/* ── Site Header ──────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-header-bg);
  border-bottom: 2px solid var(--color-accent);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  gap: var(--space-6);
}

/* ── Logo ─────────────────────────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo svg, .site-logo img {
  width: 40px;
  height: 40px;
}
.site-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.site-logo-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent-light);
  letter-spacing: 0.02em;
}
.site-logo-sub {
  font-size: var(--text-xs);
  color: var(--color-header-text);
  opacity: 0.7;
}

/* ── Primary Nav ─────────────────────────────────────────────────────────── */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-header-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  background: rgba(255,255,255,0.12);
  color: var(--color-accent-light);
}
.primary-nav a[aria-current="page"] {
  background: rgba(201, 154, 46, 0.18);
  color: var(--color-accent-light);
}
.primary-nav .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ── Hamburger ────────────────────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-header-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Nav ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .primary-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-header-bg);
    border-bottom: 2px solid var(--color-accent);
    padding: var(--space-4) var(--content-padding);
    gap: var(--space-2);
    box-shadow: var(--shadow-lg);
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { width: 100%; padding: var(--space-3) var(--space-4); }

  .site-logo-sub { display: none; }
}