/* =========================================================
   TMNETWORK『QUANTUM』特設サイト
   Palette sampled from the QUANTUM jacket artwork
   ========================================================= */
:root {
  --red: #e60012;
  --green: #00a33e;
  --cyan: #00a7e8;
  --yellow: #fff100;
  --magenta: #e4007f;
  --violet: #4b4fa3;
  --orange: #f39800;
  --black: #0b0b0c;
  --ink: #141416;
  --white: #ffffff;
  --gray: #9a9aa2;
  --line: rgba(255, 255, 255, .14);

  --grad-spectrum: linear-gradient(90deg, var(--cyan), var(--green), var(--yellow), var(--orange), var(--red), var(--magenta), var(--violet));
  --grad-bar-a: linear-gradient(180deg, #000 0%, #1e3a46 45%, #0a7fae 100%);
  --grad-bar-b: linear-gradient(180deg, #000 0%, #6b2a1c 30%, var(--red) 55%, var(--yellow) 75%, #0a6b8f 100%);

  --font-en: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --font-ja: "Noto Sans JP", sans-serif;
  --header-h: 64px;
  --gutter: clamp(16px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-ja);
  font-size: 15px;
  line-height: 1.9;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p, dl, dd { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }
.container--narrow { max-width: 860px; }
.sp { display: none; }
@media (max-width: 767px) { .sp { display: inline; } }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--gutter);
  transition: background .4s, backdrop-filter .4s;
}
.header::before { content: ""; position: absolute; inset: 0 0 -24px 0; z-index: -1; background: linear-gradient(rgba(0,0,0,.38), transparent); transition: opacity .4s; pointer-events: none; }
.header.is-scrolled::before { opacity: 0; }
.header.is-scrolled { background: rgba(11, 11, 12, .82); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.header__logo { font-family: var(--font-en); font-weight: 900; font-size: 20px; letter-spacing: -.01em; }
.nav ul { display: flex; gap: 28px; }
.nav a {
  font-family: var(--font-en); font-weight: 600; font-size: 12px; letter-spacing: .12em;
  position: relative; padding: 4px 0;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: var(--grad-spectrum); transform: scaleX(0); transform-origin: left; transition: transform .35s;
}
.nav a:hover::after { transform: scaleX(1); }
.menu-btn { display: none; width: 40px; height: 40px; position: relative; }
.menu-btn span { position: absolute; left: 8px; right: 8px; height: 2px; background: #fff; transition: transform .3s, top .3s; }
.menu-btn span:nth-child(1) { top: 15px; }
.menu-btn span:nth-child(2) { top: 23px; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { top: 19px; transform: rotate(-45deg); }

@media (max-width: 1023px) {
  .menu-btn { display: block; z-index: 2; }
  .nav {
    position: fixed; inset: 0; background: rgba(11, 11, 12, .97);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: opacity .35s, visibility .35s;
  }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav ul { flex-direction: column; align-items: center; gap: 22px; }
  .nav a { font-size: 22px; font-weight: 800; letter-spacing: .04em; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .6em;
  min-height: 52px; padding: 0 32px;
  font-family: var(--font-en); font-weight: 800; font-size: 13px; letter-spacing: .14em;
  border-radius: 999px; transition: transform .25s, background .25s, color .25s, box-shadow .25s;
}
.btn::after { content: "→"; font-weight: 600; transition: transform .25s; }
.btn:hover::after { transform: translateX(4px); }
.btn--white { background: #fff; color: var(--black); }
.btn--white:hover { box-shadow: 0 0 0 4px rgba(255,255,255,.25); }
.btn--ghost { border: 1.5px solid rgba(255,255,255,.7); }
.btn--ghost:hover { background: #fff; color: var(--black); }
.btn--color { background: linear-gradient(90deg, var(--red), var(--magenta), var(--violet), var(--magenta), var(--red)); background-size: 200% 100%; color: #fff; animation: shift 6s linear infinite; }
.btn--color:hover { transform: translateY(-2px); }
@keyframes shift { to { background-position: 200% 0; } }

