.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--bg-secondary);
  height: var(--nav-height);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms, box-shadow 200ms;
}
.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 2px 12px rgba(44,18,0,0.07);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo .agent { color: var(--orange); }
.nav__logo .ia    { color: var(--blue); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transition: transform 200ms;
  border-radius: 2px;
}
.nav__link:hover           { color: var(--orange); }
.nav__link:hover::after,
.nav__link.active::after   { transform: scaleX(1); }
.nav__link.active          { color: var(--text-primary); }

.nav__cta { margin-left: 0.5rem; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 300ms, opacity 300ms;
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile overlay */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height); left: 0; right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(44,18,0,0.1);
}
.nav__mobile.open { display: flex; }
.nav__mobile .nav__link {
  font-size: 17px;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.nav__mobile .btn { width: 100%; justify-content: center; margin-top: 0.75rem; }

.nav-spacer { height: var(--nav-height); }

@media (max-width: 768px) {
  .nav__links    { display: none; }
  .nav__hamburger { display: flex; }
}