/* ============================================================
   NAVBAR
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-shell {
  position: absolute;
  inset: 0;
  background: rgba(8, 6, 20, 0.35);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: background var(--dur-med) var(--ease-soft),
              border-color var(--dur-med) var(--ease-soft),
              backdrop-filter var(--dur-med) var(--ease-soft);
}
.nav.scrolled .nav-shell {
  background: rgba(8, 6, 20, 0.66);
  border-bottom-color: var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-logo {
  position: relative;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-logo .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad-primary);
  box-shadow: 0 0 12px var(--violet);
}

.nav-links {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--ink-dim);
  position: relative;
  padding: 0.3rem 0.1rem;
  transition: color var(--dur-fast);
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -4px;
  height: 2px;
  background: var(--grad-primary);
  transition: right var(--dur-med) var(--ease-out);
  border-radius: 2px;
}
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }

.nav-cta { display: flex; align-items: center; gap: var(--sp-3); }
.nav-cta .btn { padding: 0.65rem 1.3rem; font-size: 0.85rem; }

.nav-burger {
  display: none;
  position: relative;
  width: 42px; height: 42px;
  border-radius: var(--r-sm);
  background: var(--surface);
  border: 1px solid var(--border-hi);
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.nav-burger span {
  position: absolute;
  width: 18px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-soft), opacity var(--dur-fast);
}
.nav-burger span:nth-child(1) { transform: translateY(-5px); }
.nav-burger span:nth-child(3) { transform: translateY(5px); }
.nav-burger.open span:nth-child(1) { transform: rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: rotate(-45deg); }

/* Fullscreen mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  background: rgba(6, 5, 14, 0.9);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-soft);
}
.mobile-menu.open { opacity: 1; pointer-events: auto; }

.mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 7vw, 2.4rem);
  font-weight: 600;
  color: var(--ink-dim);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out), color var(--dur-fast);
}
.mobile-menu.open a { opacity: 1; transform: translateY(0); }
.mobile-menu a:hover { color: var(--ink); }
.mobile-menu .mobile-cta {
  margin-top: var(--sp-3);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease-out) 0.1s, transform 0.5s var(--ease-out) 0.1s;
}
.mobile-menu.open .mobile-cta { opacity: 1; transform: translateY(0); }

@media (max-width: 860px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .nav-burger { display: flex; }
}