/* ═══════════════════════════════════════════
   HERO — Scroll-driven Frame Animation
   Full viewport canvas + text overlay
   ═══════════════════════════════════════════ */

.hero {
  position: relative;
  height: 400vh; /* scroll distance for frame animation */
  background: var(--color-bg-deep);
}

.hero__sticky {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

/* ── Canvas: full screen ── */
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* ── Text Overlay ── */
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-left: max(var(--section-padding-x), calc((100vw - var(--container-max)) / 2 + var(--section-padding-x)));
  padding-right: var(--section-padding-x);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--ease-smooth);
}

.hero__overlay.is-visible {
  opacity: 1;
}

.hero__overlay > * {
  pointer-events: auto;
}

/* Dark gradient to ensure text readability */
.hero__overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(6, 10, 20, 0.75) 0%,
    rgba(6, 10, 20, 0.4) 50%,
    transparent 80%
  );
  z-index: -1;
}

.hero__eyebrow {
  display: block;
  margin-bottom: var(--space-6);
  transform: translateY(20px);
  opacity: 0;
  transition: transform 1.2s var(--ease-smooth),
              opacity 1.2s var(--ease-smooth);
}

.hero__overlay.is-visible .hero__eyebrow {
  transform: translateY(0);
  opacity: 1;
}

.hero__heading {
  font-size: var(--text-hero);
  line-height: var(--leading-hero);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-8);
  max-width: 700px;
  transform: translateY(40px);
  opacity: 0;
  transition: transform 1.4s var(--ease-smooth) 1s,
              opacity 1.4s var(--ease-smooth) 1s;
}

.hero__overlay.is-visible .hero__heading {
  transform: translateY(0);
  opacity: 1;
}

.hero__heading .accent {
  color: var(--color-accent);
}

.hero__tagline {
  font-size: clamp(1rem, 1.3vw, 1.25rem);
  font-weight: var(--weight-light);
  color: var(--color-text-secondary);
  line-height: var(--leading-body);
  max-width: 480px;
  margin-bottom: var(--space-10);
  transform: translateY(30px);
  opacity: 0;
  transition: transform 1.4s var(--ease-smooth) 1.3s,
              opacity 1.4s var(--ease-smooth) 1.3s;
}

.hero__overlay.is-visible .hero__tagline {
  transform: translateY(0);
  opacity: 1;
}

.hero__cta {
  transform: translateY(20px);
  opacity: 0;
  transition: transform 1.2s var(--ease-smooth) 1.6s,
              opacity 1.2s var(--ease-smooth) 1.6s;
}

.hero__overlay.is-visible .hero__cta {
  transform: translateY(0);
  opacity: 1;
}

/* ── Scroll Indicator ── */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  z-index: 3;
  opacity: 1;
  transition: opacity 0.4s var(--ease-out);
}

.hero__scroll.is-hidden {
  opacity: 0;
}

.hero__scroll-text {
  font-family: var(--font-mono);
  font-size: var(--text-eyebrow);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s var(--ease-out) infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(0.6); }
  50%      { opacity: 1;   transform: scaleY(1); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    height: 300vh;
  }
  .hero__overlay {
    padding: 0 6vw;
    justify-content: flex-end;
    padding-bottom: 20vh;
  }
  .hero__overlay::before {
    background: linear-gradient(
      to top,
      rgba(6, 10, 20, 0.85) 0%,
      rgba(6, 10, 20, 0.3) 50%,
      transparent 80%
    );
  }
  .hero__heading {
    font-size: clamp(2rem, 8vw, 3rem);
    max-width: 100%;
  }
  .hero__scroll {
    display: none;
  }
}