/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
  background: var(--color-forest);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: 1.1rem;
}

/* Logo — final approved mark (assets/logo/kai-logo-full.png), transparent background */
.logo {
  display: inline-flex;
  align-items: center;
}

.logo__mark {
  height: 34px;
  width: auto;
  display: block;
}

/* Desktop — modest size increase only; mobile footprint above is preserved as-is */
@media (min-width: 901px) {
  .logo__mark {
    height: 46px;
  }
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav__list a {
  color: var(--color-white);
  font-size: var(--fs-small);
  font-weight: 500;
  padding-block: 0.4rem;
  position: relative;
}

.main-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration) var(--ease);
}

.main-nav__list a:hover::after,
.main-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  color: var(--color-white);
}

.nav-toggle__bars {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: transform var(--duration) var(--ease);
}

.nav-toggle__bars::before { top: -7px; }
.nav-toggle__bars::after { top: 7px; }

@media (max-width: 900px) {
  .header-cta { display: none; }

  .nav-toggle { display: inline-flex; }

  .main-nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 84vw);
    background: var(--color-forest);
    transform: translateX(100%);
    transition: transform var(--duration) var(--ease);
    padding: 6rem var(--space-lg) var(--space-lg);
  }

  .main-nav.is-open {
    transform: translateX(0);
  }

  .main-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .main-nav .header-cta {
    display: inline-flex;
    margin-top: var(--space-lg);
  }

  body.nav-open {
    overflow: hidden;
  }
}