.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
  animation: slideDown 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.header.scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-logo {
  height: 80px;
  width: auto;
  object-fit: contain;
}

/* Desktop Nav */
.nav-desktop {
  flex: 1;
}

.nav-desktop ul {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
}

.nav-desktop a {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  transition:
    color var(--transition),
    background var(--transition);
  white-space: nowrap;
}

.nav-desktop a:hover {
  color: var(--teal);
  background: var(--teal-light);
}

.btn-nav {
  flex-shrink: 0;
  font-size: 0.875rem;
  padding: 10px 20px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

.hamburger span:nth-child(2).open {
  opacity: 0;
}

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

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  padding: 16px 0 24px;
  box-shadow: var(--shadow-lg);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 24px;
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-800);
  cursor: pointer;
  transition: all var(--transition);
}

.mobile-menu a:hover {
  color: var(--teal);
  background: var(--teal-light);
}

.mobile-menu .mobile-cta {
  margin-top: 12px;
  text-align: center;
  justify-content: center;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-desktop,
  .btn-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}