.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(247, 244, 239, 0.96), rgba(247, 244, 239, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.site-header__brand {
  display: flex;
  align-items: center;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  color: var(--color-text);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 14px;
  background: radial-gradient(circle at 30% 20%, #7da883 0, #2f6b4f 40%, #1f2421 85%);
  box-shadow: var(--shadow-md);
  position: relative;
}

.site-header__logo-mark::before {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: inherit;
  border: 1px solid rgba(247, 244, 239, 0.4);
}

.site-header__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__subtitle {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-24);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: rgba(47, 107, 79, 0.8);
  transition: width var(--transition-normal);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  width: 100%;
}

.site-header__nav-link--primary {
  padding: 0.45rem 1.2rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(47, 107, 79, 0.4);
}

.site-header__nav-link--primary::after {
  display: none;
}

.site-header__nav-link--primary:hover {
  background-color: #275843;
  text-decoration: none;
}

.site-header__nav-item--accent {
  margin-left: var(--space-8);
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(82, 76, 70, 0.16);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-text);
}

.site-header__toggle-box {
  position: relative;
  width: 18px;
  height: 14px;
}

.site-header__toggle-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-fast), top var(--transition-normal), bottom var(--transition-normal);
}

.site-header__toggle-line:first-child {
  top: 2px;
}

.site-header__toggle-line:last-child {
  bottom: 2px;
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Mobile Layout */

@media (max-width: 768px) {
  .site-header__inner {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  .site-header__subtitle {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: rgba(247, 244, 239, 0.98);
    box-shadow: 0 18px 40px rgba(24, 32, 22, 0.2);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-24) var(--space-16) var(--space-24);
    gap: var(--space-16);
  }

  .site-header__nav-link {
    font-size: var(--font-size-md);
  }

  .site-header__nav-item--accent {
    margin-left: 0;
    margin-top: var(--space-8);
    width: 100%;
  }

  .site-header__nav-link--primary {
    display: inline-flex;
    width: 100%;
    justify-content: center;
  }

  .site-header--menu-open .site-header__nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-header--menu-open .site-header__toggle-line:first-child {
    top: 6px;
    transform: rotate(42deg);
  }

  .site-header--menu-open .site-header__toggle-line:last-child {
    bottom: 6px;
    transform: rotate(-42deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav,
  .site-header__toggle-line {
    transition: none;
  }
}