/* ═══════════════════════════════════════════════
   OPALINE — HERO SCROLL SECTION
   Canvas + scroll container + frame engine support
   ═══════════════════════════════════════════════ */

/* Hero scroll section — height set by frameEngine.js */
#hero-scroll {
  position: relative;
  /* Height set dynamically by frameEngine.js = 58,600px */
}

/* Canvas — sticky within hero, unsticks after */
.frame-canvas {
  position: sticky;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  background: var(--navy-twilight); /* Shows while first frame loads */
  will-change: contents;
}

/* Tagline overlay */
.hero__tagline {
  position: fixed;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(14px, 2vw, 20px);
  color: var(--ivory-stone);
  letter-spacing: 0.08em;
  opacity: 0;
  transition: opacity 1.2s var(--ease-elegant);
  pointer-events: none;
  z-index: 50;
  text-align: center;
  white-space: nowrap;
}

.hero__tagline--visible {
  opacity: 0.85;
}

/* Scene indicator (subtle) */
.hero__scroll-hint {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 50;
  opacity: 0.5;
  transition: opacity 0.8s var(--ease-smooth);
  pointer-events: none;
}

.hero__scroll-hint span {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--ivory-stone);
}

.hero__scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--ivory-stone), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 0.8; transform: scaleY(1.3); }
}

/* Hide scroll hint after initial frames */
.hero__scroll-hint--hidden {
  opacity: 0;
}

/* Center Logo Overlay */
.hero__center-logo {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(1);
  z-index: 40;
  width: clamp(200px, 30vw, 400px); /* Responsive sizing */
  pointer-events: none;
  opacity: 1;
  transition: opacity 1.2s var(--ease-elegant), transform 1.2s var(--ease-elegant);
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__center-logo img {
  width: 100%;
  height: auto;
  object-fit: contain;
  /* Add elegant shadow to separate from the blue water */
  filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.5));
}

.hero__center-logo--hidden {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.95);
}