.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-dark-slate);
  border-bottom: 1px solid var(--color-copper);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.site-header__inner {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 64px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-pure-white);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__brand:hover {
  color: var(--color-warm-amber);
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none !important;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-list a {
  display: inline-block;
  padding: var(--space-2) 0;
  color: var(--color-pure-white);
  font-size: var(--text-body-size);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-list a:hover {
  color: var(--color-warm-amber);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  background-color: transparent;
  border: 1px solid var(--color-copper);
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: var(--color-warm-amber);
  background-color: rgba(255, 179, 71, 0.08);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-pure-white);
  border-radius: 1px;
  transition: background-color var(--transition-fast), transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle:hover .nav-toggle__bar {
  background-color: var(--color-warm-amber);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 900px) {
  .site-header {
    padding-top: calc(14px + env(safe-area-inset-top, 0px));
    padding-bottom: 12px;
  }

  .site-header__inner {
    flex-wrap: wrap;
    min-height: 64px;
  }

  .site-header__brand {
    flex: 1 1 auto;
    min-width: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header__nav {
    flex-basis: 100%;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    background-color: var(--color-dark-slate);
    border-top: 1px solid transparent;
  }

  .site-header__nav.is-open {
    max-height: 400px;
    border-top-color: var(--color-copper);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3) 0;
  }

  .site-header__nav-list li {
    width: 100%;
  }

  .site-header__nav-list a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid rgba(184, 115, 51, 0.2);
  }

  .site-header__nav-list li:last-child a {
    border-bottom: none;
  }
}

@media (max-width: 480px) {
  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-text {
    font-size: 1rem;
  }
}