/* Header component styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-obsidian);
  border-bottom: 1px solid var(--color-graphite);
  height: 64px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  width: 100%;
  max-width: var(--container-outer-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  height: 100%;
}

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

.site-header__brand:hover {
  color: var(--color-bone);
  text-decoration: none;
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-bone);
  white-space: nowrap;
}

.site-header__nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
  flex-shrink: 0;
}

.site-header__nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-bone);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

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

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

.site-header__nav-toggle:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

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

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

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.75rem;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-bone);
  text-decoration: none;
  white-space: nowrap;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-amber-soft);
  text-decoration: none;
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

.site-header__cta {
  flex-shrink: 0;
  white-space: nowrap;
}

/* Collision prevention: body padding equal to header height */
body {
  padding-top: 64px;
}

/* Mobile layout */
@media (max-width: 1279px) {
  .site-header__inner {
    gap: var(--space-md);
  }

  .site-header__nav-toggle {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-obsidian);
    padding: var(--space-lg) var(--container-padding-mobile);
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition-drawer);
    z-index: 999;
    display: block;
    flex: none;
  }

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

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

  .site-header__nav-link {
    display: block;
    padding: var(--space-sm) 0;
    font-size: 1rem;
    letter-spacing: 0.08em;
  }

  .site-header__cta {
    display: none;
  }
}

@media (min-width: 1280px) {
  .site-header__inner {
    gap: var(--space-lg);
  }

  .site-header__nav-toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    align-items: center;
    flex: 1;
  }

  .site-header__nav-list {
    gap: var(--space-md);
  }

  .site-header__cta {
    display: inline-flex;
    padding-inline: var(--space-md);
  }
}

@media (min-width: 1440px) {
  .site-header__inner {
    gap: var(--space-xl);
  }

  .site-header__nav-list {
    gap: var(--space-lg);
  }

  .site-header__cta {
    padding-inline: var(--space-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav {
    transition: none;
  }
}