/*
 * Navigation Component
 * Handles site header, primary nav, logo, and mobile menu.
 * Tekvera Initiative Theme
 */

/* ── Site header shell ───────────────────────────────────────────────────── */
.tv-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--tv-z-sticky);
  height: var(--tv-nav-height);
  transition:
    background-color var(--tv-duration-slow) var(--tv-ease-default),
    box-shadow       var(--tv-duration-slow) var(--tv-ease-default);
  /* Default: transparent over hero */
  background-color: transparent;
}

/* Solid state — triggered by JS when page scrolls or on non-hero pages */
.tv-header.is-solid {
  background-color: var(--tv-white);
  box-shadow: var(--tv-shadow-sm);
}

/* Non-hero pages always solid */
.tv-header--always-solid {
  background-color: var(--tv-white);
  box-shadow: var(--tv-shadow-sm);
}

/* ── Inner nav bar ───────────────────────────────────────────────────────── */
.tv-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--tv-nav-height);
  gap: 2rem;
}

/* ── Logo ────────────────────────────────────────────────────────────────── */
.tv-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  text-decoration: none;
  line-height: 1;
}

.tv-logo__img {
  height: 42px;
  width: auto;
  display: block;
  transition: opacity var(--tv-duration-base) var(--tv-ease-default);
}

/* Light logo (on transparent/dark header) */
.tv-logo--light .tv-logo__img { display: block; }
.tv-logo--dark  .tv-logo__img { display: none; }

.tv-header.is-solid .tv-logo--light .tv-logo__img { display: none; }
.tv-header.is-solid .tv-logo--dark  .tv-logo__img { display: block; }

/* Fallback text logo (when no ACF image uploaded) */
.tv-logo__text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.tv-logo__name {
  font-family: var(--tv-font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--tv-white);
  letter-spacing: -0.01em;
  transition: color var(--tv-duration-base) var(--tv-ease-default);
}

.tv-logo__tagline {
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--tv-duration-base) var(--tv-ease-default);
}

.tv-header.is-solid .tv-logo__name    { color: var(--tv-green-800); }
.tv-header.is-solid .tv-logo__tagline { color: var(--tv-text-tertiary); }

/* ── Primary navigation ──────────────────────────────────────────────────── */
.tv-nav-primary {
  flex: 1;
  display: flex;
  justify-content: center;
}

.tv-nav-primary .tv-nav__list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.tv-nav__item {
  position: relative;
}

.tv-nav__link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.85rem;
  border-radius: var(--tv-radius-sm);
  font-size: 0.925rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 0.25px;
  text-decoration: none;
  transition:
    color            var(--tv-duration-fast) var(--tv-ease-default),
    background-color var(--tv-duration-fast) var(--tv-ease-default);
}

.tv-nav__link:hover {
  color: var(--tv-white);
  background-color: rgba(255, 255, 255, 0.09);
}

.tv-nav__item.is-current > .tv-nav__link {
  color: var(--tv-white);
  background-color: rgba(255, 255, 255, 0.12);
}

/* Solid header nav */
.tv-header.is-solid .tv-nav__link {
  color: var(--tv-text-secondary);
}

.tv-header.is-solid .tv-nav__link:hover {
  color: var(--tv-text-primary);
  background-color: var(--tv-cream);
}

.tv-header.is-solid .tv-nav__item.is-current > .tv-nav__link {
  color: var(--tv-green-700);
  background-color: var(--tv-green-50);
}

/* ── Dropdown chevron (on items with sub-menu) ────────────────────────────── */
.tv-nav__chevron {
  flex-shrink: 0;
  opacity: 0.7;
  margin-left: 0.15rem;
  transition:
    transform var(--tv-duration-base) var(--tv-ease-default),
    opacity   var(--tv-duration-fast) var(--tv-ease-default);
}

.tv-nav__link:hover .tv-nav__chevron,
.tv-nav__item.has-dropdown:focus-within > .tv-nav__link .tv-nav__chevron {
  opacity: 1;
}

/* Flip chevron when the dropdown is visible */
.tv-nav__item.has-dropdown:hover > .tv-nav__link .tv-nav__chevron,
.tv-nav__item.has-dropdown:focus-within > .tv-nav__link .tv-nav__chevron {
  transform: rotate(-180deg);
}

/* ── Dropdown sub-menu ────────────────────────────────────────────────────── */
.tv-nav__dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 200px;
  background: var(--tv-white);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-md);
  box-shadow: var(--tv-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition:
    opacity    var(--tv-duration-base) var(--tv-ease-default),
    transform  var(--tv-duration-base) var(--tv-ease-default),
    visibility var(--tv-duration-base) var(--tv-ease-default);
  z-index: var(--tv-z-dropdown);
  padding: 0.4rem;
}

.tv-nav__item.has-dropdown:hover > .tv-nav__dropdown,
.tv-nav__item.has-dropdown:focus-within > .tv-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.tv-nav__dropdown .tv-nav__link {
  color: var(--tv-text-secondary);
  font-size: 0.88rem;
  border-radius: var(--tv-radius-sm);
  display: block;
  width: 100%;
  padding: 0.5rem 0.85rem;
}

