/* ==============================================
   COMPONENT: Navbar
   Description: Sticky navigation header with mobile hamburger
   ============================================== */

/* --- Block --- */

.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-innovation-blue);
  box-shadow: var(--shadow-md);
}

/* --- Nav row (contains logo, hamburger, menu, cta) --- */

.navbar__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px; /* navbar height — used as reference for body offset if needed */
  gap: var(--space-4);
}

/* --- Logo --- */

.navbar__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--color-clinical-white);
}

.navbar__logo img {
  width: 140px;
  height: auto;
}

/* --- Hamburger — shown on mobile, hidden on desktop --- */

.navbar__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-clinical-white);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.navbar__hamburger:hover {
  background: rgba(255, 255, 255, 0.1);
}

.navbar__hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-clinical-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* Hamburger → X when active */
.navbar__hamburger.is-active .navbar__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__hamburger.is-active .navbar__hamburger-line:nth-child(2) {
  opacity: 0;
}

.navbar__hamburger.is-active .navbar__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Menu — hidden on mobile by default --- */

.navbar__menu {
  display: none;
  position: absolute;
  top: 64px; /* matches navbar height */
  left: 0;
  right: 0;
  flex-direction: column;
  background: var(--color-blue-dark);
  padding: var(--space-2) var(--container-padding) var(--space-6);
  list-style: none;
  margin: 0;
}

.navbar__menu.is-open {
  display: flex;
}

/* --- Menu items --- */

.navbar__menu-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar__menu-item:last-child {
  border-bottom: none;
}

/* --- Nav links --- */

.navbar__link {
  display: block;
  padding: var(--space-3) 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-fast);
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--color-vitality-orange);
}

/* --- CTA — not visible in mobile collapsed state, shown after menu items --- */

.navbar__cta {
  display: none;
}

/* --- Responsive — desktop layout --- */

@media (min-width: 1024px) {
  .navbar__nav {
    gap: var(--space-6);
  }

  .navbar__logo img {
    width: 160px;
  }

  /* Hide hamburger on desktop */
  .navbar__hamburger {
    display: none;
  }

  /* Show menu as horizontal row */
  .navbar__menu {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
    background: transparent;
    padding: 0;
    flex: 1;
    justify-content: flex-end;
  }

  .navbar__menu-item {
    border-bottom: none;
  }

  .navbar__link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.85);
  }

  .navbar__link:hover,
  .navbar__link--active {
    color: var(--color-clinical-white);
    border-bottom-color: var(--color-vitality-orange);
  }

  /* Show CTA button on desktop */
  .navbar__cta {
    display: inline-flex;
    flex-shrink: 0;
  }
}