/* =============================================================================
   Luminous Membrane 2.0 - premium polish layer
   Progressive enhancement on top of ascend.css. No content changes.
   ============================================================================= */

:root {
  --nav-progress: 0%;
  --glass-blur: 18px;
  --glass-sat: 1.2;
  --rim-light: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --rim-teal: inset 0 0 0 1px rgba(94, 200, 192, 0.08);
}

/* Richer void atmosphere */
body {
  background:
    radial-gradient(ellipse 90% 55% at 12% -6%, rgba(94, 200, 192, 0.11), transparent 52%),
    radial-gradient(ellipse 70% 48% at 96% 8%, rgba(142, 184, 200, 0.08), transparent 50%),
    radial-gradient(ellipse 55% 40% at 50% 105%, rgba(107, 196, 160, 0.06), transparent 48%),
    radial-gradient(ellipse 40% 30% at 70% 40%, rgba(94, 200, 192, 0.03), transparent 60%),
    linear-gradient(180deg, #0a0f16 0%, var(--p-canvas-mid) 42%, #0d141c 100%);
}

body::before {
  opacity: 0.55;
  background:
    radial-gradient(ellipse 75% 55% at 48% 18%, rgba(94, 200, 192, 0.055), transparent 68%),
    radial-gradient(circle at 80% 70%, rgba(142, 184, 200, 0.03), transparent 40%);
}

/* Scroll progress (top edge) */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: var(--nav-progress);
  z-index: 10001;
  pointer-events: none;
  background: linear-gradient(90deg, var(--accent), var(--p-aurora), var(--success));
  box-shadow: 0 0 12px rgba(94, 200, 192, 0.45);
  transition: width 80ms linear;
}

/* Sticky glass nav evolution */
.site-nav {
  transition:
    background var(--motion-dur-base) var(--ease),
    border-color var(--motion-dur-base) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease),
    backdrop-filter var(--motion-dur-base) var(--ease);
}
.site-nav.is-scrolled {
  background: rgba(11, 16, 24, 0.82);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  border-bottom-color: rgba(94, 200, 192, 0.18);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
}
.site-nav .nav-links a.is-active {
  color: var(--accent);
  background: var(--accent-soft);
}
.site-nav .nav-links a {
  position: relative;
}
.site-nav .nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  bottom: 0.15rem;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(94, 200, 192, 0.5);
}

/* Mobile nav drawer */
.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--border-default);
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 10px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition:
    border-color var(--motion-dur-fast) var(--ease),
    background var(--motion-dur-fast) var(--ease),
    transform var(--motion-dur-fast) var(--motion-ease-spring);
}
.nav-toggle:hover { border-color: var(--accent-border); }
.nav-toggle:active { transform: scale(0.96); }
.nav-toggle svg { display: block; }
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }
  .site-nav .nav-links {
    position: fixed;
    top: calc(var(--nav-h) + 0.35rem);
    right: 0.75rem;
    left: 0.75rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    background: rgba(14, 20, 30, 0.94);
    border: 1px solid var(--accent-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), var(--rim-light);
    backdrop-filter: blur(20px);
    transform: translateY(-8px) scale(0.98);
    opacity: 0;
    pointer-events: none;
    transition:
      opacity var(--motion-dur-base) var(--ease),
      transform var(--motion-dur-base) var(--motion-ease-spring);
    z-index: 120;
  }
  .site-nav.nav-open .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }
  .site-nav .nav-links a {
    padding: 0.75rem 0.9rem;
    font-size: 0.95rem;
    border-radius: 10px;
  }
  .site-nav .nav-cta {
    display: none;
  }
}

