/* Header Layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-wood-light);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
}

/* Logo */
.site-logo {
  text-decoration: none;
  color: var(--color-charcoal);
  display: flex;
  align-items: center;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 60;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-charcoal);
  transition: transform 0.3s ease, opacity 0.3s ease;
  border-radius: 1px;
}

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

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

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

/* Navigation */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-sage);
  transition: width var(--transition-base);
}

.nav-list a:hover {
  color: var(--color-primary);
}

.nav-list a:hover::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-left: var(--space-4);
  border-left: 1px solid var(--color-wood-light);
  padding-left: var(--space-4);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  color: var(--color-charcoal);
  background-color: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  font-size: var(--text-lg);
}

.icon-btn:hover {
  background-color: var(--color-cream-dark);
  color: var(--color-primary);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: 5rem;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-cream);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6);
    gap: var(--space-8);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    border-top: 1px solid var(--color-wood-light);
  }

  .primary-nav.is-open {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--space-4);
  }

  .nav-list a {
    font-size: var(--text-xl);
    text-transform: none;
    font-weight: 400;
    font-family: var(--font-serif);
  }

  .header-actions {
    margin-left: 0;
    border-left: none;
    padding-left: 0;
    width: 100%;
    justify-content: flex-start;
    gap: var(--space-6);
  }

  .icon-btn {
    width: 3rem;
    height: 3rem;
    font-size: var(--text-xl);
  }
}

/* Focus styles */
.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}