weight: 700; letter-spacing: .18em; }
.sv-single--coa { border-color: color-mix(in srgb, var(--neon) 55%, transparent); }
.sv-single__body { padding: 16px clamp(14px, 1.6vw, 22px) 22px; }
.sv-single__title { font-family: var(--ff-disp); font-weight: 600; font-size: 1.15rem; line-height: 1.2; }
.sv-single__meta { font-family: var(--ff-disp); font-size: .72rem; letter-spacing: .12em; color: var(--fg-dim); margin-top: 8px; text-transform: uppercase; }
.sv-single--end {
  align-items: center; justify-content: center; text-align: center;
  border-style: dashed; cursor: default;
}
.sv-single--end span { font-family: var(--ff-disp); font-weight: 200; font-size: clamp(1.4rem, 3vw, 2.2rem); letter-spacing: .05em; color: var(--neon); }
.sv-strip__ruler {
  position: relative; width: var(--w); margin: 28px auto 0; height: 1px; background: var(--hair);
}
.sv-strip__ruler-fill { position: absolute; left: 0; top: 0; height: 100%; width: 0%; background: var(--neon); transition: width .1s linear; }
.sv-strip__ruler-a, .sv-strip__ruler-b { position: absolute; top: 10px; font-family: var(--ff-disp); font-size: .6rem; letter-spacing: .2em; color: var(--fg-dim); }
.sv-strip__ruler-a { left: 0; } .sv-strip__ruler-b { right: 0; }

/* =========================================================================
   CH 03 — THE MEMBERS  (spotlight deck)
   ========================================================================= */
.sv-members { padding: var(--pad) 0; }
.sv-members__h2 { max-width: 18ch; }
.sv-deck {
  position: relative; width: 100%; margin-top: clamp(40px, 7vh, 80px);
  outline: none;
}
.sv-deck__stage {
  position: relative; width: var(--w); margin: 0 auto;
  min-height: clamp(420px, 64vh, 680px);
  display: flex; align-items: flex-end; gap: clamp(20px, 4vw, 60px);
}
.sv-deck__photo-wrap {
  position: relative; flex: 0 0 auto;
  width: clamp(240px, 38vw, 460px); aspect-ratio: 1/1;
}
.sv-deck__photo {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  border-radius: 2px;
  opacity: 0; transition: opacity .55s var(--ease-soft), transform .7s var(--ease);
  transform: scale(1.02);
}
.sv-deck__photo.is-show { opacity: 1; transform: scale(1); }
.sv-deck__bigname {
  position: absolute; left: clamp(160px, 30vw, 360px); bottom: 8%;
  font-family: var(--ff-disp); font-weight: 100;
  font-size: clamp(2.4rem, 8vw, 7rem); line-height: .85;
  letter-spacing: .005em; color: var(--white);
  z-index: 3; pointer-events: none; white-space: nowrap;
  text-shadow: 0 4px 40px rgba(0,0,0,.5);
  transition: color .5s;
}
body[data-dawn] .sv-deck__bigname { color: var(--fg); }
.sv-deck__meta { position: relative; z-index: 4; padding-bottom: clamp(16px, 4vh, 50px); }
.sv-deck__name-ja { font-family: var(--ff-jp); font-weight: 700; font-size: clamp(1.4rem, 3vw, 2.2rem); }
.sv-deck__kana { font-family: var(--ff-jp); color: var(--fg-dim); font-size: .9rem; margin-top: 4px; letter-spacing: .08em; }
.sv-deck__gen { font-family: var(--ff-disp); font-size: .68rem; letter-spacing: .26em; color: var(--fg-dim); margin-top: 12px; text-transform: uppercase; }
.sv-deck__centers { margin-top: 14px; display: flex; flex-direction: column; gap: 4px; }
.sv-deck__centers li { font-family: var(--ff-disp); font-size: .78rem; letter-spacing: .04em; color: var(--neon); }
.sv-deck__centers li b { font-weight: 600; color: var(--fg-dim); margin-right: 8px; letter-spacing: .14em; }
.sv-deck__ig { display: inline-block; margin-top: 14px; font-family: var(--ff-disp); font-size: .72rem; letter-spacing: .14em; color: var(--fg); border-bottom: 1px solid var(--hair); padding-bottom: 2px; transition: border-color .3s, color .3s; }
.sv-deck__ig:hover { color: var(--neon); border-color: var(--neon); }

