@charset "UTF-8";

:root {
  --bg:   #f4f4f4;
  --ink:  #16171a;
  --sub:  #85858a;
  --line: #d9d9db;
  --measure: 640px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

@media (min-width:  561px) { html { font-size: 112.5%; } }
@media (min-width: 1024px) { html { font-size: 125%;   } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN",
               "Noto Serif JP", "MS PMincho", serif;
  font-weight: 400;
  line-height: 2;
  letter-spacing: .08em;
  -webkit-font-smoothing: antialiased;
}

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

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 24px;
}

/* ヘッダー */

.site-header {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 22px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5em;
  animation: fadeUp .9s ease .1s both;
}

.site-header__logo,
.site-header__nav a {
  color: var(--sub);
  text-decoration: none;
  font-size: .72rem;
  letter-spacing: .2em;
  white-space: nowrap;
  transition: color .35s ease;
}
.site-header__logo:hover,
.site-header__nav a:hover { color: var(--ink); }

.site-header__logo { display: flex; align-items: center; gap: .8em; }
.site-header__logo img { width: 24px; height: 24px; }

.site-header__nav { display: flex; }
.site-header__nav a { padding: 0 1.2em; }
.site-header__nav a + a { border-left: 1px solid var(--line); }
.site-header__nav a:last-child { padding-right: 0; }
.site-header__nav a[aria-current="page"] { color: var(--ink); }

/* ポスター */

.poster {
  margin: 0;
  padding: clamp(16px, 3.5vh, 40px) 24px 0;
  text-align: center;
  perspective: 1400px;
  animation: posterRise 1.75s cubic-bezier(.14,.86,.26,1.02) .25s both;
}

.poster__track {
  display: grid;
  justify-items: center;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* スライド */
.poster__slide {
  grid-area: 1 / 1;
  max-width: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity .9s ease;
}
.poster__slide.is-active { opacity: 1; pointer-events: auto; }

.poster a { display: inline-block; }

.poster img {
  width: auto;
  margin: 0 auto;
  max-width: 100%;
  max-height: 86vh;
  max-height: 86svh;
  box-shadow:
      0 1px 2px rgba(22,23,26,.12),
      0 18px 44px rgba(22,23,26,.18);
  transition: box-shadow .4s ease, transform .4s ease;
}

.poster a:hover img {
  transform: translateY(-3px);
  box-shadow:
      0 1px 2px rgba(22,23,26,.14),
      0 26px 56px rgba(22,23,26,.22);
}

.poster__dots {
  display: flex;
  justify-content: center;
  gap: .9em;
  margin-top: 22px;
}
.poster__dots button {
  width: 7px;
  height: 7px;
  padding: 0;
  border: 1px solid var(--sub);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  transition: background .35s ease, border-color .35s ease;
}
.poster__dots button[aria-current="true"] { background: var(--ink); border-color: var(--ink); }

@keyframes posterRise {
  0% {
    opacity: 0;
    transform: translate3d(0, 86vh, 0) scale(.74) rotateX(24deg);
    filter: blur(16px);
  }
  46% { opacity: 1; }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1) rotateX(0deg);
    filter: blur(0);
  }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* タイトル */

.title {
  margin: clamp(46px, 9vw, 84px) 0 0;
  padding-top: clamp(20px, 4vh, 44px);
  text-align: center;
  animation: fadeUp 1.1s ease 1.55s both;
}

.title__org {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .3em;
  text-indent: .3em;
  color: var(--sub);
}

.title__main {
  margin: .5em 0 0;
  font-size: clamp(2rem, 7vw, 3.1rem);
  font-weight: 400;
  letter-spacing: .22em;
  text-indent: .22em;
  line-height: 1.4;
}

/* 上限2.1rem＝PCで11文字が1行に収まる限界 */
.title__main--long {
  font-size: clamp(1.45rem, 5.4vw, 2.1rem);
  letter-spacing: .2em;
  text-indent: .2em;
}

/* 折り返し */
.title__main--long span { display: inline-block; }

.title__date {
  margin: 1.4em 0 0;
  font-size: .95rem;
  letter-spacing: .16em;
  color: var(--ink);
}
.title__date span {
  font-size: .74em;
  letter-spacing: .2em;
  color: var(--sub);
  text-transform: uppercase;
}