/* ---------- Hero ---------- */
/* FV visual: CD 通常盤ジャケット */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center;
  gap: clamp(32px, 4vw, 72px);
  padding: calc(var(--header-h) + 32px) var(--gutter) 72px;
  overflow: hidden; isolation: isolate; background: var(--black);
}
.hero__bg {
  position: absolute; inset: -60px; z-index: -2;
  background: url("../img/jkt_regular.jpg") center / cover no-repeat;
  filter: blur(48px) saturate(1.2);
  transform: scale(1.1);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(90deg, rgba(8,8,10,.82) 0%, rgba(8,8,10,.6) 45%, rgba(8,8,10,.25) 100%);
}
.hero__inner { position: relative; z-index: 1; min-width: 0; }
.hero__visual { position: relative; z-index: 1; display: grid; place-items: center; }
/* 大きな回転する Q（ジャケットの背面） */
.q-mark {
  position: absolute; left: 72%; top: 62%; z-index: -1;
  width: 175%; aspect-ratio: 1 / 1; margin: -87.5% 0 0 -87.5%;
  opacity: .92; overflow: visible; pointer-events: none;
  animation: qSpin 40s linear infinite;
}
@keyframes qSpin { to { transform: rotate(360deg); } }
.hero__jacket {
  margin: 0; position: relative; z-index: 1;
  width: min(44vw, calc(100svh - var(--header-h) - 120px), 720px);
  box-shadow: 0 40px 90px rgba(0,0,0,.55);
  animation: jktIn 1.4s cubic-bezier(.2,.7,.1,1) backwards;
}
.hero__jacket img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
@keyframes jktIn { from { opacity: 0; transform: translateY(24px) scale(.97); } }

.hero__label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-weight: 800; font-size: 13px; letter-spacing: .3em;
  margin-bottom: 18px;
}
.hero__label .dot { width: 10px; height: 10px; border-radius: 50%; background: #fff; animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.hero__title { display: flex; flex-direction: column; line-height: .9; }
.hero__artist { font-family: var(--font-en); font-weight: 900; font-size: clamp(24px, 3.2vw, 48px); letter-spacing: -.02em; margin-bottom: .2em; }
.hero__album { font-family: var(--font-en); font-weight: 900; font-size: clamp(56px, 9vw, 150px); letter-spacing: -.045em; }
.hero__yomi { font-weight: 700; font-size: 13px; letter-spacing: .5em; margin: 14px 0 26px; }
.hero__date { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 10px; }
.hero__date .num { font-family: var(--font-en); font-weight: 800; font-size: clamp(28px, 3.2vw, 44px); letter-spacing: -.01em; line-height: 1; }
.hero__date .wk { font-family: var(--font-en); font-weight: 700; font-size: 14px; letter-spacing: .1em; }
.hero__date .badge {
  font-family: var(--font-en); font-weight: 900; font-size: 12px; letter-spacing: .18em;
  background: #fff; color: var(--black); padding: 7px 14px; border-radius: 2px;
}
.hero__sub { font-size: 14px; font-weight: 700; margin-bottom: 30px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; align-items: start; gap: 32px; padding-top: calc(var(--header-h) + 8px); padding-bottom: 56px; }
  .hero__visual { order: -1; justify-self: center; width: 100%; max-width: 560px; margin: 48px 0 72px; }
  .hero__jacket { width: 82%; }
  .q-mark { left: 50%; top: 50%; width: 118%; margin: -59% 0 0 -59%; }
  .hero::after { background: linear-gradient(180deg, rgba(8,8,10,.35) 0%, rgba(8,8,10,.75) 45%, rgba(8,8,10,.88) 100%); }
  .hero__cta .btn { flex: 1 1 auto; }
}

/* ---------- Intro ---------- */
.intro { position: relative; padding: clamp(96px, 14vw, 180px) 0; text-align: center; }
.intro::before {
  content: ""; position: absolute; left: 50%; top: 0; width: 1px; height: clamp(48px, 7vw, 96px);
  background: linear-gradient(var(--green), transparent);
}
.intro__body { max-width: 760px; margin: 0 auto; }
.intro__body p { font-size: clamp(14px, 1.5vw, 16px); line-height: 2.2; }
.intro__body p + p { margin-top: 1em; }
@media (max-width: 767px) { .intro__body { text-align: left; } }