.sv-deck__strip {
  width: 100%; margin-top: clamp(24px, 5vh, 56px); overflow: hidden;
  cursor: grab;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent);
}
.sv-deck__strip.is-drag { cursor: grabbing; }
.sv-deck__filmstrip {
  display: flex; gap: 12px; padding: 6px 0;
  will-change: transform;
  transition: transform .35s var(--ease);
}
.sv-deck__filmstrip.no-anim { transition: none; }
.sv-thumb {
  flex: 0 0 auto; width: clamp(58px, 7vw, 96px); aspect-ratio: 1/1;
  border: 1px solid var(--hair); overflow: hidden; opacity: .42;
  transform: scale(.86); transform-origin: center bottom;
  transition: opacity .4s var(--ease), transform .4s var(--ease), border-color .4s;
  background: #000;
}
.sv-thumb img { width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.sv-thumb.is-active { opacity: 1; transform: scale(1.18); border-color: var(--neon); }
.sv-deck__hint { width: var(--w); margin: 18px auto 0; font-family: var(--ff-disp); font-size: .62rem; letter-spacing: .34em; color: var(--fg-dim); text-align: center; }

/* =========================================================================
   CH 04 — THE LIVE
   ========================================================================= */
.sv-live { padding: var(--pad) 0; position: relative; }
.sv-live__count { width: var(--w); margin: clamp(40px, 7vh, 80px) auto 0; display: flex; align-items: baseline; gap: 22px; flex-wrap: wrap; }
.sv-live__count-n { font-family: var(--ff-disp); font-weight: 900; font-variant-numeric: tabular-nums; font-size: clamp(5rem, 20vw, 16rem); line-height: .8; color: var(--white); }
body[data-dawn] .sv-live__count-n { color: var(--fg); }
.sv-live__count-l { font-family: var(--ff-disp); font-weight: 500; font-size: clamp(.8rem, 2vw, 1.2rem); letter-spacing: .3em; color: var(--fg-dim); }

.sv-ticket {
  width: var(--w); margin: clamp(40px, 6vh, 70px) auto 0;
  display: grid; grid-template-columns: auto 1fr; align-items: stretch;
  border: 1px solid var(--hair); background: var(--coal);
  position: relative; overflow: hidden;
}
.sv-ticket__stub {
  display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 6px;
  padding: clamp(22px, 4vw, 48px); border-right: 1px dashed var(--hair);
  background: linear-gradient(135deg, rgba(255,79,139,.14), transparent);
}
.sv-ticket__stub-no { font-family: var(--ff-disp); font-weight: 900; font-size: clamp(2.4rem, 6vw, 4rem); color: var(--neon); line-height: .9; }
.sv-ticket__stub-l { font-family: var(--ff-disp); font-size: .6rem; letter-spacing: .3em; color: var(--fg-dim); }
.sv-ticket__body { padding: clamp(22px, 4vw, 48px); }
.sv-ticket__date { font-family: var(--ff-disp); font-weight: 800; font-size: clamp(1.6rem, 4.5vw, 3rem); line-height: 1; }
.sv-ticket__venue { font-family: var(--ff-disp); font-weight: 300; font-size: clamp(1rem, 2.4vw, 1.5rem); margin-top: 10px; letter-spacing: .04em; }
.sv-ticket__tag { font-family: var(--ff-disp); font-size: .66rem; letter-spacing: .3em; color: var(--fg-dim); margin-top: 16px; text-transform: uppercase; }