/* Elevated multi-layer glass */
.glass {
  background:
    linear-gradient(165deg, rgba(28, 40, 56, 0.55), rgba(14, 20, 30, 0.78));
  border: 1px solid rgba(142, 184, 200, 0.16);
  box-shadow:
    var(--rim-light),
    var(--rim-teal),
    0 16px 48px rgba(0, 0, 0, 0.22),
    0 0 0 1px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  position: relative;
  overflow: hidden;
}
.glass::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    125deg,
    rgba(255, 255, 255, 0.045) 0%,
    transparent 38%,
    transparent 62%,
    rgba(94, 200, 192, 0.04) 100%
  );
  opacity: 0.9;
}
.glass > * { position: relative; z-index: 1; }

/* Magnetic primary CTA press */
.btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.btn-primary {
  box-shadow:
    0 8px 28px rgba(94, 200, 192, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.28), transparent 42%);
  opacity: 0;
  transition: opacity var(--motion-dur-base) var(--ease);
  z-index: -1;
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:active {
  transform: scale(0.97) translateY(0);
  box-shadow: 0 4px 16px rgba(94, 200, 192, 0.2);
}
.btn.is-magnetic {
  will-change: transform;
}

/* Version badge living pulse */
.hero .codename,
.brand-text .ver {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.hero .codename::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(94, 200, 192, 0.55);
  animation: membraneBreath 2.8s ease-in-out infinite;
}

/* Hero stage depth */
.hero-stage {
  box-shadow:
    0 0 0 1px rgba(94, 200, 192, 0.12),
    0 0 48px rgba(94, 200, 192, 0.14),
    0 32px 80px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.hero-stage::before {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 70% 50% at 50% 40%, transparent 30%, rgba(11, 16, 24, 0.35) 100%);
  border-radius: inherit;
}

/* Scroll reveal (IO-driven) */
[data-reveal] {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition:
      opacity 0.65s var(--motion-ease-out),
      transform 0.65s var(--motion-ease-out),
      filter 0.65s var(--motion-ease-out);
    filter: blur(4px);
  }
  [data-reveal].is-revealed {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
  .section,
  .value-strip {
    animation: none;
  }
}

/* Plane explorer elevation */
.plane-node {
  position: relative;
  overflow: hidden;
}
.plane-node::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(94, 200, 192, 0.12), transparent 55%);
  opacity: 0;
  transition: opacity var(--motion-dur-base) var(--ease);
}
.plane-node:hover::before,
.plane-node[aria-pressed="true"]::before { opacity: 1; }
.plane-detail {
  transition:
    border-color var(--motion-dur-base) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease),
    transform var(--motion-dur-base) var(--ease);
}
.plane-detail.is-updating {
  opacity: 0.55;
  transform: translateY(4px);
}

/* Lifecycle theatrical steps */
.lifecycle .step {
  position: relative;
  transition:
    color var(--motion-dur-base) var(--ease),
    border-color var(--motion-dur-base) var(--ease),
    background var(--motion-dur-base) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease),
    transform var(--motion-dur-fast) var(--motion-ease-spring);
}
.lifecycle .step.active {
  transform: scale(1.06);
  box-shadow: 0 0 20px rgba(107, 196, 160, 0.25);
}
.lifecycle .step.done {
  background: rgba(94, 200, 192, 0.1);
}

/* Metric cards + gauge polish */
.metric-card .gauge .arc {
  filter: drop-shadow(0 0 6px rgba(94, 200, 192, 0.35));
}
.metric-card .m-val {
  font-variant-numeric: tabular-nums;
  transition: color var(--motion-dur-base) var(--ease);
}

