/* =========================================================
   PWA / "feels like an app" layer
   Small, additive rules. Loaded before responsive.css.
========================================================= */

html {
  /* No pull-to-refresh / rubber-band bounce: a stray swipe mid-quiz
     should never reload the page and lose the attempt. */
  overscroll-behavior-y: none;
  -webkit-text-size-adjust: 100%;
}

body {
  -webkit-tap-highlight-color: transparent;
}

/* Keep floating UI clear of the phone's gesture bar. */
.install-nudge {
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
}

/* ---------- online / offline pill (js/pwa.js) ---------- */
.qa-net {
  position: fixed;
  top: calc(10px + env(safe-area-inset-top, 0px));
  left: 50%;
  z-index: 9000;
  max-width: calc(100vw - 32px);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.3;
  text-align: center;
  color: #fff;
  background: var(--color-ink-bg);
  box-shadow: 0 8px 24px rgba(6, 36, 36, 0.28);
  transform: translate(-50%, -180%);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 0.3s ease,
    opacity 0.3s ease;
}

.qa-net[data-tone="online"] {
  background: var(--color-success-solid);
}

.qa-net.qa-net-show {
  transform: translate(-50%, 0);
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .qa-net {
    transition: none;
  }
}