.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  gap: var(--space-4);
}

.site-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  color: var(--color-text);
}

.site-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.site-header__logo-mark i {
  font-size: 1.1rem;
}

.site-header__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  letter-spacing: 0.02em;
}

.site-header__nav {
  flex: 1 1 auto;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 999px;
  transition: width var(--transition-base);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-primary-dark);
}

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

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__icon-link {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-surface);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.site-header__icon-link:hover {
  color: var(--color-primary-dark);
  border-color: var(--color-primary-soft);
  background-color: var(--color-primary-soft);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

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

/* Mobile toggle */
.site-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-surface);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  position: absolute;
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
}

.site-header__toggle-icon {
  top: 50%;
  transform: translateY(-50%);
}

.site-header__toggle-icon::before {
  top: -0.35rem;
}

.site-header__toggle-icon::after {
  bottom: -0.35rem;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  bottom: 0;
  transform: rotate(-45deg);
}
 .site-header__toggle{
  display: none!important;
 }
/* Responsive layout */
@media (max-width: 768px) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-md);
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
    transform-origin: top;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-6) var(--space-6);
    gap: var(--space-4);
  }

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

  .site-header__nav {
    display: none;
  }

  .site-header__nav.is-open {
    display: block;
  }

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

  .site-header__actions {
    display: none;
  }
}

@media (min-width: 769px) {
  .site-header__nav {
    display: block !important;
  }
}