/* Header component styles */
.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--surface-primary);
  border-bottom: var(--border-thin) solid var(--color-copper-500);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 4.5rem;
  padding-block: var(--space-sm);
}

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

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

.site-header__logo {
  width: 3rem;
  height: 3rem;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--text-h4);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.3125rem;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.5rem;
  background: transparent;
  border: var(--border-thin) solid var(--color-copper-500);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--surface-secondary);
  border-color: var(--color-copper-300);
}

.site-header__toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-header__toggle-line {
  display: block;
  width: 1.25rem;
  height: 0.125rem;
  background-color: var(--color-copper-500);
  border-radius: 0.0625rem;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.4375rem) 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(-0.4375rem) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

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

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

.site-header__nav-item + .site-header__nav-item {
  margin-top: 0;
}

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-xs) 0;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  line-height: 1.4;
  letter-spacing: 0.0625em;
  text-transform: uppercase;
  color: var(--color-ivory-100);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast);
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.0625rem;
  background-color: var(--color-copper-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

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

.site-header__nav-link:hover::after {
  transform: scaleX(1);
}

.site-header__nav-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-card);
}

@media (max-width: 64rem) {
  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
    background-color: var(--surface-primary);
    border-bottom: var(--border-thin) solid var(--color-copper-500);
    padding: var(--space-md) var(--container-gutter);
    display: none;
    z-index: 999;
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header__nav-item + .site-header__nav-item {
    border-top: var(--border-thin) solid var(--color-charcoal-700);
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-sm) 0;
    font-size: var(--text-body);
    letter-spacing: 0.0625em;
  }

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

@media (max-width: 48rem) {
  .site-header__inner {
    min-height: 4rem;
    padding-block: var(--space-xs);
  }

  .site-header__logo {
    width: 2.5rem;
    height: 2.5rem;
  }

  .site-header__brand-text {
    font-size: var(--text-body);
  }

  .site-header__nav {
    max-height: calc(100vh - 4rem);
  }
}