/* ==========================================================================
   POPS KAWAKAMI — dark-luxe, neon Yamaguchi retail
   Deep violet stage, magenta / teal / gold accents, concert-ticket hero,
   track-list gallery. Not a 50/50 split, not a three-card row.
   ========================================================================== */

:root {
  --bg: #14061f;
  --bg-alt: #1d0a2e;
  --bg-deep: #0b0314;
  --ink: #f8ecff;
  --ink-soft: #c9aedb;
  --ink-invert: #14061f;
  --accent: #ff3dad;
  --accent-soft: #3c1238;
  --line: #4a1a66;
  --gold: #efc14b;
  --teal: #2ee6d6;
  --violet: #8b4dff;
  --glow-pink: color-mix(in srgb, var(--accent) 42%, transparent);
  --glow-teal: color-mix(in srgb, var(--teal) 38%, transparent);
  --glow-gold: color-mix(in srgb, var(--gold) 35%, transparent);

  --font-display: 'M PLUS 1', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-body: 'M PLUS 1', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --tracking-display: -0.03em;
  --radius: 6px;
  --radius-lg: 18px;
  --shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent),
    0 24px 60px color-mix(in srgb, var(--bg-deep) 65%, transparent);
  --container: 1180px;
}

body { background: var(--bg); color: var(--ink); }

.site-header {
  background: color-mix(in srgb, var(--bg-deep) 78%, transparent);
  color: var(--ink);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  letter-spacing: 0.04em;
}
.brand-mark {
  display: grid;
  color: var(--bg-alt);
  filter: drop-shadow(0 0 10px var(--glow-pink));
  flex-shrink: 0;
}
.brand-mark__plate { fill: var(--bg-alt); stroke: var(--gold); stroke-width: 1.5; }
.brand-type {
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.16em;
}
.brand-type__kana {
  color: var(--teal);
  font-size: 0.62rem;
  letter-spacing: 0.28em;
}

.nav a { opacity: 0.8; }
.nav a:hover { opacity: 1; color: var(--gold); }

.btn--primary {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 0 24px var(--glow-pink);
}
.btn--primary:hover {
  background: var(--gold);
  color: var(--bg-deep);
  box-shadow: 0 0 28px var(--glow-gold);
}
.btn--ghost {
  border-color: var(--teal);
  color: var(--ink);
}
.btn--ghost:hover {
  background: var(--teal);
  color: var(--bg-deep);
  border-color: var(--teal);
}

.section--alt { background: var(--bg-alt); }
.section--deep { background: var(--bg-deep); color: var(--ink); }
.section--deep .lede,
.section--deep .muted { color: var(--ink-soft); }
.eyebrow { color: var(--gold); }
.lede { color: var(--ink-soft); }

.field input,
.field textarea,
.field select {
  background: var(--bg-deep);
  border-color: var(--line);
  color: var(--ink);
  border-radius: var(--radius);
}
.field select {
  padding: 0.85em 1em;
  border: 1px solid var(--line);
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--gold) 50%),
    linear-gradient(135deg, var(--gold) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.form-status[data-state='ok'] { color: var(--teal); }

.site-footer { border-top-color: var(--line); color: var(--ink); }
.site-footer__bottom { border-top-color: var(--line); color: var(--ink-soft); }

section[id] { scroll-margin-top: 5.5rem; }

.section__head {
  max-width: 40rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

/* --- HERO: full stage + ticket ticker, vertical spine --- */
.hero { padding: 0; position: relative; }
.hero__stage {
  position: relative;
  min-height: min(92svh, 920px);
  display: grid;
  align-items: end;
  overflow: hidden;
}
.hero__photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero__stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--bg-deep) 88%, transparent) 0%,
      color-mix(in srgb, var(--bg-deep) 35%, transparent) 58%,
      color-mix(in srgb, var(--accent) 18%, transparent) 100%),
    linear-gradient(180deg, transparent 40%, var(--bg-deep) 100%);
  pointer-events: none;
}
.hero__stage::after {
  content: "";
  position: absolute;
  inset: 1.1rem;
  z-index: 2;
  border: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
  border-radius: var(--radius-lg);
  pointer-events: none;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
.hero__spine {
  position: absolute;
  top: 18%;
  right: 1.6rem;
  z-index: 3;
  writing-mode: vertical-rl;
  letter-spacing: 0.28em;
  font-size: var(--step--1);
  color: var(--teal);
  text-transform: uppercase;
  font-weight: 600;
}
.hero__copy {
  position: relative;
  z-index: 3;
  width: min(100% - 2 * var(--gap), var(--container));
  margin: 0 auto;
  padding: 0 0 clamp(2.5rem, 6vw, 4.5rem);
  max-width: 38rem;
  justify-self: start;
  margin-inline: auto 0;
  margin-left: max(var(--gap), calc((100% - var(--container)) / 2));
}
.hero h1 {
  margin: 0.4rem 0 1rem;
  font-weight: 800;
  text-shadow: 0 0 40px var(--glow-pink);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

