nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 2.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(6,6,11,0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
nav.scrolled { background: rgba(6,6,11,0.95); }

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.logo-mark {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #059669);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px rgba(16,185,129,0.35);
  position: relative;
}
.logo-mark svg { width: 18px; height: 18px; }

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--accent2);
  transition: width 0.25s;
}
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: all 0.25s;
  text-decoration: none;
}
.nav-cta:hover {
  background: var(--accent2);
  box-shadow: 0 0 20px var(--glow);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 110;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(6,6,11,0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-overlay a {
  color: var(--text);
  text-decoration: none;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s;
}
.mobile-overlay.open a {
  opacity: 1;
  transform: translateY(0);
}
.mobile-overlay.open a:nth-child(1) { transition-delay: 0.1s; }
.mobile-overlay.open a:nth-child(2) { transition-delay: 0.18s; }
.mobile-overlay.open a:nth-child(3) { transition-delay: 0.26s; }
.mobile-overlay.open a:nth-child(4) { transition-delay: 0.34s; }
.mobile-overlay a:hover { color: var(--accent2); }