:root {
  --page-bg: #050102;
  --ink: #f6f0ea;
  --gold: #c6a021;
  --shadow: rgba(0, 0, 0, 0.45);
  --content-max: 68rem;
  --visual-edge-crop: 100px;
  /* セクション2がセクション1に被さる量 */
  --overlap: 18vw;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top, rgba(15, 47, 82, 0.42), transparent 30%),
    var(--page-bg);
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "MS PMincho", serif;
}

/* ===========================
   メインラッパー
=========================== */
.poster {
  position: relative;
  width: 100vw;
  overflow: hidden;
}

/* ===========================
   セクション1: キービジュアル
=========================== */
.visual {
  position: relative;
  width: 100%;
  /* 星のエフェクト */
}

.visual picture {
  display: block;
}

/* キービジュアル画像（切り抜かずに全体表示） */
.visual__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center top;
  clip-path: inset(0 0 1px 0);
}

/* 星のきらめきエフェクト（疑似要素） */
.visual::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 255, 255, 0.7) 0 0.18rem, transparent 0.2rem),
    radial-gradient(circle at 23% 9%, rgba(255, 255, 255, 0.45) 0 0.1rem, transparent 0.12rem),
    radial-gradient(circle at 78% 13%, rgba(255, 255, 255, 0.55) 0 0.12rem, transparent 0.14rem),
    radial-gradient(circle at 86% 6%, rgba(255, 255, 255, 0.35) 0 0.08rem, transparent 0.1rem),
    radial-gradient(circle at 70% 20%, rgba(233, 197, 95, 0.38) 0 0.18rem, transparent 0.2rem),
    radial-gradient(circle at 17% 62%, rgba(215, 233, 255, 0.18) 0 0.12rem, transparent 0.14rem);
  opacity: 0.8;
}

/* 左右と下部のフェードグラデーション */
.visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  //background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.38), transparent 11%, transparent 89%, rgba(0, 0, 0, 0.38)),
    /* 下端をページ背景色に溶け込ませる */
    linear-gradient(180deg, rgba(0, 0, 0, 0.18) 0%, transparent 16%, transparent 60%, var(--page-bg) 100%);
}

/* キャッチコピー */
.tagline {
  position: absolute;
  top: 30vh;
  right: 17vw;
  margin: 0;
  width: 3.2vw;
  z-index: 2;
  animation: fade-up 1.25s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.tagline img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===========================
   セクション2: ポスターコンテンツ
   マイナスマージンでセクション1に被せる
=========================== */
.poster__content {
  position: relative;
  z-index: 2;
  width: 100%;
  /* マイナスマージンで上のビジュアルセクションに被せる */
  margin-top: calc(var(--overlap) * -1);
  padding: 0 clamp(1.3rem, 3.8vw, 2.4rem) clamp(1.3rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  /* 背景は透明（bodyのbgが透けて見える） */
  background: transparent;
  animation: fade-up 1.25s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: 0.15s;
}

.eyebrow {
  margin: 0 0 clamp(0.85rem, 1.2vw, 1.1rem);
  font-size: clamp(0.95rem, 1.35vw, 1.45rem);
  line-height: 1.7;
  letter-spacing: 0.04em;
  text-shadow: 0 0.15rem 0.6rem var(--shadow);
}

.eyebrow em {
  font-style: italic;
  font-weight: 700;
}

.title {
  width: min(71%, 43rem);
  margin: 0;
  overflow: hidden;
}

.title img,
.subtitle img,
.lead img,
.roadshow img,
.coming-soon img,
.social-link img {
  display: block;
  width: 100%;
  height: auto;
}

.subtitle {
  width: min(34%, 14rem);
  margin: clamp(0.65rem, 1.4vw, 1rem) 0 0;
}

.lead {
  width: min(50%, 23rem);
  margin: clamp(1.35rem, 2.2vw, 1.9rem) 0 0;
}

.roadshow {
  display: block;
  width: min(66%, 35rem);
  margin: clamp(1.9rem, 3.4vw, 3rem) 0 0;
}

.coming-soon {
  width: min(24%, 10rem);
  margin: clamp(2.3rem, 3.2vw, 2.8rem) 0 0;
}

.socials {
  margin-top: clamp(1.9rem, 3.6vw, 3rem);
  display: flex;
  justify-content: center;
  gap: clamp(2.3rem, 2.6vw, 2.1rem);
}

.social-link {
  width: clamp(1.95rem, 3.8vw, 2.75rem);
  height: clamp(1.95rem, 3.8vw, 2.75rem);
  display: inline-grid;
  place-items: center;
  color: inherit;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  transition: transform 180ms ease, opacity 180ms ease;
}

.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-0.12rem);
  opacity: 0.78;
}

.social-link:focus-visible {
  outline: 0.12rem solid rgba(255, 255, 255, 0.72);
  outline-offset: 0.2rem;
}

.social-link img,
.social-link svg {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.social-link svg {
  width: 100%;
  height: 100%;
  fill: #fff;
}

/* XのSVGは余白が多いため少し拡大して他アイコンと揃える */
[aria-label="X"] img,
[aria-label="X"] svg {
  transform: scale(0.85);
}

.art-credit {
  margin: clamp(1.8rem, 2.8vw, 2.4rem) 0 0;
  font-size: clamp(0.95rem, 1.6vw, 1.45rem);
}

.copyright {
  margin: clamp(0.6rem, 1vw, 0.9rem) 0 0;
  font-size: clamp(0.72rem, 1vw, 1rem);
  letter-spacing: 0.02em;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 681px) {
  .coming-soon {
    margin-top: 32px;
  }

  .socials {
    margin-top: 62px;
    gap: 46px;
  }

  .social-link {
    width: 21px;
    height: 21px;
  }

  .art-credit {
    margin-top: 1.8rem;
    font-size: 12px;
  }

  .copyright {
    margin-top: 10px;
    font-size: 0.72rem;
  }
}

/* ===========================
   モバイル対応
=========================== */
@media (max-width: 680px) {
  :root {
    --overlap: min(28vw, 180px);
  }

  .visual__img {
    width: 100%;
    margin-left: 0;
  }


   .tagline {
     top: 25vw;
     right: 10.7vw;
     width: 4.8vw;
   }

  .poster__content {
    padding-left: 1rem;
    padding-right: 1rem;
    padding-bottom: 1.1rem;
  }

  .eyebrow {
    margin-right: 20px;
    width: min(60%, 27rem);
    margin-bottom: 0.7rem;
    font-size: 0.48rem;
    line-height: 1.55;
  }

  .title {
    width: min(82%, 27rem);
  }

  .subtitle {
    width: min(53%, 11rem);
  }

  .lead {
    width: min(74%, 16rem);
    margin-top: 1.15rem;
  }

  .roadshow {
    width: min(73%, 15.4rem);
    margin-top: 1.25rem;
  }

  .coming-soon {
    width: min(38%, 7.2rem);
  }

  .socials {
    position: relative;
    z-index: 3;
    gap: 1.6rem;
  }

  .social-link {
    width: 2.75rem;
    height: 2.75rem;
    pointer-events: auto;
  }

  .social-link img,
  .social-link svg {
    width: 1.35rem;
    height: 1.35rem;
    object-fit: contain;
  }

  .art-credit {
    font-size: 0.55rem;
  }

  .copyright {
    font-size: 0.55rem;
    line-height: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tagline,
  .poster__content,
  .social-link {
    animation: none;
    transition: none;
  }
}