/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 5rem;
}

.hero-media-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  filter: brightness(0.9) contrast(1.05);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 30%, var(--color-bg-main) 90%),
    linear-gradient(to bottom, rgba(5, 5, 5, 0.4) 0%, rgba(5, 5, 5, 0.2) 50%, var(--color-bg-main) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 950px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}

.hero-brand-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8.5vw, 7.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.15em;
  white-space: nowrap;
  margin-top: 0.2rem;
}

.logo-nano {
  color: var(--color-text-main);
  line-height: 1;
}

.logo-qwi {
  background-color: var(--color-accent); /* NEON GREEN */
  color: #050505; /* BLACK */
  font-size: 1.18em; /* QWIの文字を大きく拡大 */
  font-weight: 800;
  padding: 0.04em 0.2em; /* 背景枠ぎりぎりまで文字を詰めるタイトなパディング */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0.85;
  border-radius: 0; /* 直角 */
  box-shadow: none; /* glow/shadow なし */
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  flex-wrap: wrap; /* モバイル画面でのはみ出しを防止 */
}

/* 明確に色味を分ける指定 */
.tagline-visual {
  color: var(--color-neon-yellow);
}

.tagline-amp {
  color: var(--color-accent);
}

.tagline-music {
  color: var(--color-neon-pink);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.65;
  transition: opacity var(--transition-fast);
}

.hero-scroll-indicator:hover {
  opacity: 1;
}

.scroll-line {
  width: 2px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-neon-yellow), var(--color-neon-pink), transparent);
  animation: scrollPulse 2s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}

.scroll-text {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

@keyframes scrollPulse {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  50.1% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* --- Mobile Responsive Optimizations --- */
@media (max-width: 768px) {
  .hero-brand-title {
    font-size: clamp(2rem, 9vw, 3.8rem);
    gap: 0.12em;
  }
  .logo-qwi {
    font-size: 1.15em;
    padding: 0.03em 0.18em;
  }
  .hero-tagline {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    gap: 0.3em;
  }
}

@media (max-width: 400px) {
  .hero-brand-title {
    font-size: clamp(1.85rem, 8.5vw, 2.5rem);
  }
}