/* ══════════════════════════════════════════
   NAV LAYER — hub, bar, ecosystem, satellites
   z-index map: nav-hub 450 | sl-overlay 500 | nav-open-btn 1000
══════════════════════════════════════════ */

/* Hide original sublayer menu button — replaced by nav-open-btn */
.menu-btn {
  visibility: hidden !important;
  pointer-events: none !important;
}

/* ── NAV OPEN / CLOSE BUTTON ── */
.nav-open-btn {
  position: fixed; top: 20px; left: 38px; z-index: 1000;
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.nav-open-btn svg { width: 36px; height: 36px; overflow: visible; }
.nav-open-btn svg line {
  stroke: #C9A84C; stroke-width: 1.8; stroke-linecap: round;
  transform-origin: 18px 18px;
  transition: transform 0.5s cubic-bezier(0.22,1,0.36,1);
}
.nav-open-btn.open svg .nob-h { transform: rotate(45deg);  }
.nav-open-btn.open svg .nob-v { transform: rotate(-45deg); }

/* ── NAV HUB ── */
.nav-hub {
  position: fixed; inset: 0; z-index: 450;
  pointer-events: none; opacity: 0;
  transition: opacity 0.55s cubic-bezier(0.22,1,0.36,1);
  overflow: hidden;
  /* Dark diagonal-stripe background */
  background-color: #141414;
  background-image:
    repeating-linear-gradient(
      -45deg,
      rgba(255,255,255,0.025) 0px,
      rgba(255,255,255,0.025) 1px,
      transparent 1px,
      transparent 14px
    );
}
.nav-hub.open { opacity: 1; pointer-events: all; }

/* ── NAV BAR ── */
.nav-bar {
  position: absolute; top: 0; left: 0; right: 0; height: 70px;
  display: flex; align-items: center;
  padding: 0 72px 0 100px;
  opacity: 0; transform: translateY(-10px);
  transition: opacity 0.6s ease 0.35s, transform 0.6s ease 0.35s;
}
.nav-hub.open .nav-bar { opacity: 1; transform: translateY(0); }

/* gold rule under bar */
.nav-bar::after {
  content: '';
  position: absolute; bottom: 0; left: 72px; right: 72px; height: 1px;
  background: linear-gradient(to right, transparent, rgba(201,168,76,0.28), transparent);
  opacity: 0;
  transition: opacity 0.6s ease 0.7s;
}
.nav-hub.open .nav-bar::after { opacity: 1; }

.nav-points { display: flex; gap: clamp(32px, 5vw, 72px); align-items: center; }

.nav-point {
  font-family: 'Bison', 'Barlow Condensed', sans-serif;
  font-size: clamp(0.88rem, 1.6vw, 1.25rem);
  font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  cursor: pointer; white-space: nowrap;
  opacity: 0; transform: translateX(-8px);
  transition: color 0.3s ease, opacity 0.5s ease, transform 0.5s ease;
}
.nav-hub.open .nav-point { opacity: 1; transform: translateX(0); }
.nav-hub.open .nav-point:nth-child(1) { transition-delay: 0.45s, 0.45s, 0.45s; }
.nav-hub.open .nav-point:nth-child(2) { transition-delay: 0.53s, 0.53s, 0.53s; }
.nav-hub.open .nav-point:nth-child(3) { transition-delay: 0.61s, 0.61s, 0.61s; }
.nav-point:hover { color: #C9A84C; }

/* ── ECOSYSTEM STAGE ── */
.eco-stage {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}

/* ── MPE CENTER LOGO ── */
.eco-center {
  position: relative; z-index: 5;
  width: clamp(130px, 16vw, 240px);
  opacity: 0; transform: scale(1);
  transition: none;
}
.eco-center svg { width: 100%; height: auto; display: block; }

/* animation states driven by JS class toggles */
.eco-center.flash {
  opacity: 1; transform: scale(1.14);
  transition: opacity 0.07s ease, transform 0.07s ease;
}
.eco-center.settle {
  opacity: 0.62; transform: scale(0.86);
  transition: opacity 0.85s ease, transform 0.85s cubic-bezier(0.22,1,0.36,1);
}

/* ── SATELLITE LOGOS ── */
.eco-sat {
  position: absolute; pointer-events: none;
  will-change: left, top, width, opacity;
  transition: none;
}
.eco-sat img {
  width: 100%; height: auto; display: block;
  filter: brightness(0) invert(1);  /* force white */
  object-fit: contain;
}

/* ── CLOSE HINT ── */
.nav-close-hint {
  position: absolute; bottom: 28px; left: 50%;
  transform: translateX(-50%);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.58rem; letter-spacing: 0.28em; text-transform: uppercase;
  color: rgba(255,255,255,0.14); white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity 0.6s ease 1.2s;
}
.nav-hub.open .nav-close-hint { opacity: 1; }

/* ══════════════════════════════════════════
   PORTRAIT MOBILE
══════════════════════════════════════════ */
@media (orientation: portrait) {
  .nav-open-btn { top: 16px; left: 20px; }
  .nav-bar { padding: 0 20px 0 76px; }
  .nav-points { gap: clamp(20px, 5vw, 40px); }
  .nav-point { font-size: clamp(0.72rem, 3.8vw, 0.95rem); }
  .nav-bar::after { left: 20px; right: 20px; }
  .eco-center { width: clamp(90px, 24vw, 150px); }
  .nav-close-hint { display: none; }
}

/* ══════════════════════════════════════════
   LANDSCAPE MOBILE
══════════════════════════════════════════ */
@media (max-width: 1024px) and (orientation: landscape) {
  .nav-open-btn { top: 14px; left: 20px; }
  .nav-bar { padding: 0 36px 0 88px; }
  .nav-points { gap: 36px; }
  .nav-point { font-size: clamp(0.8rem, 2vw, 1rem); }
  .eco-center { width: clamp(100px, 14vw, 180px); }
}