:root {
  --main: #fff;
  --sub: #18BC9C;
  --accent: #18c3ec;
  --bg: #000;
  --font-jp: '游明朝', 'Yu Mincho', 'YuMincho', 'Hiragino Mincho ProN', 'Noto Serif JP', serif;
  --font-en: 'Playfair Display', 'Georgia', serif;
}

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

html {
  scroll-behavior: smooth;
  max-width: 100%;
  overflow-x: clip;
}

body {
  background: var(--bg);
  color: var(--main);
  font-family: var(--font-jp);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-shadow: 0 0 1px rgba(255, 255, 255, .18);
  max-width: 100%;
  overflow-x: clip;
}

img { max-width: 100%; height: auto; display: block; }

.hero {
  position: sticky;
  top: 0;
  z-index: 0;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #fff;
}

main {
  position: relative;
  z-index: 1;
  background: #000;
}

.watermark {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: url('../img/logo-50th.svg') center / min(520px, 72vw) no-repeat;
  filter: invert(1);
  opacity: .045;
  transition: opacity .8s ease;
}

.watermark.is-hidden {
  opacity: 0;
}

.hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 16px 24px;
  transform: translateY(-4svh);
}

.hero__logo {
  display: block;
  width: min(860px, 92vw);
  height: auto;
  margin: 0 auto;
  opacity: 0;
  animation: fadeUp 1.4s ease .3s forwards;
}

.hero__catch {
  margin-top: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: clamp(23px, 2.8vw, 30px);
  font-weight: 600;
  letter-spacing: .42em;
  text-indent: .42em;
  color: #231815;
  opacity: 0;
  animation: fadeUp 1.4s ease .9s forwards;
}

.hero__catch::before,
.hero__catch::after {
  content: '';
  width: 72px;
  height: 1px;
  background: #231815;
}

@media (max-width: 767px) {
  .hero {
    min-height: auto;
    align-items: flex-start;
  }

  .hero__inner {
    transform: none;
    padding: 16svh 24px 16svh;
  }

  .hero__logo {
    width: min(420px, 88vw);
  }

  .hero__catch {
    margin-top: 40px;
    gap: 16px;
  }

  .hero__catch::before,
  .hero__catch::after {
    width: 44px;
  }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.intro {
  position: relative;
  padding: 120px 24px 120px;
  text-align: center;
  background: transparent;
}

.intro > * {
  max-width: 720px;
  margin-inline: auto;
}

.intro__eyebrow {
  font-family: var(--font-en);
  font-size: clamp(11px, 1.6vw, 13px);
  letter-spacing: .35em;
  color: rgba(255,255,255,.8);
}

.intro__title {
  margin-top: 18px;
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 700;
  letter-spacing: .1em;
}

.intro__text {
  margin-top: 40px;
  max-width: 640px;
  text-align: left;
  color: rgba(255,255,255,.94);
}

.intro__text + .intro__text { margin-top: 1.6em; }

.block {
  position: relative;
  text-align: center;
  padding: 96px 24px;
  background: transparent;
}

.block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .55) 50%, transparent);
}

.block:nth-of-type(odd) {
  background: rgba(255, 255, 255, .085);
}

.block__title {
  margin-top: 20px;
  font-size: clamp(26px, 4.2vw, 36px);
  font-weight: 700;
  letter-spacing: .1em;
}

.block__lead {
  margin-top: 18px;
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: .25em;
  color: rgba(255,255,255,.72);
}

.block__text {
  margin: 24px auto 0;
  max-width: 44em;
  color: rgba(255,255,255,.92);
  word-break: keep-all;
  overflow-wrap: normal;
}

.info-table {
  margin: 48px auto 0;
  max-width: 640px;
  text-align: left;
  border-top: 1px solid rgba(255,255,255,.35);
}

.info-table dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 26px 8px;
  border-bottom: 1px solid rgba(255,255,255,.35);
}

.info-table dt {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: .25em;
  color: var(--accent);
}

.info-table dd {
  font-size: 17px;
  letter-spacing: .04em;
  color: rgba(255,255,255,.9);
}

.info-table dd small {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .05em;
  color: rgba(255,255,255,.78);
}

.info-table dd a {
  color: var(--accent);
  letter-spacing: 0;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.info-table dd a:hover {
  border-bottom-color: transparent;
}

@media (min-width: 640px) {
  .info-table dl {
    grid-template-columns: 160px 1fr;
    align-items: baseline;
  }
}