.hero__ticker {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  list-style: none;
  padding: 0.9rem var(--gap);
  margin: 0;
  background: var(--bg-deep);
  border-block: 1px solid var(--line);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  scrollbar-width: none;
}
.hero__ticker::-webkit-scrollbar { display: none; }
.hero__ticker li { white-space: nowrap; }
.hero__ticker li + li::before {
  content: "✦ ";
  color: var(--accent);
  margin-right: 1.5rem;
}

/* --- FLOORS: sticky track rail + 8 album covers --- */
.floors { background: var(--bg); }
.floors__layout {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.floors__rail { max-width: 28rem; }
.floors__grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}
.floor-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  min-height: 220px;
  isolation: isolate;
  border: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}
.floor-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  z-index: 0;
  transform: scale(1.04);
  transition: transform 0.6s var(--ease);
}
.floor-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, transparent 20%, color-mix(in srgb, var(--bg-deep) 92%, transparent) 100%);
}
.floor-card__meta {
  position: relative;
  z-index: 2;
  padding: 5.5rem 1.1rem 1.1rem;
}
.floor-card__meta span {
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  color: var(--teal);
  font-weight: 700;
}
.floor-card__meta h3 { font-size: var(--step-1); margin: 0.2rem 0 0.35rem; }
.floor-card__meta p { font-size: var(--step--1); color: var(--ink-soft); }
.floor-card:hover,
.floor-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 16px 40px var(--glow-pink);
  transform: translateY(-3px);
}
.floor-card:hover img,
.floor-card:focus-within img { transform: scale(1.1); }

@media (min-width: 700px) {
  .floors__grid { grid-template-columns: repeat(2, 1fr); }
  .floor-card:nth-child(1) { grid-column: span 2; min-height: 280px; }
}
@media (min-width: 1080px) {
  .floors__layout {
    grid-template-columns: minmax(15rem, 20rem) 1fr;
    align-items: start;
  }
  .floors__rail {
    position: sticky;
    top: 6rem;
    max-width: none;
  }
  .floors__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .floor-card:nth-child(1) { grid-column: span 2; grid-row: span 2; min-height: 420px; }
  .floor-card:nth-child(2),
  .floor-card:nth-child(3) { min-height: 200px; }
  .floor-card:nth-child(n+4) { min-height: 240px; }
}

/* --- ABOUT: photo in a gold ticket frame, facts strip --- */
.about__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.about__frame {
  margin: 0;
  position: relative;
  padding: 0.7rem;
  border: 1px solid var(--gold);
  border-radius: var(--radius-lg);
  background: var(--bg-deep);
  box-shadow: 0 0 40px var(--glow-gold);
}
.about__frame img {
  width: 100%;
  border-radius: calc(var(--radius-lg) - 4px);
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.about__frame figcaption {
  position: absolute;
  left: 1.4rem;
  bottom: 1.4rem;
  padding: 0.35rem 0.7rem;
  background: var(--bg-deep);
  color: var(--gold);
  font-size: var(--step--1);
  letter-spacing: 0.08em;
}
.about__copy h2 { margin-bottom: 1rem; }
.about__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 1.25rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.about__facts dt {
  font-size: var(--step--1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}
.about__facts dd {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 800;
  color: var(--gold);
}
@media (min-width: 900px) {
  .about__grid { grid-template-columns: 0.9fr 1.1fr; }
}

/* --- PULSE: interactive details cards --- */
.pulse { background: var(--bg-deep); }
.pulse__grid {
  display: grid;
  gap: 1rem;
}
.pulse-card {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem 0.4rem;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.pulse-card[open] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 36px var(--glow-pink);
}
.pulse-card:nth-child(2)[open] {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), 0 0 36px var(--glow-gold);
}
.pulse-card:nth-child(3)[open] {
  border-color: var(--teal);
  box-shadow: 0 0 0 1px var(--teal), 0 0 36px var(--glow-teal);
}
.pulse-card:nth-child(4)[open] {
  border-color: var(--violet);
  box-shadow: 0 0 0 1px var(--violet), 0 0 36px color-mix(in srgb, var(--violet) 40%, transparent);
}
.pulse-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding-bottom: 0.75rem;
}
.pulse-card summary::-webkit-details-marker { display: none; }
.pulse-card__n {
  font-weight: 800;
  color: var(--gold);
  letter-spacing: 0.08em;
  min-width: 2ch;
}
.pulse-card__title { font-weight: 800; font-size: var(--step-1); }
.pulse-card p {
  color: var(--ink-soft);
  padding: 0 0 1rem 2.7rem;
  max-width: 58ch;
}
@media (min-width: 800px) {
  .pulse__grid { grid-template-columns: 1fr 1fr; }
}

