:root {
  --sumi: #1C1F26;
  --kinari: #F4EFE6;
  --kohaku: #C9923A;
  --ao: #4A6E8A;
  --hai: #8B8780;
  --max: 640px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--sumi);
  color: var(--kinari);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

#lp {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  background: var(--kinari);
}

.notice {
  background: #141414;
  color: #CFC9BF;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  text-align: center;
  padding: 7px 14px;
}
.part { margin: 0; padding: 0; }
.frame { position: relative; display: block; line-height: 0; }
.frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* 画像の中のボタンの位置に重ねる、実際に押せる領域 */
.hot {
  position: absolute;
  display: block;
  color: transparent;
  font-size: 1px;
  text-decoration: none;
  border-radius: 6px;
  outline-offset: 3px;
}
.hot:focus-visible { outline: 3px solid var(--kohaku); }
.hot-fv { left: 50%; top: 92%; width: 46%; height: 8%; }
.hot-cta { left: 6%; top: 82.5%; width: 88%; height: 7.5%; border-radius: 10px; }

/* 一番の見せ場：FV の扉の明かりが、読み込み後にわずかに強まる */
.glow {
  position: absolute;
  left: 52%; top: 46%;
  width: 36%; height: 42%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(201,146,58,0.22) 0%, rgba(201,146,58,0.10) 40%, rgba(201,146,58,0) 70%);
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
  transition: opacity 2.4s ease-out;
}
.is-ready .glow { opacity: 1; }

/* スクロールで各パートが静かに浮く */
.part { opacity: 0; transform: translateY(14px); transition: opacity .7s ease-out, transform .7s ease-out; }
.part.is-in, .part-fv { opacity: 1; transform: none; }

.foot {
  padding: 28px 20px 110px;
  background: var(--sumi);
  color: var(--kinari);
  text-align: center;
  font-size: 12px;
  line-height: 1.9;
}
.foot-note { margin: 0 0 10px; color: #A8A39C; }
.foot-brand { margin: 0; letter-spacing: .12em; }

/* 追従ボタン */
.sticky {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, rgba(28,31,38,.96), rgba(28,31,38,.86));
  transform: translateY(110%);
  transition: transform .35s ease-out;
  z-index: 10;
}
.sticky.is-on { transform: none; }
.sticky-btn {
  display: block;
  max-width: var(--max);
  margin: 0 auto;
  min-height: 48px;
  line-height: 48px;
  text-align: center;
  background: var(--kohaku);
  color: var(--sumi);
  font-size: 16px;
  font-weight: 400;
  letter-spacing: .06em;
  border-radius: 8px;
  text-decoration: none;
}

@media (min-width: 900px) {
  body { background: #15171C; }
  .sticky { display: none; }
  .foot { padding-bottom: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .part, .glow, .sticky { transition: none; }
  .part { opacity: 1; transform: none; }
  .glow { opacity: 1; }
}