.sv-live__list { width: var(--w); margin: clamp(36px, 6vh, 60px) auto 0; }
.sv-live__list li { display: grid; grid-template-columns: 90px 1fr; gap: 18px; padding: 18px 0; border-top: 1px solid var(--hair); align-items: baseline; }
.sv-live__list li:last-child { border-bottom: 1px solid var(--hair); }
.sv-live__d { font-family: var(--ff-disp); font-weight: 600; font-variant-numeric: tabular-nums; font-size: 1rem; color: var(--neon); letter-spacing: .04em; }
.sv-live__n { font-family: var(--ff-ui); font-size: .92rem; }
.sv-live__v { font-family: var(--ff-jp); font-size: .8rem; color: var(--fg-dim); margin-top: 4px; }

.sv-marquee { margin-top: clamp(48px, 8vh, 90px); overflow: hidden; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); padding: 16px 0; }
.sv-marquee__track { display: flex; white-space: nowrap; will-change: transform; animation: sv-marquee 34s linear infinite; }
.sv-marquee__track span { font-family: var(--ff-disp); font-weight: 600; font-size: clamp(1rem, 2.6vw, 1.8rem); letter-spacing: .14em; color: var(--neon); padding-right: 1.2em; }
@keyframes sv-marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* =========================================================================
   CH 05 — START HERE  (dawn)
   ========================================================================= */
.sv-start { padding: var(--pad) 0; }
.sv-steps { width: var(--w); margin: clamp(40px, 7vh, 80px) auto 0; display: flex; flex-direction: column; gap: clamp(28px, 5vh, 60px); }
.sv-step { display: grid; grid-template-columns: clamp(60px, 9vw, 130px) 1fr; gap: clamp(18px, 3vw, 40px); align-items: start; border-top: 1px solid var(--hair); padding-top: clamp(20px, 3vh, 36px); }
.sv-step__no { font-family: var(--ff-disp); font-weight: 100; font-size: clamp(3rem, 9vw, 7rem); line-height: .8; color: var(--neon); }
.sv-step__title { font-family: var(--ff-disp); font-weight: 600; font-size: clamp(1.4rem, 3.4vw, 2.4rem); letter-spacing: .02em; }
.sv-step__text { font-family: var(--ff-serif); font-style: italic; font-size: clamp(1.05rem, 2.2vw, 1.5rem); margin-top: 8px; color: var(--fg); }
.sv-step__links { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.sv-step__links a { font-family: var(--ff-disp); font-weight: 400; font-size: clamp(1.1rem, 2.6vw, 1.7rem); display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; transition: color .3s; }
.sv-step__links a:hover { color: var(--neon); }
.sv-step__links a i { font-style: normal; font-family: var(--ff-disp); font-size: .82rem; color: var(--fg-dim); letter-spacing: .06em; }
.sv-btn {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 18px;
  font-family: var(--ff-disp); font-weight: 600; font-size: .9rem; letter-spacing: .14em;
  padding: 12px 24px; border: 1px solid var(--fg); color: var(--fg);
  transition: background-color .35s var(--ease), color .35s, border-color .35s;
}
.sv-btn:hover { background: var(--neon); border-color: var(--neon); color: #fff; }

/* =========================================================================
   EPILOGUE
   ========================================================================= */
.sv-epilogue {
  background: var(--bg); color: var(--fg);
  text-align: center; padding: clamp(80px, 16vh, 180px) clamp(24px, 6vw, 60px);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  transition: background-color .9s var(--ease-soft), color .9s var(--ease-soft);
}
.sv-epilogue__title { font-family: var(--ff-disp); font-weight: 500; font-size: .92rem; letter-spacing: .28em; }
.sv-epilogue__disc { font-family: var(--ff-ui); font-size: .76rem; color: var(--fg-dim); max-width: 56ch; line-height: 1.7; }
.sv-epilogue__disc-jp { font-family: var(--ff-jp); font-size: .74rem; color: var(--fg-dim); max-width: 40ch; }
.sv-epilogue__official { font-family: var(--ff-disp); font-size: .8rem; color: var(--fg-dim); margin-top: 8px; }
.sv-epilogue__official a { border-bottom: 1px solid var(--hair); transition: border-color .3s, color .3s; }
.sv-epilogue__official a:hover { color: var(--neon); border-color: var(--neon); }
.sv-epilogue__mark { font-size: 1.4rem; color: var(--petal); margin-top: 22px; }