/* Install code block + copy delight */
.code-block {
  background:
    linear-gradient(180deg, rgba(12, 18, 26, 0.9), rgba(8, 12, 18, 0.95));
  border-color: rgba(94, 200, 192, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 12px 32px rgba(0, 0, 0, 0.25);
}
.code-block pre {
  color: #c8e4e0;
}
.code-block pre .tok-cmd { color: #7ad8d0; }
.code-block pre .tok-comment { color: #6b7a8c; }
.copy-btn.is-success {
  color: #061016 !important;
  background: var(--success) !important;
  border-color: transparent !important;
  box-shadow: 0 0 20px rgba(107, 196, 160, 0.35);
}
.copy-toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 10002;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  background: rgba(18, 26, 36, 0.94);
  border: 1px solid rgba(107, 196, 160, 0.4);
  color: var(--success);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 24px rgba(107, 196, 160, 0.15);
  backdrop-filter: blur(12px);
  transition: transform 0.35s var(--motion-ease-spring), opacity 0.25s var(--ease);
  opacity: 0;
  pointer-events: none;
}
.copy-toast.is-on {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* FAQ smooth expand feel */
.faq-item {
  transition:
    border-color var(--motion-dur-base) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease),
    background var(--motion-dur-base) var(--ease);
}
.faq-item[open] {
  border-color: var(--accent-border);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18), 0 0 0 1px rgba(94, 200, 192, 0.08);
  background: rgba(18, 26, 36, 0.85);
}
.faq-item .ans {
  animation: faqIn 0.28s var(--motion-ease-out) both;
}
@keyframes faqIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Walk steps sequential feel */
.walk-step {
  transition:
    border-color var(--motion-dur-base) var(--ease),
    transform var(--motion-dur-fast) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease);
}
.walk-step:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Shield cards crystalline edge */
.shield-card::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(94, 200, 192, 0.06);
}

/* Footer polish */
.site-footer {
  padding-bottom: 6.5rem;
  border-top-color: rgba(94, 200, 192, 0.1);
}

/* Ambient audio toggle */
.ambient-toggle {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border-default);
  background: rgba(14, 20, 30, 0.88);
  color: var(--fg-muted);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition:
    color var(--motion-dur-fast) var(--ease),
    border-color var(--motion-dur-fast) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease);
}
.ambient-toggle:hover,
.ambient-toggle[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent-border);
  box-shadow: 0 0 20px rgba(94, 200, 192, 0.15);
}
.ambient-toggle[aria-pressed="true"] {
  background: rgba(94, 200, 192, 0.1);
}

/* Shimmer skeleton utility */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(94, 200, 192, 0.06) 0%,
    rgba(94, 200, 192, 0.14) 50%,
    rgba(94, 200, 192, 0.06) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border-radius: 8px;
}
@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* Terminal easter-egg mode */
body.terminal-mode {
  --font: var(--mono);
  --display: var(--mono);
}
body.terminal-mode .hero h1 {
  letter-spacing: 0;
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
}
body.terminal-mode .glass {
  border-radius: 4px;
  backdrop-filter: none;
}

/* Mobile bottom CTA bar */
.mobile-dock {
  display: none;
  position: fixed;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.75rem;
  z-index: 85;
  gap: 0.5rem;
  padding: 0.55rem;
  border-radius: 16px;
  background: rgba(14, 20, 30, 0.92);
  border: 1px solid rgba(94, 200, 192, 0.22);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(16px);
}
@media (max-width: 720px) {
  .mobile-dock.is-on:not(.is-dismissed) {
    display: flex;
  }
  .mobile-dock .btn {
    flex: 1;
    padding: 0.75rem 0.5rem;
    font-size: 0.82rem;
  }
  .ambient-toggle {
    bottom: 5.25rem;
    right: 0.85rem;
  }
}

/* High contrast + reduced motion polish */
@media (prefers-reduced-motion: reduce) {
  .scroll-progress { transition: none; }
  .btn-primary::before { display: none; }
  .hero .codename::before,
  .skeleton { animation: none !important; }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
  .faq-item .ans { animation: none; }
}
@media (prefers-contrast: more) {
  .glass {
    border-width: 2px;
    background: rgba(10, 14, 22, 0.95);
  }
  .site-nav.is-scrolled {
    background: #0b1018;
  }
}

/* =============================================================================
   3.4.0 Crystal Membrane - Grok 4.6 craft layer
   Brand island, X follow, sticky CTA, 44px rails, fleet counter room
   ============================================================================= */

