nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 5vw, 4rem);
  height: var(--nav-h);
  transition: all var(--transition);
}

nav.scrolled {
  background: rgba(8, 9, 12, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-bright);
  letter-spacing: -0.02em;
}

.nav-brand em {
  font-style: italic;
  color: var(--blue);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--blue);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--text-bright); }
.nav-links a:hover::after { width: 100%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-lang {
  display: flex;
  gap: 0.4rem;
}

.nav-lang button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: all var(--transition);
}

.nav-lang button:hover,
.nav-lang button.active {
  border-color: var(--blue);
  color: var(--blue-bright);
  background: var(--blue-glow);
}

/* ── HAMBURGER ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 8px;
  transition: border-color var(--transition);
}

.hamburger:hover { border-color: var(--blue); }

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── MOBILE NAV DRAWER ── */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  bottom: 0;
  background: rgba(8, 9, 12, 0.99);
  backdrop-filter: blur(20px);
  z-index: 199;
  padding: 0;
  overflow-y: auto;
  transform: translateY(-100%);
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
}

.mobile-drawer.open {
  transform: translateY(0);
  padding: 2rem clamp(1.25rem, 5vw, 2rem);
}

/* Mobile nav tabs */
.mobile-nav-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.mobile-nav-tab {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.mobile-nav-tab:hover {
  background: var(--bg3);
  color: var(--text-bright);
  border-color: var(--border);
}

.mobile-nav-tab i {
  width: 18px;
  text-align: center;
  color: var(--blue);
  font-size: 0.85rem;
}

/* Mobile project carousel trigger */
.mobile-carousel-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--blue-glow);
  border: 1px solid var(--blue-dim);
  color: var(--blue-bright);
  font-size: 0.85rem;
  font-weight: 600;
  width: 100%;
  transition: all var(--transition);
}

.mobile-carousel-trigger:hover {
  background: rgba(59,130,246,0.22);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-drawer { display: block; }
}