/* Service Ghost · Paper Night — app chrome nav (V2 Desk OS pattern) */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--pad);
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1.5px solid var(--border);
}
.app-nav .brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--fg);
}
.app-nav .brand .word {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: -0.01em;
}
.app-nav .tabs {
  display: flex;
  gap: var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.app-nav .tabs a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--ease);
}
.app-nav .tabs a:hover,
.app-nav .tabs a[aria-current="page"] { color: var(--fg); }
@media (max-width: 640px) { .app-nav .tabs { display: none; } }