/* ===== Header Scoped Styles ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: var(--border-solid);
  padding-block: var(--spacing-03);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-04);
  flex-wrap: nowrap;
}

/* Brand */
.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-02);
  text-decoration: none;
  color: var(--color-text-primary);
  flex-shrink: 0;
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border: none;
  filter: none;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.2;
  white-space: nowrap;
}

/* Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: var(--border-solid);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  gap: 5px;
  flex-shrink: 0;
}

.nav-toggle__line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

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

.nav-toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* Primary Navigation */
.site-nav {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-04);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item {
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-primary);
  text-decoration: none;
  padding: var(--spacing-01) 0;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-accent-blue);
  text-decoration: underline;
}

.site-nav__link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* Mobile Styles */
@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: var(--border-solid);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    z-index: 999;
  }

  .site-nav[aria-hidden="false"] {
    max-height: 80vh;
    overflow-y: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--spacing-04);
  }

  .site-nav__item {
    border-bottom: 1px solid var(--color-text-primary);
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    display: block;
    padding: var(--spacing-03) 0;
    font-size: 1.125rem;
  }
}

/* Desktop: ensure nav is visible and toggle hidden */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--spacing-04);
  }

  .site-nav__item {
    border-bottom: none;
  }

  .site-nav__link {
    padding: 0;
  }
}