.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  padding: 14px 40px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.navbar.scrolled { border-color: var(--border-subtle); }
.nav-logo { font-weight: 700; font-size: 1.15rem; color: var(--accent); letter-spacing: -0.02em; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 0.85rem; font-weight: 500; color: var(--text-secondary);
  transition: color 0.25s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -4px;
  width: 0; height: 2px; background: var(--accent);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

.hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 4px;
}
.hamburger span {
  width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: 0.3s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }