/* ================================================================
   km/navigation — Frontend styles
   Add to utilities.css (or load as separate stylesheet)
================================================================= */

/* ── Custom properties (override with design tokens) ─────────────
   Set these in :root or on the .km-nav element itself via class.
   ─────────────────────────────────────────────────────────────── */
:root {
  --km-nav-height:   64px;
  --km-nav-bg:       #ffffff;
  --km-nav-border:   1px solid #e2e8f0;
  --km-nav-color:    #1e293b;
  --km-nav-px:       1.5rem;
  --km-nav-z:        200;
  --km-nav-transition: background .25s ease, box-shadow .25s ease;
}

/* ── Wrapper / sticky ─────────────────────────────────────────── */
.km-nav {
  display: flex;
  align-items: stretch;
  background: var(--km-nav-bg);
  border-bottom: var(--km-nav-border);
  min-height: var(--km-nav-height);
  position: relative;
  z-index: var(--km-nav-z);
  width: 100%;
  box-sizing: border-box;
  transition: var(--km-nav-transition);
}

.km-nav--sticky {
  position: sticky;
  top: 0;
}

/* Transparent variant — becomes solid on scroll via JS class swap */
.km-nav--transparent {
  background: transparent;
  border-bottom-color: transparent;
  --km-nav-color: #fff;
}
.km-nav--transparent.is-scrolled {
  background: var(--km-nav-bg);
  border-bottom: var(--km-nav-border);
  --km-nav-color: #1e293b;
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
}

/* ── Inner ────────────────────────────────────────────────────── */
.km-nav__inner {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: var(--km-max-width, 1280px);
  margin: 0 auto;
  padding: 0 var(--km-nav-px);
  gap: 2rem;
  position: relative;
}

/* ── Logo ─────────────────────────────────────────────────────── */
.km-nav__logo { flex-shrink: 0; line-height: 0; }
.km-nav__logo-img { display: block; height: auto; max-height: calc(var(--km-nav-height) - 24px); }
.km-nav__logo a { display: block; text-decoration: none; }

/* ── Desktop items ────────────────────────────────────────────── */
.km-nav__items {
  display: flex;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
  flex: 1;
}

.km-nav__item {
  position: static; /* mega menus are full-width; items are relative */
  display: flex;
  align-items: stretch;
}

.km-nav__link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--km-nav-color);
  text-decoration: none;
  white-space: nowrap;
  transition: color .15s;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  min-height: var(--km-nav-height);
}
.km-nav__link:hover,
.km-nav__item--open > .km-nav__link,
.km-nav__item.current-menu-item > .km-nav__link,
.km-nav__item.current-menu-ancestor > .km-nav__link {
  color: var(--km-primary, #2563eb);
}

.km-nav__chevron {
  font-size: 9px;
  opacity: 0.6;
  transition: transform .2s;
  pointer-events: none;
}
.km-nav__item--open > .km-nav__link .km-nav__chevron { transform: rotate(180deg); }

/* ── Regular dropdown ─────────────────────────────────────────── */
.km-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,.1);
  padding: 6px 0;
  list-style: none;
  margin: 0;
  z-index: calc(var(--km-nav-z) + 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  pointer-events: none;
}
.km-nav__item--has-children:hover > .km-nav__dropdown,
.km-nav__item--open > .km-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(2px);
  pointer-events: auto;
}

.km-nav__dropdown-item { display: block; }
.km-nav__dropdown-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-size: 13.5px;
  color: #1e293b;
  text-decoration: none;
  transition: background .12s, color .12s;
  white-space: nowrap;
}
.km-nav__dropdown-link:hover {
  background: #f1f5f9;
  color: var(--km-primary, #2563eb);
}

/* Nested third level */
.km-nav__dropdown .km-nav__dropdown { top: 0; left: 100%; }

/* ── Mega menu ────────────────────────────────────────────────── */
.km-nav__mega {
  position: absolute;
  top: 100%;
  left: calc(-1 * var(--km-nav-px));
  right: calc(-1 * var(--km-nav-px));
  background: #fff;
  border: 1px solid #e2e8f0;
  border-top: none;
  box-shadow: 0 12px 40px rgba(0,0,0,.1);
  z-index: calc(var(--km-nav-z) + 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  pointer-events: none;
}
.km-nav__item--has-mega:hover > .km-nav__mega,
.km-nav__item--open > .km-nav__mega {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
.km-nav__mega-inner {
  max-width: var(--km-max-width, 1280px);
  margin: 0 auto;
  padding: var(--km-nav-px);
}

/* ── CTA / extra slot at end of nav ──────────────────────────── */
.km-nav__cta {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* ── Mobile toggle ────────────────────────────────────────────── */
.km-nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--km-nav-color);
  transition: opacity .15s;
  border-radius: 6px;
  margin-left: auto;
}
.km-nav__mobile-toggle:hover { opacity: .7; }
.km-nav__mobile-toggle:focus-visible { outline: 2px solid var(--km-primary, #2563eb); }