/* =========================================================================
   THEATER (YouTube facade)
   ========================================================================= */
.sv-theater {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(7,5,9,.94); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: clamp(20px, 5vw, 64px);
  opacity: 0; transition: opacity .4s var(--ease);
}
.sv-theater:not([hidden]) { display: flex; }
.sv-theater.is-open { opacity: 1; }
.sv-theater__close { position: absolute; top: clamp(16px, 3vw, 34px); right: clamp(16px, 3vw, 34px); font-family: var(--ff-disp); font-weight: 500; font-size: .76rem; letter-spacing: .2em; color: var(--white); }
.sv-theater__frame { width: min(1100px, 92vw); aspect-ratio: 16/9; background: #000; }
.sv-theater__frame iframe { width: 100%; height: 100%; border: 0; }

/* =========================================================================
   RESPONSIVE — mobile (390x844)
   ========================================================================= */
@media (max-width: 860px) {
  .sv-rail { display: none; }
  .sv-doors__row { grid-template-columns: 1fr; }
  .sv-strip { height: auto; margin-top: clamp(40px, 8vh, 80px); }
  .sv-strip__sticky { position: static; height: auto; display: block; padding: 0 0 12px; }
  .sv-strip__track { overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 5vw 18px; -webkit-overflow-scrolling: touch; transform: none !important; }
  .sv-single { scroll-snap-align: start; width: 78vw; }
  .sv-strip__ruler { display: none; }
  .sv-deck__stage { flex-direction: column; align-items: center; text-align: center; min-height: 0; }
  .sv-deck__photo-wrap { width: min(78vw, 360px); }
  .sv-deck__bigname { position: static; white-space: normal; font-size: clamp(2rem, 12vw, 3.4rem); text-align: center; margin-top: 12px; }
  .sv-deck__meta { padding-bottom: 0; }
  .sv-deck__centers { align-items: center; }
  .sv-deck__strip { overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; cursor: auto; }
  .sv-deck__filmstrip { transform: none !important; transition: none; padding: 6px 40vw; }
  .sv-thumb { scroll-snap-align: center; }
  .sv-ticket { grid-template-columns: 1fr; }
  .sv-ticket__stub { border-right: none; border-bottom: 1px dashed var(--hair); flex-direction: row; gap: 14px; }
  .sv-live__list li { grid-template-columns: 1fr; gap: 6px; }
  .sv-step { grid-template-columns: 1fr; gap: 10px; }
  .sv-menu-btn { font-size: .68rem; }
}

/* =========================================================================
   REDUCED MOTION  — stop all motion, show static
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .sv-mask__in { transform: none !important; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .sv-origin { height: auto !important; }
  .sv-origin__sticky { position: static; height: auto; padding: var(--pad) 0; }
  .sv-origin__year { position: static; transform: none; opacity: .14; display: block; text-align: center; }
  .sv-origin__stage { display: block; }
  .sv-origin__act { opacity: 1 !important; transform: none !important; max-width: none; margin: 0 auto 60px; pointer-events: auto; }
  .sv-origin__bg { display: none; }
  .sv-strip { height: auto !important; }
  .sv-strip__sticky { position: static; height: auto; display: block; }
  .sv-strip__track { overflow-x: auto; transform: none !important; }
  .sv-deck__photo { transition: none; }
  .sv-marquee__track { animation: none; }
  .sv-hero__cue i { animation: none; }
  .sv-loader { display: none; }
}