/* ==========================================================================
   Navbar — sticky, transparent-over-hero, solid-on-scroll
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base),
    padding var(--transition-base);
}

.site-header .kp-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem var(--container-padding-x);
  max-width: 1440px;
  margin: 0 auto;
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: var(--shadow-sm);
}

.site-header.is-scrolled .kp-navbar {
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

/* Brand -------------------------------------------------------------------- */

.kp-navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-white);
  transition: color var(--transition-base);
}

.kp-navbar-brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.site-header.is-scrolled .kp-navbar-brand {
  color: var(--color-navy);
}

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

.kp-navbar-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.kp-nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-white);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-base);
}

.kp-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background-color: currentColor;
  transition: width var(--transition-fast);
}

.kp-nav-link:hover::after,
.kp-nav-link.is-active::after {
  width: 100%;
}

.site-header.is-scrolled .kp-nav-link {
  color: var(--color-text);
}

.nav-cta {
  background-color: var(--color-aegean);
  color: var(--color-white) !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  background-color: var(--color-navy);
  transform: translateY(-2px);
}

/* Language toggle -------------------------------------------------------- */

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-white);
  transition: color var(--transition-base);
}

.site-header.is-scrolled .lang-toggle {
  color: var(--color-text);
}

.lang-toggle button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-sm);
  opacity: 0.55;
  transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.lang-toggle button.is-active {
  opacity: 1;
  background-color: rgba(46, 111, 149, 0.12);
}

.lang-divider {
  opacity: 0.5;
}

/* Mobile toggler ----------------------------------------------------------- */

.kp-navbar-toggler {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.kp-navbar-toggler span {
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: background-color var(--transition-base), transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header.is-scrolled .kp-navbar-toggler span {
  background-color: var(--color-navy);
}

.kp-navbar-toggler[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.kp-navbar-toggler[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.kp-navbar-toggler[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 991.98px) {
  .kp-navbar-toggler {
    display: flex;
  }

  .kp-navbar-collapse {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  .kp-navbar-collapse.is-open {
    transform: translateX(0);
  }

  .kp-navbar-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    width: 100%;
  }

  .kp-nav-link,
  .lang-toggle {
    color: var(--color-text) !important;
  }

  .nav-cta {
    color: var(--color-white) !important;
  }
}