.km-nav__hamburger,
.km-nav__hamburger::before,
.km-nav__hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .22s ease, opacity .15s;
}
.km-nav__hamburger {
  position: relative;
}
.km-nav__hamburger::before,
.km-nav__hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}
.km-nav__hamburger::before { top: -7px; }
.km-nav__hamburger::after  { top:  7px; }

/* ✕ state when drawer is open */
.km-nav__mobile-toggle[aria-expanded="true"] .km-nav__hamburger { background: transparent; }
.km-nav__mobile-toggle[aria-expanded="true"] .km-nav__hamburger::before {
  transform: translateY(7px) rotate(45deg);
}
.km-nav__mobile-toggle[aria-expanded="true"] .km-nav__hamburger::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Overlay (mobile drawer backdrop) ────────────────────────── */
.km-nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--km-overlay-color, rgba(0,0,0,.5));
  z-index: calc(var(--km-nav-z) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s;
}
.km-nav-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* ── Mobile drawer ────────────────────────────────────────────── */
.km-nav__drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 88vw);
  background: #fff;
  z-index: var(--km-nav-z);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform .28s cubic-bezier(.4,0,.2,1);
  padding: 0 0 40px;
  box-shadow: -8px 0 40px rgba(0,0,0,.12);
  display: flex;
  flex-direction: column;
}
.km-nav__drawer.is-open { transform: translateX(0); }

.km-nav__drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #f1f5f9;
  min-height: 60px;
  flex-shrink: 0;
}
.km-nav__drawer-close {
  background: none;
  border: none;
  font-size: 20px;
  line-height: 1;
  color: #64748b;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: background .12s;
}
.km-nav__drawer-close:hover { background: #f1f5f9; color: #1e293b; }

.km-nav__mobile-items {
  list-style: none;
  margin: 0;
  padding: 8px 0;
  flex: 1;
}
.km-nav__mobile-item { border-bottom: 1px solid #f8fafc; }
.km-nav__mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 500;
  color: #1e293b;
  text-decoration: none;
  transition: background .12s;
}
.km-nav__mobile-link:hover { background: #f8fafc; }
.km-nav__mobile-link.is-open { color: var(--km-primary, #2563eb); }

.km-nav__mobile-chevron {
  font-size: 10px;
  opacity: 0.5;
  transition: transform .18s;
}
.km-nav__mobile-link.is-open .km-nav__mobile-chevron { transform: rotate(180deg); }

.km-nav__mobile-sub {
  list-style: none;
  margin: 0;
  padding: 0 0 4px 0;
  background: #f8fafc;
}
.km-nav__mobile-sub-link {
  display: block;
  padding: 10px 20px 10px 32px;
  font-size: 14px;
  color: #475569;
  text-decoration: none;
  transition: color .12s;
}
.km-nav__mobile-sub-link:hover { color: var(--km-primary, #2563eb); }

/* Mobile dropdown style (alt. to drawer) */
.km-nav__mobile-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 1px solid #e2e8f0;
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  z-index: calc(var(--km-nav-z) + 1);
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(-4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s, transform .2s, visibility .2s;
  pointer-events: none;
}
.km-nav__mobile-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* ── Responsive: collapse to mobile ──────────────────────────────
   Breakpoints generated by PHP / utility system.
   Base: always show desktop. Each .km-nav--mobile-{bp} hides
   the desktop items below the matching breakpoint.
   ─────────────────────────────────────────────────────────────── */

/* Default: all viewports — desktop items hidden if mobile class set */
@media (max-width: 1023px) {
  .km-nav--mobile-lg .km-nav__items      { display: none; }
  .km-nav--mobile-lg .km-nav__mobile-toggle { display: flex; }
  .km-nav--mobile-lg .km-nav__cta        { display: none; }
}
@media (min-width: 1024px) {
  .km-nav__drawer { display: none; }
}

@media (max-width: 767px) {
  .km-nav--mobile-md .km-nav__items      { display: none; }
  .km-nav--mobile-md .km-nav__mobile-toggle { display: flex; }
}
@media (min-width: 768px) {
  .km-nav--mobile-md .km-nav__drawer { display: none; }
}

@media (max-width: 479px) {
  .km-nav--mobile-sm .km-nav__items      { display: none; }
  .km-nav--mobile-sm .km-nav__mobile-toggle { display: flex; }
}
@media (min-width: 480px) {
  .km-nav--mobile-sm .km-nav__drawer { display: none; }
}

@media (max-width: 1279px) {
  .km-nav--mobile-xl .km-nav__items      { display: none; }
  .km-nav--mobile-xl .km-nav__mobile-toggle { display: flex; }
}
@media (min-width: 1280px) {
  .km-nav--mobile-xl .km-nav__drawer { display: none; }
}

/* ── Focus / accessibility ────────────────────────────────────── */
.km-nav__link:focus-visible,
.km-nav__dropdown-link:focus-visible,
.km-nav__mobile-link:focus-visible {
  outline: 2px solid var(--km-primary, #2563eb);
  outline-offset: 2px;
  border-radius: 3px;
}