/* Header-specific styles building on base.css */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(247, 247, 248, 0.98);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height-desktop);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-display);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.12em;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__brand-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  padding-bottom: 2px;
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
  width: 100%;
}

.nav__item--cta .nav__link--cta {
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(75, 96, 79, 0.18);
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(75, 96, 79, 0.35);
}

.nav__item--cta .nav__link--cta::after {
  display: none;
}

.nav__item--cta .nav__link--cta:hover,
.nav__item--cta .nav__link--cta:focus-visible {
  background-color: var(--color-primary-strong);
  color: #ffffff;
}

/* Mobile navigation ------------------------------------------------------ */

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  cursor: pointer;
}

.nav-toggle__box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle__line {
  width: 18px;
  height: 1.5px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle__label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.nav-toggle.is-open .nav-toggle__line:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle__line:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* Layout for small screens: nav collapsed */

@media (max-width: 768px) {
  .site-header__inner {
    height: auto;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
  }

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

  .nav {
    position: absolute;
    inset: calc(100% + 1px) 0 auto 0;
    background-color: rgba(247, 247, 248, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-soft);
    display: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--layout-gutter) var(--space-6);
    gap: var(--space-4);
  }

  .nav--open {
    display: block;
  }

  .nav__item--cta .nav__link--cta {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle__line {
    transition: none;
  }
}