/* Header component styles */
.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-plum-900);
  color: var(--color-cream-100);
  border-bottom: 1px solid var(--color-plum-700);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter-mobile);
  min-height: 64px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  text-decoration: none;
  color: var(--color-cream-100);
  flex-shrink: 0;
}

.site-header__logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  display: block;
}

.site-header__wordmark {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--color-cream-100);
  white-space: nowrap;
}

.site-header__nav {
  display: none;
  flex: 1 1 auto;
}

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

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-8) 0;
  font-family: var(--font-body);
  font-size: var(--text-small-size);
  line-height: var(--text-small-line-height);
  letter-spacing: 0.02em;
  color: var(--color-cream-100);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--color-copper-300);
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--color-copper-300);
  outline-offset: 2px;
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-copper-300);
  border-bottom: 1px solid var(--color-copper-300);
}

.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-cream-100);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) {
  opacity: 0;
}

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

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-copper-300);
  outline-offset: 2px;
}

/* Mobile navigation drawer */
@media (max-width: 767px) {
  .site-header__nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background-color: var(--color-plum-900);
    padding: var(--space-24) var(--gutter-mobile);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    box-shadow: var(--shadow-overlay);
    transform: translateX(100%);
    transition: transform var(--transition-medium);
  }

  .site-header__nav.is-open {
    transform: translateX(0);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-8);
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-12) var(--space-8);
    font-size: var(--text-h3-size);
    line-height: var(--text-h3-line-height);
    font-family: var(--font-heading);
    border-bottom: 1px solid var(--color-plum-700);
  }

  .site-header__nav-link[aria-current="page"] {
    border-bottom-color: var(--color-copper-300);
  }
}

/* Desktop navigation */
@media (min-width: 768px) {
  .site-header__inner {
    min-height: 72px;
    padding-inline: var(--gutter-tablet);
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__wordmark {
    font-size: 1.5rem;
  }

  .site-header__nav {
    display: flex;
  }

  .site-header__toggle {
    display: none;
  }
}

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

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