/* 会場・詳細 */

.info {
  margin: clamp(56px, 11vw, 96px) auto 0;
  animation: fadeUp 1.1s ease 1.75s both;
}

.info dl { margin: 0; border-top: 1px solid var(--line); }

.info dl > div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0 1.5rem;
  padding: 22px 2px;
  border-bottom: 1px solid var(--line);
}

.info dt {
  font-size: .8rem;
  letter-spacing: .22em;
  color: var(--sub);
  line-height: 2.3;
}

.info dd {
  margin: 0;
  font-size: .96rem;
  line-height: 1.95;
}

.info dd a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
  transition: border-color .35s ease;
}
.info dd a:hover { border-bottom-color: var(--ink); }

.info__credit {
  margin: 2.4em 0 0;
  text-align: right;
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--sub);
}

/* About */

.about {
  margin: clamp(56px, 11vw, 96px) 0 0;
  text-align: center;
  animation: fadeUp 1.1s ease 1.75s both;
}
.about p {
  margin: 0 0 1.5em;
  font-size: .96rem;
  line-height: 2.2;
}
.about p:last-child { margin-bottom: 0; }

/* お知らせ */

.label {
  margin: 0 0 1.6em;
  font-size: .74rem;
  font-weight: 400;
  letter-spacing: .3em;
  text-indent: .3em;
  color: var(--sub);
  text-transform: uppercase;
}

.news {
  margin: clamp(56px, 11vw, 96px) 0 0;
  animation: fadeUp 1.1s ease 1.75s both;
}
.news ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.news li {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0 1.5rem;
  padding: 20px 2px;
  border-bottom: 1px solid var(--line);
}
.news time { font-size: .8rem; letter-spacing: .14em; color: var(--sub); line-height: 2.3; }
.news p { margin: 0; font-size: .94rem; }

.news a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
  transition: border-color .35s ease;
}
.news a:hover { border-bottom-color: var(--ink); }

/* ページリンク */

.pagelink {
  margin: clamp(48px, 9vw, 76px) 0 0;
  text-align: center;
  animation: fadeUp 1.1s ease 1.9s both;
}
.pagelink a {
  color: var(--sub);
  text-decoration: none;
  font-size: .8rem;
  letter-spacing: .2em;
  text-indent: .2em;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line);
  transition: color .35s ease, border-color .35s ease;
}
.pagelink a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* SNS */

.sns {
  margin: 26px 0 0;
  display: flex;
  justify-content: center;
  gap: 2.6em;
}

.sns a {
  color: var(--sub);
  text-decoration: none;
  font-size: .8rem;
  letter-spacing: .24em;
  text-indent: .24em;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color .35s ease, border-color .35s ease;
}
.sns a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* フッター */

.footer {
  margin-top: clamp(80px, 15vw, 140px);
  padding: 0 24px clamp(48px, 9vw, 80px);
  text-align: center;
  animation: fadeUp 1.1s ease 1.95s both;
}
.footer p {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .26em;
  text-indent: .26em;
  color: var(--sub);
}

/* スマホ */

@media (max-width: 560px) {
  .site-header { padding: 16px 20px 14px; gap: 1em; }
  .site-header__logo, .site-header__nav a { font-size: .66rem; letter-spacing: .14em; }
  .site-header__logo { gap: .6em; }
  .site-header__logo img { width: 20px; height: 20px; }
  .site-header__nav a { padding: 0 .9em; }

  @media (max-width: 380px) {
    .site-header__logo span { display: none; }
  }

  .poster { padding: 0; }
  .poster a { display: block; }
  .poster img {
    width: 100%;
    max-height: none;
    box-shadow: none;
  }
  .poster__dots { margin-top: 18px; }

  .title { margin-top: clamp(38px, 8vw, 64px); }

  .info dl > div,
  .news li { grid-template-columns: 1fr; gap: 2px; padding: 18px 2px; }
  .info dt { line-height: 1.9; }
  .sns { gap: 2em; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header, .poster, .title, .about, .info, .news, .pagelink, .footer { animation: none; }
  .poster a:hover img { transform: none; }
  .poster__slide { transition: none; }
}