/* ---------- Artist visual ---------- */
.visual { position: relative; }
.visual img { width: 100%; }
.visual::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 20%;
  background: linear-gradient(transparent, var(--black));
}

/* ---------- Section common ---------- */
.section { padding: clamp(88px, 12vw, 160px) 0; position: relative; }
.sec-head { margin-bottom: clamp(40px, 6vw, 72px); }
.sec-head__en {
  font-family: var(--font-en); font-weight: 900; font-size: clamp(44px, 8vw, 104px);
  letter-spacing: -.04em; line-height: .95;
}
.sec-head__ja {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px;
  font-weight: 700; font-size: 14px; letter-spacing: .12em; margin-top: 14px;
}
.sec-head__ja::before { content: ""; width: 48px; height: 4px; background: var(--grad-spectrum); }

.spec { display: grid; gap: 0; border-top: 1px solid var(--line); margin: 20px 0 28px; }
.spec > div { display: grid; grid-template-columns: 6em 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.spec dt { color: var(--gray); font-weight: 500; }
.spec dd { font-weight: 700; }

/* ---------- Release ---------- */
.release { background: linear-gradient(180deg, var(--black) 0%, #0f1a14 100%); }
.release__meta { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 16px; padding-bottom: 32px; margin-bottom: 48px; border-bottom: 1px solid var(--line); }
.release__title { font-family: var(--font-en); font-weight: 800; font-size: 16px; letter-spacing: .06em; line-height: 1.5; }
.release__title strong { font-family: var(--font-ja); font-weight: 900; font-size: clamp(30px, 4vw, 48px); letter-spacing: .02em; }
.release__title span { font-family: var(--font-ja); font-size: 13px; font-weight: 500; margin-left: .5em; color: var(--gray); }
.release__date { font-weight: 900; font-size: clamp(16px, 2vw, 22px); }

.formats { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); }
.format { display: flex; flex-direction: column; }
.format__img {
  position: relative; aspect-ratio: 1 / 1; background: #1a1a1c; overflow: hidden; margin-bottom: 28px;
  display: flex; align-items: center; justify-content: center;
}
.format__img img { height: 100%; width: auto; object-fit: contain; transition: transform .6s cubic-bezier(.2,.7,.1,1); box-shadow: 0 30px 60px rgba(0,0,0,.5); }
.format__img--square img { width: 100%; height: 100%; object-fit: cover; }
.format:hover .format__img img { transform: scale(1.03); }
.format__tag { display: inline-block; font-weight: 900; font-size: 13px; letter-spacing: .1em; padding: 6px 14px; margin-bottom: 14px; }
.format__tag--limited { background: var(--red); }
.format__tag--regular { background: var(--green); }
.format__name { font-weight: 900; font-size: clamp(17px, 1.8vw, 21px); line-height: 1.6; }
.format__name small { display: block; font-size: 13px; font-weight: 500; color: var(--gray); }
.release__buy { margin-top: clamp(48px, 6vw, 72px); text-align: center; }
.btn--lg { min-height: 64px; min-width: min(100%, 420px); font-size: 15px; }
.release__buy-note { margin-top: 14px; font-size: 13px; color: var(--gray); }
.label-info { margin-top: 56px; display: grid; gap: 6px; font-size: 13px; color: var(--gray); }
.label-info > div { display: flex; gap: 1em; }
.label-info dd { color: #d8d8dc; }
@media (max-width: 767px) {
  .formats { grid-template-columns: 1fr; gap: 64px; }
  .release__buy .btn { width: 100%; }
}

