.pf-site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  /* Solid background — no backdrop-filter (it traps position:fixed children) */
  background: #f8fafc;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.pf-site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: var(--header-height-mobile);
  position: relative;
  z-index: 52;
}

@media (min-width: 768px) {
  .pf-site-header-inner {
    height: var(--header-height-desktop);
  }
}

.pf-brand-group {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  min-width: 0;
  position: relative;
  z-index: 53;
}

.pf-brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-neutral-900);
  min-width: 0;
}

.pf-brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  flex-shrink: 0;
}

.pf-brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.pf-brand-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pf-brand-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.pf-age-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-danger);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  box-shadow: 0 0 0 2px #fee2e2, 0 8px 20px rgba(220, 38, 38, 0.4);
  flex-shrink: 0;
}

@media (max-width: 599px) {
  .pf-age-badge {
    font-size: 0.72rem;
    padding: 3px 10px;
  }
}

.pf-site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  margin-right: var(--space-6);
}

.pf-nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  list-style: none;
  margin: 0;
  padding: 0;
}

.pf-nav-menu a {
  color: var(--color-muted);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.pf-nav-menu a[data-active="true"],
.pf-nav-menu a:focus-visible,
.pf-nav-menu a:hover {
  color: var(--color-neutral-900);
  border-bottom-color: var(--color-primary);
}

.pf-nav-extra {
  display: none;
}

.pf-header-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-muted);
}

.pf-header-kpi-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-success);
  flex-shrink: 0;
}

.pf-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: #fff;
  cursor: pointer;
  padding: 0;
  gap: 5px;
  flex-shrink: 0;
  z-index: 53;
  position: relative;
}

.pf-nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-neutral-800);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

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

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

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

@media (max-width: 959px) {
  .pf-site-header-inner {
    gap: var(--space-4);
  }

  .pf-brand-subtitle {
    display: none;
  }

  .pf-header-meta {
    display: none;
  }

  .pf-nav-toggle {
    display: inline-flex;
  }

  .pf-nav-extra {
    display: list-item;
  }

  .pf-site-nav {
    position: fixed;
    left: 0;
    right: 0;
    /* Start below header bar (inner height + 1px border-bottom) */
    top: calc(var(--header-height-mobile) + 1px);
    bottom: 0;
    width: 100%;
    height: auto;
    margin: 0;
    background: #0f172a;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
    padding: var(--space-6) 0 calc(var(--space-10) + env(safe-area-inset-bottom, 0px));
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 40;
  }

  .pf-site-nav.is-open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  /*
   * overflow:hidden on body (scroll lock) breaks position:sticky, so the header
   * bar can scroll away while the fixed drawer stays — leaving a content sliver
   * and hiding logo/toggle. Pin the header for the open-menu state.
   */
  body.pf-nav-open .pf-site-header {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    width: 100%;
  }

  .pf-nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-inline: var(--space-6);
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
  }

  .pf-nav-menu li {
    border-bottom: 1px solid rgba(148, 163, 184, 0.22);
    width: 100%;
  }

  .pf-nav-menu a {
    display: block;
    width: 100%;
    box-sizing: border-box;
    color: #e5e7eb;
    border-bottom: none;
    font-size: 1.05rem;
    letter-spacing: 0.12em;
    padding: 1.05rem 0.35rem;
    min-height: 48px;
    line-height: 1.3;
  }

  .pf-nav-menu a:hover,
  .pf-nav-menu a:focus-visible,
  .pf-nav-menu a[data-active="true"] {
    color: #ffffff;
    border-bottom-color: transparent;
    background: rgba(255, 255, 255, 0.04);
  }
}

@media (min-width: 768px) and (max-width: 959px) {
  .pf-site-nav {
    top: calc(var(--header-height-desktop) + 1px);
  }
}

body.pf-nav-open {
  overflow: hidden;
}

.pf-age-badge-fixed {
  position: fixed;
  right: var(--space-7);
  bottom: var(--space-8);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-danger);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  box-shadow: 0 0 0 2px #fee2e2, 0 12px 32px rgba(220, 38, 38, 0.55);
}

@media (max-width: 767px) {
  .pf-age-badge-fixed {
    right: var(--space-6);
    bottom: var(--space-7);
    font-size: 0.72rem;
    padding-inline: 10px;
  }
}