/**
 * Section: Nav Transparent (with stub hero beneath)
 * Variants: [data-variant="dark"] (default), "light"
 */

.nav-transparent {
  position: relative;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  overflow: hidden;
}

.nav-transparent[data-variant="light"] {
  background: var(--color-bg-muted);
  color: var(--color-text);
}

/* ─── Transparent bar ─────────────────────────────── */

.nav-transparent__bar {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-transparent[data-variant="light"] .nav-transparent__bar {
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

.nav-transparent__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 80px;
}

.nav-transparent__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: inherit;
  text-decoration: none;
}

.nav-transparent__logo svg { width: 24px; height: 24px; color: inherit; }

.nav-transparent__links {
  display: flex;
  gap: var(--space-8);
}

.nav-transparent__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: inherit;
  opacity: 0.85;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.nav-transparent__link:hover {
  opacity: 1;
  text-decoration: none;
}

/* ─── Hero stub ───────────────────────────────────── */

.nav-transparent__hero {
  min-height: 560px;
  padding: calc(80px + var(--section-py)) 0 var(--section-py);
  position: relative;
  background:
    radial-gradient(ellipse at 20% 0%, color-mix(in srgb, var(--color-accent) 15%, transparent), transparent 60%),
    radial-gradient(ellipse at 80% 80%, color-mix(in srgb, var(--color-link) 15%, transparent), transparent 60%);
}

.nav-transparent[data-variant="light"] .nav-transparent__hero {
  background:
    radial-gradient(ellipse at 20% 0%, color-mix(in srgb, var(--color-accent) 40%, transparent), transparent 60%),
    radial-gradient(ellipse at 80% 80%, color-mix(in srgb, var(--color-link) 10%, transparent), transparent 60%);
}

.nav-transparent__hero-inner {
  max-width: 720px;
}

.nav-transparent__eyebrow {
  color: rgba(255, 255, 255, 0.65);
}

.nav-transparent[data-variant="light"] .nav-transparent__eyebrow {
  color: var(--color-text-subtle);
}

.nav-transparent__heading {
  color: inherit;
  margin-bottom: var(--space-6);
}

.nav-transparent__subtext {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 520px;
  line-height: var(--leading-relaxed);
}

.nav-transparent[data-variant="light"] .nav-transparent__subtext {
  color: var(--color-text-subtle);
}

/* Light variant CTA treatment */
.nav-transparent[data-variant="light"] .nav-transparent__cta {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-color: transparent;
}

/* ─── Mobile menu (hamburger + drawer) ──────────────
 *
 * CSS-only via the checkbox-hack:
 *   <input type="checkbox" id=… class="nav-transparent__check">
 *   <nav class="nav-transparent__links">…</nav>
 *   <label for=…>hamburger</label>
 * The :checked ~ sibling selector toggles the drawer. No JS needed.
 * The checkbox is visually hidden but reachable by keyboard via the
 * label. Drawer is position: fixed so it doesn't reflow the nav bar. */

.nav-transparent__check {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-transparent__toggle {
  display: none;
  background: none;
  border: 0;
  padding: var(--space-2);
  color: inherit;
  cursor: pointer;
  line-height: 0;
  border-radius: var(--radius-md);
}
.nav-transparent__toggle svg { width: 24px; height: 24px; display: block; }
.nav-transparent__toggle:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* ─── Responsive ──────────────────────────────────── */

@media (max-width: 809px) {
  .nav-transparent__inner { height: 64px; }

  .nav-transparent__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Drawer: full-width panel that drops below the bar when toggled */
  .nav-transparent__links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    background: var(--color-bg);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px color-mix(in srgb, var(--color-primary) 12%, transparent);
    z-index: var(--z-nav);
  }
  .nav-transparent__check:checked ~ .nav-transparent__links {
    display: flex;
  }
  /* Drawer links always render dark on the light drawer bg, regardless
     of whether the nav bar above is dark- or light-variant. */
  .nav-transparent__check:checked ~ .nav-transparent__links .nav-transparent__link {
    color: var(--color-text);
    opacity: 1;
    padding-block: var(--space-2);
  }

  .nav-transparent__hero {
    min-height: 480px;
    padding-top: calc(64px + var(--section-py-sm));
    padding-bottom: var(--section-py-sm);
  }
  .nav-transparent__subtext { font-size: var(--text-base); }
}