/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(224, 230, 232, 0.5);
  transition: all var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-img {
  height: 55px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo-tagline {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-top: -2px;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 0.85rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-wa {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-whatsapp);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
}

.header-wa:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 10px rgba(37, 211, 102, 0.4);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  padding: var(--space-lg) var(--space-md);
  z-index: 1050;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition);
  overflow-y: auto;
}

.mobile-nav.open {
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav a {
  display: block;
  padding: 1rem 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--color-primary);
  padding-left: 0.75rem;
}

.mobile-nav .btn {
  margin-top: var(--space-md);
  width: 100%;
  justify-content: center;
}

/* ──── Responsive ──── */
@media (max-width: 1024px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  .mobile-nav { display: block; }
  .mobile-nav:not(.open) { display: none; }
}

@media (max-width: 480px) {
  .logo-tagline { display: none; }
  .header-wa { display: none; }
}