/* ==============================================
   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: 96px; /* 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 {
  height: 72px; /* height-constrained — SVG is portrait (146×201); auto width maintains ratio */
  width: auto;
}

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

.navbar__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px; /* visual tuning for hamburger lines — between token sizes */
  order: 3; /* always last in flex row — CTA sits between logo and hamburger */
  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: 96px; /* 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 — always visible in the navbar bar; compact on mobile --- */

.navbar__cta {
  display: inline-flex;
  flex-shrink: 0;
  order: 2; /* sits between logo (order 0) and hamburger (order 3) */
  margin-left: auto; /* pushes CTA+hamburger to the right edge */
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}

/* Label text — short on small mobile, full label from 480px */
.navbar__cta-text--short { display: inline; }
.navbar__cta-text--full  { display: none; }

/* --- Responsive: 480px — restore logo width, switch to full CTA label --- */

@media (min-width: 480px) {
  .navbar__logo img {
    height: 80px;
  }

  .navbar__cta-text--short { display: none; }
  .navbar__cta-text--full  { display: inline; }
}

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

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

  .navbar__logo img {
    height: 88px;
  }

  /* 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);
  }

  /* Restore full button sizing on desktop */
  .navbar__cta {
    margin-left: 0; /* menu's flex:1 handles the spacing */
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }
}

/* ==============================================
   DROPDOWN GROUPS
   ============================================== */

/* --- Group item (li wrapper) --- */

.navbar__group {
  position: relative;
}

/* --- Group trigger button --- */

.navbar__group-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  width: 100%;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family-base);
  cursor: pointer;
  transition: color var(--transition-fast);
}

/* CSS chevron via ::after — no sprite dependency */
.navbar__group-btn::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.navbar__group-btn[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

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

/* --- Dropdown panel — mobile: inline accordion --- */

.navbar__dropdown {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0 0 var(--space-2) var(--space-4);
}

.navbar__dropdown.is-open {
  display: block;
}

/* --- Dropdown links — mobile --- */

.navbar__dropdown-link {
  display: block;
  padding: var(--space-2) 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-regular);
  transition: color var(--transition-fast);
}

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

/* --- Desktop dropdown overrides --- */

@media (min-width: 1024px) {
  .navbar__group-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm);
    width: auto;
  }

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

  /* Floating panel on desktop */
  .navbar__dropdown {
    position: absolute;
    top: calc(100% + var(--space-1));
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: var(--color-clinical-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2) 0;
    z-index: var(--z-dropdown);
  }

  .navbar__dropdown-link {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    transition: background var(--transition-fast), color var(--transition-fast);
  }

  .navbar__dropdown-link:hover {
    background: var(--color-blue-light);
    color: var(--color-innovation-blue);
  }

  .navbar__dropdown-link--active {
    background: var(--color-blue-light);
    color: var(--color-innovation-blue);
    font-weight: var(--font-weight-bold);
  }
}