/* --- SERVICES: numbered stacked rows, not cards --- */
.service-list {
  list-style: none;
  counter-reset: svc;
  display: grid;
  gap: 0;
}
.service-row {
  counter-increment: svc;
  display: grid;
  gap: 0.75rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: 1fr;
}
.service-row::before {
  content: counter(svc, decimal-leading-zero);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.12em;
  font-size: var(--step-1);
}
.service-row h3 { font-size: var(--step-2); }
.service-row p { color: var(--ink-soft); max-width: 68ch; }
@media (min-width: 800px) {
  .service-row {
    grid-template-columns: 4.5rem 0.9fr 1.1fr;
    align-items: start;
    column-gap: 1.5rem;
  }
  .service-row h3 { grid-column: 2; grid-row: 1 / span 2; padding-top: 0.15rem; }
  .service-row p { grid-column: 3; }
  .service-row p + p { margin-top: 0; }
}

/* --- BENCH: lettered timeline --- */
.bench { background: var(--bg); }
.bench-steps {
  list-style: none;
  display: grid;
  gap: 1rem;
  position: relative;
}
.bench-steps li {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.3rem 1.4rem;
  position: relative;
}
.bench-steps li span {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 800;
  margin-bottom: 0.8rem;
  box-shadow: 0 0 18px var(--glow-pink);
}
.bench-steps li:nth-child(2) span { background: var(--gold); box-shadow: 0 0 18px var(--glow-gold); }
.bench-steps li:nth-child(3) span { background: var(--teal); box-shadow: 0 0 18px var(--glow-teal); }
.bench-steps li:nth-child(4) span { background: var(--violet); color: var(--ink); box-shadow: 0 0 18px color-mix(in srgb, var(--violet) 45%, transparent); }
.bench-steps h3 { font-size: var(--step-1); margin-bottom: 0.4rem; }
.bench-steps p { color: var(--ink-soft); font-size: var(--step--1); }
@media (min-width: 900px) {
  .bench-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .bench-steps li {
    border-radius: 0;
    border-left: none;
  }
  .bench-steps li:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    border-left: 1px solid var(--line);
  }
  .bench-steps li:last-child { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; }
}

/* --- SEAL: two diploma panels --- */
.seal__grid {
  display: grid;
  gap: 1.25rem;
}
.seal-panel {
  padding: clamp(1.5rem, 3vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg);
  box-shadow: inset 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent);
}
.seal-panel--gold {
  box-shadow: inset 0 0 0 6px color-mix(in srgb, var(--gold) 28%, transparent);
}
.seal-panel h2 { margin: 0.35rem 0 1rem; }
.seal-panel p { color: var(--ink-soft); max-width: 54ch; }
@media (min-width: 800px) {
  .seal__grid { grid-template-columns: 1fr 1fr; }
}

/* --- FAQ --- */
.faq { background: var(--bg); }
.faq__layout {
  display: grid;
  gap: 1.5rem;
}
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  color: var(--accent);
  font-weight: 800;
}
.faq-item[open] summary::after { content: "–"; color: var(--teal); }
.faq-item p {
  color: var(--ink-soft);
  margin-top: 0.6rem;
  max-width: 62ch;
}
@media (min-width: 800px) {
  .faq__layout { grid-template-columns: 16rem 1fr; align-items: start; }
}

/* --- CONTACT --- */
.contact { background: var(--bg-alt); }
.contact__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.contact__card {
  font-style: normal;
  margin-top: 1.5rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--gold);
  border-radius: var(--radius-lg);
  background: var(--bg-deep);
  box-shadow: 0 0 32px var(--glow-gold);
}
.contact__card a { color: var(--teal); }
.contact-form {
  display: grid;
  gap: 1rem;
  padding: clamp(1.2rem, 3vw, 2rem);
  background: var(--bg-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 40px var(--glow-pink);
}
.contact-form__row {
  display: grid;
  gap: 1rem;
}
.choice {
  border: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}
.choice legend {
  font-size: var(--step--1);
  font-weight: 600;
  margin-bottom: 0.35rem;
  width: 100%;
}
.choice label { display: inline-flex; align-items: center; gap: 0.4rem; }
.choice input { accent-color: var(--accent); }
@media (min-width: 700px) {
  .contact-form__row { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 960px) {
  .contact__grid { grid-template-columns: 0.85fr 1.15fr; align-items: start; }
}

/* --- FOOTER --- */
.footer__grid {
  display: grid;
  gap: 1.5rem;
}
.footer__brand { text-decoration: none; margin-bottom: 0.75rem; }
.footer__grid nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}
.footer__grid nav a { text-decoration: none; color: var(--ink-soft); }
.footer__grid nav a:hover { color: var(--gold); }
.footer__grid > .site-footer__bottom {
  grid-column: 1 / -1;
}
@media (min-width: 800px) {
  .footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    align-items: start;
  }
}

@media (max-width: 699px) {
  .hero__spine { display: none; }
  .hero__stage::after { inset: 0.65rem; }
  .pulse-card p { padding-left: 0; }
}