.world-stage {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: #0b5d79;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 28, 40, .58), rgba(5, 28, 40, .16) 42%, rgba(5, 28, 40, .05)),
    linear-gradient(0deg, rgba(5, 28, 40, .48), transparent 42%);
}

.hero-content {
  position: relative;
  z-index: 4;
  width: min(760px, calc(100% - 2rem));
  padding: calc(var(--header-height) + 10vh) 0 7vh;
  margin-left: clamp(1rem, 6vw, 6rem);
  color: var(--color-white);
  text-shadow: 0 2px 18px rgba(0,0,0,.28);
}

.hero-subtitle {
  max-width: 620px;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.5rem;
}

.ai-note {
  max-width: 560px;
  margin-top: 1rem;
  font-size: .92rem;
  opacity: .82;
}

.sound-toggle {
  position: absolute;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 5;
  padding: .7rem 1rem;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px;
  background: rgba(255,255,255,.15);
  color: #fff;
  backdrop-filter: blur(12px);
  cursor: pointer;
}