.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  height: 60px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
  min-width: 0;
  flex-shrink: 0;
}

.site-header__logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base);
  flex-shrink: 0;
}

.site-header__toggle:hover {
  background-color: var(--bg-secondary);
}

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

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle-icon {
  position: relative;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.site-header__toggle-icon::before {
  top: -6px;
}

.site-header__toggle-icon::after {
  top: 6px;
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-header__nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-lifted);
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  z-index: 1001;
}

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

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-header__nav-list li {
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: block;
  padding: var(--space-md) var(--container-padding-mobile);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.site-header__nav-list a:hover,
.site-header__nav-list a:focus-visible {
  background-color: var(--bg-secondary);
  color: var(--accent-gold);
}

.site-header__nav-list a:focus-visible {
  outline: 3px solid var(--accent-blue);
  outline-offset: -3px;
}

@media (min-width: 1024px) {
  .site-header__inner {
    height: 80px;
    padding-inline: var(--container-padding-desktop);
  }

  .site-header__logo {
    width: 48px;
    height: 48px;
  }

  .site-header__brand-text {
    font-size: 1.5rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: block;
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    max-height: none;
    overflow: visible;
    z-index: auto;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-lg);
  }

  .site-header__nav-list a {
    padding: var(--space-sm) var(--space-xs);
    border-bottom: none;
    font-size: var(--text-small);
    font-weight: 600;
    white-space: nowrap;
    transition: color var(--transition-base);
  }

  .site-header__nav-list a:hover,
  .site-header__nav-list a:focus-visible {
    background-color: transparent;
    color: var(--accent-gold);
  }

  .site-header__nav-list a:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-icon,
  .site-header__toggle-icon::before,
  .site-header__toggle-icon::after,
  .site-header__nav-list a {
    transition: none;
  }
}