.brand-island {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
  min-width: 0;
  padding-right: 0.85rem;
  margin-right: 0.15rem;
  border-right: 1px solid rgba(94, 200, 192, 0.16);
}
.x-follow {
  display: inline-flex;
  align-items: center;
  height: 36px;
  min-width: 36px;
  max-height: 36px;
  flex-shrink: 0;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  text-decoration: none;
  overflow: hidden;
  color: var(--accent);
  background: rgba(94, 200, 192, 0.06);
  transition:
    border-color var(--motion-dur-fast) var(--ease),
    background var(--motion-dur-fast) var(--ease),
    box-shadow var(--motion-dur-base) var(--ease);
}
.x-follow:hover,
.x-follow:focus-visible {
  border-color: var(--accent-border);
  background: var(--accent-soft);
  box-shadow: var(--glow-cyan);
  color: var(--accent-hover);
  outline: none;
}
.x-follow-mark {
  width: 36px;
  height: 36px;
  max-width: 36px;
  max-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.x-follow-mark svg {
  width: 11px;
  height: 11px;
  max-width: 11px;
  max-height: 11px;
}
.x-follow-handle {
  display: none;
  font-size: 0.62rem;
  white-space: nowrap;
  padding-right: 0.55rem;
  color: var(--fg-muted);
}
@media (min-width: 1536px) {
  .x-follow-handle { display: inline; }
}

.hero-quiet-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.7rem;
  margin-top: 0.95rem;
  font-size: 0.86rem;
  color: var(--fg-subtle);
}
.hero-quiet-links a {
  color: var(--fg-muted);
  text-decoration: none;
  min-height: var(--touch);
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition:
    color var(--motion-dur-fast) var(--ease),
    border-color var(--motion-dur-fast) var(--ease);
}
.hero-quiet-links a:hover,
.hero-quiet-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent-border);
  outline: none;
}
.hero-quiet-links .sep { opacity: 0.35; }

.sticky-cta {
  position: fixed;
  left: 50%;
  bottom: 1.15rem;
  z-index: 88;
  display: none;
  align-items: center;
  gap: 0.85rem;
  max-width: min(640px, calc(100vw - 1.5rem));
  padding: 0.55rem 0.55rem 0.55rem 1.05rem;
  border-radius: 999px;
  background: rgba(14, 20, 30, 0.92);
  border: 1px solid rgba(94, 200, 192, 0.24);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.38), var(--glow-cyan);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  transform: translateX(-50%) translateY(120%);
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--motion-dur-slow) var(--motion-ease-out),
    opacity var(--motion-dur-base) var(--ease);
}
.sticky-cta.is-on {
  display: flex;
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.sticky-cta p {
  font-size: 0.82rem;
  color: var(--fg-muted);
  line-height: 1.35;
  margin: 0;
}
.sticky-cta .btn {
  flex-shrink: 0;
  padding: 0.55rem 0.95rem;
}
.sticky-cta-dismiss {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg-subtle);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
}
.sticky-cta-dismiss:hover,
.sticky-cta-dismiss:focus-visible {
  color: var(--fg-default);
  background: rgba(94, 200, 192, 0.08);
  outline: none;
  box-shadow: var(--focus-ring);
}
@media (max-width: 720px) {
  .sticky-cta { display: none !important; }
}

.mobile-dock {
  align-items: center;
}
.mobile-dock.is-on { display: flex; }
.mobile-dock.is-dismissed,
.mobile-dock:not(.is-on) {
  display: none;
}
.dock-dismiss {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg-subtle);
  width: 44px;
  height: 44px;
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
  font-size: 1.1rem;
}
.dock-dismiss:hover,
.dock-dismiss:focus-visible {
  color: var(--fg-default);
  background: rgba(94, 200, 192, 0.08);
  outline: none;
}

.site-footer a,
.site-footer span {
  min-height: 2rem;
  display: inline-flex;
  align-items: center;
}

@media (prefers-reduced-transparency: reduce) {
  .sticky-cta,
  .mobile-dock,
  .copy-toast,
  .ambient-toggle,
  .site-nav {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: #101820;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sticky-cta {
    transition: none;
  }
}