/* =============================================
   hero-a.css : フルスクリーンヒーロー（動画背景対応）
   ============================================= */

/* ── ベース ─────────────────────────────── */
.hero-a {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}

/* ── 背景レイヤー ────────────────────────── */
.hero-a__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-color: var(--clr-bg);
}

.hero-a__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-a__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(8, 8, 16, 0.80) 0%,
    rgba(8, 8, 16, 0.50) 50%,
    rgba(8, 8, 16, 0.85) 100%
  );
}

/* 動画なし時フォールバック */
.hero-a__bg-fallback {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    #080810 0%,
    #111128 40%,
    #0c0c1e 70%,
    #080810 100%
  );
}

/* ── Inner ──────────────────────────────── */
.hero-a__inner {
  position: relative;
  z-index: 1;
  height: 100%;
  max-width: var(--inner-width);
  margin: 0 auto;
  padding: var(--header-h) var(--inner-padding) var(--sp-xl);
  display: flex;
  align-items: center;
}

/* ── コンテンツ ─────────────────────────── */
.hero-a__content {
  max-width: 760px;
}

/* ── ラベル ─────────────────────────────── */
.hero-a__label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-en);
  font-size: var(--fz-2xs);
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--clr-gold);
  line-height: 1;
  opacity: 0;
}

.hero-a__label::before {
  content: '';
  display: block;
  width: 36px;
  height: 1px;
  background-color: var(--clr-gold);
  flex-shrink: 0;
}

/* ── タイトル ────────────────────────────── */
.hero-a__title {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: var(--sp-sm);
  opacity: 0;
}

.hero-a__title-en {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(52px, 8.5vw, 100px);
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--clr-white);
  line-height: 1.0;
}

.hero-a__title-en--stroke {
  color: transparent;
  -webkit-text-stroke: 1px var(--clr-gold);
}

/* ── サブコピー ─────────────────────────── */
.hero-a__sub {
  margin-top: var(--sp-md);
  font-family: var(--font-ja);
  font-size: var(--fz-base);
  font-weight: 300;
  letter-spacing: 0.12em;
  color: var(--clr-text);
  line-height: 2.2;
  opacity: 0;
}

/* ── CTA ────────────────────────────────── */
.hero-a__cta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-top: var(--sp-lg);
  opacity: 0;
}

.hero-a__cta-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 var(--sp-lg);
  font-family: var(--font-ja);
  font-size: var(--fz-sm);
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--clr-bg);
  background-color: var(--clr-gold);
  white-space: nowrap;
  transition: background-color var(--t-base);
}

.hero-a__cta-primary:hover {
  background-color: var(--clr-gold-light);
}

.hero-a__cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 var(--sp-md);
  font-family: var(--font-ja);
  font-size: var(--fz-sm);
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--clr-white);
  border: 1px solid rgba(255, 255, 255, 0.35);
  white-space: nowrap;
  transition:
    border-color var(--t-base),
    color var(--t-base);
}

.hero-a__cta-secondary:hover {
  border-color: var(--clr-gold);
  color: var(--clr-gold-light);
}

.hero-a__cta-secondary-arrow {
  display: inline-block;
  font-family: var(--font-en);
  font-size: var(--fz-base);
  line-height: 1;
  transition: transform var(--t-base);
}

.hero-a__cta-secondary:hover .hero-a__cta-secondary-arrow {
  transform: translateX(5px);
}

/* ── スクロールインジケーター ─────────────── */
.hero-a__scroll {
  position: absolute;
  bottom: var(--sp-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-xs);
  opacity: 0;
}

.hero-a__scroll-text {
  display: block;
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--clr-text-sub);
  line-height: 1;
}

.hero-a__scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--clr-gold), transparent);
  transform-origin: top;
  animation: hero-a-scroll 2.2s ease-in-out infinite;
}

@keyframes hero-a-scroll {
  0%   { transform: scaleY(0); opacity: 1; transform-origin: top; }
  49%  { transform: scaleY(1); opacity: 1; transform-origin: top; }
  50%  { transform: scaleY(1); opacity: 1; transform-origin: bottom; }
  100% { transform: scaleY(0); opacity: 0; transform-origin: bottom; }
}

/* ── Responsive ─────────────────────────── */
@media (max-width: 1024px) {
  .hero-a__inner {
    padding: var(--header-h-sp) var(--inner-padding-sp) 100px;
    align-items: flex-end;
  }

  .hero-a__content {
    max-width: 100%;
  }

  .hero-a__sub {
    font-size: var(--fz-sm);
    line-height: 2.0;
  }

  .hero-a__cta {
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-xs);
  }

  .hero-a__cta-primary,
  .hero-a__cta-secondary {
    justify-content: center;
  }

  .hero-a__scroll {
    bottom: var(--sp-md);
  }
}