/* ==========================================================================
   Header — sticky top navigation
   Logo · primary nav · phone · Request Info CTA · Current Students · mobile menu
   A11Y: <header><nav aria-label="Primary"> landmark; hamburger toggles
   aria-expanded; menu closes on Escape and on outside click (mobile-nav.js).
   ========================================================================== */
/* Top utility bar — sits above the main nav and scrolls away while the header
   stays sticky. Hosts the My Laurus Portal link. */
.utility-bar { background: var(--color-navy-900); }
.utility-bar__inner {
  display: flex; align-items: center; gap: var(--space-2) var(--space-3);
  min-height: 44px;
}
/* Promotional message (left) — shown on desktop where there's room. */
.utility-promo {
  display: none;
  align-items: center; gap: 0.5rem;
  margin: 0; font-size: var(--text-sm);
  color: var(--color-text-on-dark-muted);
  white-space: nowrap;       /* keep the promo on a single line */
}
.utility-promo > .icon { color: #ffd9a3; flex-shrink: 0; }
.utility-promo a {
  display: inline-flex; align-items: center; gap: 0.3rem;
  color: #ffffff; font-weight: var(--weight-semibold); text-decoration: none; white-space: nowrap;
}
.utility-promo a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.utility-promo a .icon { color: #ffd9a3; }
/* Right group (phone + portal), always pushed to the right edge. */
.utility-bar__right { margin-left: auto; display: flex; align-items: center; gap: var(--space-3); }
.utility-phone {
  display: none;
  align-items: center; gap: 0.4rem;
  color: #ffffff; text-decoration: none;
  font-size: var(--text-sm); font-weight: var(--weight-medium); white-space: nowrap;
}
.utility-phone .icon { color: #ffd9a3; }
.utility-phone:hover { text-decoration: underline; text-underline-offset: 0.2em; }
@media (min-width: 768px) { .utility-phone { display: inline-flex; } }
@media (min-width: 1100px) { .utility-promo { display: inline-flex; } }
.utility-portal {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.35rem 0.95rem;
  border: 1px solid rgb(255 255 255 / 0.4);
  border-radius: var(--radius-full);
  color: #ffffff; text-decoration: none;
  font-size: var(--text-sm); font-weight: var(--weight-semibold);
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.utility-portal .icon { color: #ffd9a3; transition: color var(--duration-fast) var(--ease-out); }
.utility-portal:hover { background: #ffffff; border-color: #ffffff; color: var(--color-primary); }
.utility-portal:hover .icon { color: var(--color-primary); }
/* A11Y: white focus ring for contrast on the dark utility bar. */
.utility-portal:focus-visible { outline: 3px solid #ffffff; outline-offset: 2px; }

/* The whole top region (utility bar + main nav) is persistent/sticky together. */
.site-top {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}
.site-header {
  background: rgb(255 255 255 / 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--header-height);
}

/* Logo ----------------------------------------------------------------- */
.site-header__logo { display: inline-flex; align-items: center; flex-shrink: 0; }
.site-header__logo img { height: 40px; width: auto; }
.site-header__logo:focus-visible { outline-offset: 4px; }

/* Primary nav ---------------------------------------------------------- */
.primary-nav { display: none; } /* shown ≥1024px */
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-2), 1.6vw, var(--space-4));
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}
.primary-nav__link::after {
  /* Hover/active underline — orange accent kept as a thin 2px line only. */
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}
.primary-nav__link:hover { color: var(--color-primary); }
.primary-nav__link:hover::after { transform: scaleX(1); }
/* aria-current="page" marks the active page — not color-only: also bold. */
.primary-nav__link[aria-current='page'] {
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
}
.primary-nav__link[aria-current='page']::after { transform: scaleX(1); }

/* Dropdown (Programs) -------------------------------------------------- */
.has-dropdown { position: relative; }
.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  padding: 0.5rem 0;
}
.dropdown-toggle .icon { transition: transform var(--duration-fast) var(--ease-out); }
.dropdown-toggle[aria-expanded='true'] .icon { transform: rotate(180deg); }
.dropdown-panel {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 460px;
  padding: var(--space-2);
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              visibility var(--duration-fast);
}
.dropdown-toggle[aria-expanded='true'] + .dropdown-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
}
.dropdown-link {
  display: block;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
}
.dropdown-link:hover { background: var(--color-surface); }
.dropdown-link strong { display: block; font-size: var(--text-sm); color: var(--color-primary); }
.dropdown-link span { font-size: var(--text-xs); color: var(--color-text-muted); }
.dropdown-foot {
  margin-top: var(--space-1);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
}

/* Header actions (phone + CTA) ---------------------------------------- */
.site-header__actions { display: flex; align-items: center; gap: var(--space-2); }
.header-phone {
  display: none; /* shown ≥768px */
  align-items: center;
  gap: 0.4rem;
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.header-phone .icon { color: var(--color-accent); }
.header-phone:hover { color: var(--color-accent-hover); }
.header-cta { display: none; } /* shown ≥768px; mobile uses sticky bar */

/* Hamburger ------------------------------------------------------------ */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  color: var(--color-primary);
}
.nav-toggle:hover { background: var(--color-surface); }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded='true'] .icon-menu { display: none; }
.nav-toggle[aria-expanded='true'] .icon-close { display: block; }

/* Mobile drawer -------------------------------------------------------- */
.mobile-menu {
  position: fixed;
  inset: var(--sticky-top) 0 0 0;
  z-index: var(--z-header);
  background: #ffffff;
  padding: var(--space-3) var(--gutter) var(--space-8);
  overflow-y: auto;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--duration-normal) var(--ease-out), visibility var(--duration-normal);
}
.mobile-menu[data-open='true'] { transform: translateX(0); visibility: visible; }
.mobile-menu__list { list-style: none; margin: 0; padding: 0; }
.mobile-menu__list li { border-bottom: 1px solid var(--color-border); }
.mobile-menu__link {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  text-decoration: none;
}
.mobile-menu__link[aria-current='page'] { color: var(--color-accent-hover); font-weight: var(--weight-semibold); }
.mobile-menu__sub { padding-left: var(--space-2); }
.mobile-menu__sub a { font-size: var(--text-base); padding: var(--space-1) 0; display: block; color: var(--color-text-muted); text-decoration: none; }
.mobile-menu__actions { margin-top: var(--space-4); display: grid; gap: var(--space-2); }
.mobile-menu__phone {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-weight: var(--weight-semibold); color: var(--color-primary); text-decoration: none;
  min-height: 48px;
}

/* Backdrop behind drawer */
.nav-backdrop {
  position: fixed; inset: 0; z-index: calc(var(--z-header) - 1);
  background: rgb(8 33 65 / 0.4);
  opacity: 0; visibility: hidden;
  transition: opacity var(--duration-normal);
}
.nav-backdrop[data-open='true'] { opacity: 1; visibility: visible; }

/* Responsive ----------------------------------------------------------- */
@media (min-width: 768px) {
  .header-phone, .header-cta { display: inline-flex; }
}
@media (min-width: 1024px) {
  .primary-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-menu, .nav-backdrop { display: none; }
}

/* Lock body scroll while the mobile drawer is open (set by mobile-nav.js). */
body.nav-open { overflow: hidden; }