/* === PERSISTENT NAVIGATION === */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--primitive-space-4);
  padding: max(var(--primitive-space-3), env(safe-area-inset-top)) max(var(--primitive-space-6), env(safe-area-inset-right)) var(--primitive-space-3) max(var(--primitive-space-6), env(safe-area-inset-left));
  background: var(--surface-base);
  border-bottom: 1px solid var(--surface-border);
}

.site-nav-brand {
  font-size: var(--primitive-text-sm);
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.site-nav-brand:hover { color: var(--text-primary); }

.site-nav-progress {
  display: flex;
  align-items: center;
  gap: var(--primitive-space-2);
  flex: 1;
  justify-content: center;
}

.site-nav-dot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  text-decoration: none;
}

.site-nav-dot-pip {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: var(--primitive-radius-full);
  border: 1.5px solid var(--accent-dim);
  background: transparent;
  transition: background var(--duration-transition) var(--easing-interaction),
              border-color var(--duration-transition) var(--easing-interaction),
              transform var(--duration-transition) var(--easing-interaction);
}

.site-nav-dot.active .site-nav-dot-pip {
  background: var(--accent-active);
  border-color: var(--accent-active);
}

.site-nav-dot.current .site-nav-dot-pip {
  transform: scale(1.4);
}

.site-nav-dot:hover .site-nav-dot-pip {
  border-color: var(--text-primary);
}

.site-nav-dot:active .site-nav-dot-pip {
  border-color: var(--text-primary);
}

.site-nav-label {
  font-size: var(--primitive-text-xs);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  flex-shrink: 0;
  font-style: normal;
}

@media (max-width: 600px) {
  .site-nav-label { display: none; }
}