.artist-block {
  padding-top: 104px;
  padding-bottom: 112px;
}

.artist-list {
  margin: 56px auto 0;
  max-width: 760px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 24px;
  text-align: left;
}

.artist-list__item {
  display: block;
  text-align: left;
  color: inherit;
  text-decoration: none;
}

a.artist-list__item {
  transition: opacity .3s ease;
}

a.artist-list__item:hover {
  opacity: .82;
}

a.artist-list__item:hover .artist-list__frame {
  border-color: var(--accent);
}

.artist-list__frame {
  position: relative;
  aspect-ratio: 3 / 2;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .38);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .4);
  background: #000;
  transition: border-color .3s ease;
}

.artist-list__frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.artist-list__name {
  margin-top: 16px;
  text-align: left;
  font-size: clamp(16px, 2.2vw, 19px);
  letter-spacing: .12em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.artist-list__link-icon {
  flex: none;
  width: 14px;
  height: 14px;
  color: var(--accent);
}

.artist-list__name small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--accent);
}

.artist-list__frame--more {
  border-color: rgba(255, 255, 255, .38);
  background: rgba(255, 255, 255, .05);
}

.artist-list__more-text {
  font-family: var(--font-en);
  font-size: 15px;
  letter-spacing: .3em;
  color: #fff;
}

@media (max-width: 767px) {
  .artist-list__more-text {
    font-size: 12px;
    letter-spacing: .25em;
  }
}

.artist-note {
  margin-top: 14px;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .2em;
  color: rgba(255,255,255,.7);
}

.staff-list {
  margin: 48px auto 0;
  max-width: 560px;
  text-align: left;
}

.staff-list dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 20px 8px;
  border-bottom: 1px solid rgba(255,255,255,.32);
}

.staff-list dt {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .2em;
  color: rgba(255,255,255,.75);
}

.staff-list dd {
  font-size: 18px;
  letter-spacing: .06em;
}

.amp {
  font-family: var(--font-jp);
}

@media (min-width: 640px) {
  .staff-list dl {
    grid-template-columns: 160px 1fr;
    align-items: baseline;
  }
}

.credit-row {
  margin-top: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
  font-size: 14px;
  color: rgba(255,255,255,.85);
}

.credit-row div span {
  display: block;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .2em;
  color: rgba(255,255,255,.62);
  margin-bottom: 6px;
}

.credit-row div span .amp {
  display: inline;
  font-family: var(--font-jp);
  font-size: inherit;
  letter-spacing: inherit;
  color: inherit;
  margin: 0;
}

.btn {
  display: inline-block;
  margin-top: 36px;
  padding: 18px 64px;
  font-size: 16px;
  letter-spacing: .2em;
  color: var(--main);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.75);
  transition: background .35s ease, border-color .35s ease, color .35s ease;
}

.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--main);
}

.site-seal {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 20;
  width: 108px;
  height: 108px;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, .22));
  transition: transform .3s ease;
}

.site-seal:hover {
  transform: scale(1.06) rotate(-3deg);
}

@media (max-width: 480px) {
  .site-seal {
    right: 16px;
    bottom: 16px;
    width: 84px;
    height: 84px;
  }
}

.footer {
  position: relative;
  z-index: 1;
  background: var(--bg);
  text-align: center;
  padding: 40px 24px 24px;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .55) 50%, transparent);
}

.footer__copy {
  display: block;
  margin-top: 24px;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .08em;
  color: rgba(255,255,255,.58);
}

.js-fade {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 1s ease, transform 1s ease;
}

.js-fade.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.pc-only { display: none; }
@media (min-width: 768px) {
  .pc-only { display: inline; }
}

.sp-only { display: none; }
@media (max-width: 767px) {
  .sp-only { display: inline; }
}

.sparkle {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9999;
  pointer-events: none;
  font-size: var(--size);
  color: var(--color);
  text-shadow: 0 0 3px currentColor;
  animation: sparkleFly var(--duration) cubic-bezier(.22, .61, .36, 1) forwards;
}

@keyframes sparkleFly {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(.4) rotate(0deg);
  }
  25% {
    opacity: .75;
    transform: translate(calc(-50% + var(--dx) * .3), calc(-50% + var(--dy) * .3)) scale(1) rotate(45deg);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(.2) rotate(120deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js-fade { opacity: 1; transform: none; }
  .hero__logo,
  .hero__catch { opacity: 1; transform: none; }
  .sparkle { display: none; }
}