/* ---------- Tracklist ---------- */
.tracklist { background: #0e0e10; overflow: hidden; }
.tracklist::before {
  content: "Q"; position: absolute; right: -4vw; top: 4%;
  font-family: var(--font-en); font-weight: 900; font-size: 48vw; line-height: 1; color: transparent;
  -webkit-text-stroke: 2px rgba(255,255,255,.06); pointer-events: none;
}
.sec-head .total { font-family: var(--font-en); font-weight: 600; color: var(--gray); letter-spacing: .06em; }
.tracks { position: relative; border-top: 1px solid var(--line); }
.track {
  display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 16px;
  padding: 22px 8px; border-bottom: 1px solid var(--line);
  transition: background .3s, padding .3s;
}
.track:hover { background: rgba(255,255,255,.04); padding-left: 16px; }
.track__no { font-family: var(--font-en); font-weight: 800; font-size: 14px; color: var(--gray); }
.track__title { font-family: var(--font-en), var(--font-ja); font-weight: 800; font-size: clamp(18px, 2.2vw, 26px); letter-spacing: -.005em; line-height: 1.35; }
.track__title em { font-style: normal; font-weight: 600; font-size: .7em; color: #c9c9cf; }

.suite { position: relative; padding: 24px 0 0 20px; border-bottom: 1px solid var(--line); }
.suite::before { content: ""; position: absolute; left: 0; top: 24px; bottom: 24px; width: 4px; background: var(--grad-spectrum); background: linear-gradient(180deg, var(--cyan), var(--green), var(--yellow), var(--red)); }
.suite__label { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px; font-weight: 700; font-size: 13px; letter-spacing: .1em; padding-left: 8px; }
.suite__label span { font-family: var(--font-en); font-weight: 900; font-size: 12px; letter-spacing: .3em; color: var(--green); }
.suite .track:last-child { border-bottom: 0; }
@media (max-width: 767px) {
  .track { grid-template-columns: 36px 1fr; gap: 10px; padding: 18px 4px; }
  .track:hover { padding-left: 4px; }
  .suite { padding-left: 14px; }
}

/* ---------- Blu-ray ---------- */
.bluray { background: radial-gradient(120% 80% at 0% 0%, rgba(0,167,232,.18), transparent 60%), radial-gradient(90% 70% at 100% 100%, rgba(230,0,18,.16), transparent 60%), var(--black); }
.bluray__grid { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
.bluray__img { position: sticky; top: calc(var(--header-h) + 24px); }
.bluray__img img { width: 100%; box-shadow: 0 40px 80px rgba(0,0,0,.6); }
.bluray__title { font-family: var(--font-en); font-weight: 900; font-size: clamp(24px, 3vw, 38px); letter-spacing: -.02em; line-height: 1.15; }
.bluray__title span { color: #fff; }
.bluray__desc { margin-top: 16px; font-weight: 500; }
.setlist__head { font-weight: 900; font-size: 16px; letter-spacing: .1em; margin: 56px 0 16px; }
.setlist { counter-reset: s; columns: 2; column-gap: 32px; border-top: 1px solid var(--line); padding-top: 8px; }
.setlist li { counter-increment: s; break-inside: avoid; display: flex; gap: 14px; padding: 9px 0; font-family: var(--font-en), var(--font-ja); font-weight: 600; font-size: 14px; line-height: 1.5; }
.setlist li::before { content: counter(s, decimal-leading-zero); font-weight: 800; font-size: 12px; color: var(--gray); min-width: 1.8em; padding-top: 2px; }
@media (max-width: 767px) {
  .bluray__grid { grid-template-columns: 1fr; }
  .bluray__img { position: static; max-width: 420px; margin: 0 auto; }
  .bluray .btn { width: 100%; }
  .setlist { columns: 1; }
}

/* ---------- Footer ---------- */
.footer { position: relative; text-align: center; padding: 96px var(--gutter) 40px; background: var(--black); overflow: hidden; }
.footer__bars { position: absolute; left: 0; right: 0; top: 0; height: 6px; background: var(--grad-spectrum); }
.footer__logo { font-family: var(--font-en); font-weight: 900; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.02em; line-height: 1; }
.footer__album { font-family: var(--font-en); font-weight: 900; font-size: clamp(56px, 12vw, 160px); letter-spacing: -.05em; line-height: 1; margin: 8px 0 40px; color: #fff; }
.footer__copy { font-family: var(--font-en); font-size: 11px; color: var(--gray); letter-spacing: .08em; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 1s cubic-bezier(.2,.7,.1,1), transform 1s cubic-bezier(.2,.7,.1,1); }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}