.tv-nav__dropdown .tv-nav__link:hover {
  color: var(--tv-green-700);
  background-color: var(--tv-green-50);
}

/* Active item inside the dropdown: green treatment on white panel */
.tv-nav__dropdown .tv-nav__item.is-current > .tv-nav__link {
  color: var(--tv-green-700);
  background-color: var(--tv-green-50);
}

/* ── Header CTA button ───────────────────────────────────────────────────── */
.tv-header__cta {
  flex-shrink: 0;
}

/* On transparent header, CTA is amber */
.tv-header:not(.is-solid) .tv-header__cta .tv-btn--amber {
  /* Default amber already works on dark */
}

/* ── Hamburger (mobile) ──────────────────────────────────────────────────── */
.tv-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  background: none;
  border: none;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background var(--tv-duration-fast);
}

.tv-hamburger:hover,
.tv-hamburger:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.tv-header.is-solid .tv-hamburger:hover,
.tv-header.is-solid .tv-hamburger:focus-visible {
  background: var(--tv-cream);
}

.tv-hamburger__bar {
  display: block;
  width: 25px;
  height: 1.85px;
  background-color: var(--tv-white);
  border-radius: 2px;
  transition:
    transform  var(--tv-duration-base) var(--tv-ease-default),
    opacity    var(--tv-duration-fast) var(--tv-ease-default),
    background var(--tv-duration-base) var(--tv-ease-default);
}

.tv-header.is-solid .tv-hamburger__bar {
  background-color: var(--tv-green-800);
}

/* Open state */
.tv-hamburger.is-open .tv-hamburger__bar:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}
.tv-hamburger.is-open .tv-hamburger__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.tv-hamburger.is-open .tv-hamburger__bar:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* ── Mobile nav overlay ──────────────────────────────────────────────────── */
.tv-mobile-nav {
  position: fixed;
  inset: 0;
  background-color: var(--tv-green-950);
  z-index: var(--tv-z-overlay);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 4rem 1.5rem;
  opacity: 0;
  visibility: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition:
    opacity    var(--tv-duration-slow) var(--tv-ease-default),
    visibility var(--tv-duration-slow) var(--tv-ease-default);
}

.tv-mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
}

/* Reset browser default list padding/margin and centre-align links */
.tv-mobile-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  width: 100%;
  max-width: 420px;
}

.tv-mobile-nav__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  background: none;
  border: none;
  border-radius: 50%;
  transition:
    color      var(--tv-duration-fast),
    background var(--tv-duration-fast);
}

.tv-mobile-nav__close:hover,
.tv-mobile-nav__close:focus-visible {
  color: var(--tv-white);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.tv-mobile-nav__link {
  font-family: var(--tv-font-serif);
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition:
    color     var(--tv-duration-base) var(--tv-ease-default),
    transform var(--tv-duration-base) var(--tv-ease-spring);
  display: block;
  padding: 0.45rem 0.5rem;
  text-align: center;
  min-height: 44px;
}

.tv-mobile-nav__link:hover,
.tv-mobile-nav__link:focus-visible {
  color: var(--tv-white);
  outline: none;
}

.tv-mobile-nav__cta {
  margin-top: 1.5rem;
}

/* Lock scroll on body when mobile nav is open */
body.has-mobile-nav-open {
  overflow: hidden;
}

/* ── Logo switching (extracted from site-header.php) ─────────────────────── */
.tv-logo__img--light { display: block; }
.tv-logo__img--dark  { display: none;  }

.tv-header.is-solid .tv-logo__img--light { display: none;  }
.tv-header.is-solid .tv-logo__img--dark  { display: block; }

.tv-header--always-solid .tv-logo__img--light { display: none;  }
.tv-header--always-solid .tv-logo__img--dark  { display: block; }

/* ── Skip link ───────────────────────────────────────────────────────────── */
.tv-skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--tv-green-800);
  color: var(--tv-white);
  border-radius: 0 0 var(--tv-radius-sm) var(--tv-radius-sm);
  font-size: var(--tv-text-sm);
  font-weight: 600;
  transition: top 0.2s;
}
.tv-skip-link:focus { top: 0; }

/* ── Responsive: hide desktop nav on mobile ──────────────────────────────── */
@media (max-width: 900px) {
  .tv-nav-primary,
  .tv-header__cta { display: none; }
  .tv-hamburger   { display: flex; }

  /* Tighter inner header gap on mobile (logo ↔ hamburger) */
  .tv-header__inner { gap: 1rem; }
  .tv-logo__img     { height: 36px; }
}

@media (max-width: 480px) {
  .tv-mobile-nav      { padding: 3.5rem 1rem; }
  .tv-mobile-nav__link { font-size: 1.45rem; padding: 0.35rem 0.5rem; }
  .tv-logo__img        { height: 32px; }
  .tv-logo__name       { font-size: 1.05rem; }
  .tv-logo__tagline    { font-size: 0.54rem; }
}