/* ============================================================================
   ReBox — shared/css/feedback.css
   Phase 4: shared UI feedback system (loading + connectivity).

   This is presentational infrastructure — like design-tokens.css and
   auth-tokens.css, it is intentionally shared across every account, not
   business logic. It only ever draws generic overlays/banners and never
   touches or knows about any account's data.

   Contains:
   - .rebox-page-loader   full-page loading overlay (ReBoxLoading.showPageLoader)
   - .rebox-net-banner    connectivity alert banner (network-status.js)
   - .rebox-skeleton      generic content-placeholder shimmer utility

   All values reference shared/css/design-tokens.css tokens — no hardcoded
   hex/px, per DESIGN-SYSTEM.md's golden rule. Load design-tokens.css BEFORE
   this file on every page that uses it.
   ============================================================================ */

/* ---------------------------------------------------------------------------
   Page loader — a calm, branded overlay for "something is about to appear".
   Shown only while there is nothing useful on screen yet (initial catalog
   boot); never blocks an already-visible page.
--------------------------------------------------------------------------- */
.rebox-page-loader {
  position: fixed;
  inset: 0;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  background: var(--surface-0);
  opacity: 1;
  transition: opacity var(--dur-med) var(--ease-out), visibility var(--dur-med) var(--ease-out);
}
.rebox-page-loader[hidden],
.rebox-page-loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.rebox-page-loader__mark {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  background: var(--fc-primary-light, var(--surface-2));
  animation: rebox-loader-pulse 1.4s var(--ease-out) infinite;
}
.rebox-page-loader__mark img { width: 34px; height: 34px; }
.rebox-page-loader__spin {
  width: 26px;
  height: 26px;
  border: 3px solid var(--border-soft);
  border-top-color: var(--rebox-brand);
  border-radius: var(--radius-pill);
  animation: reboxspin 0.7s linear infinite;
}
.rebox-page-loader__label {
  font-size: var(--text-small);
  color: var(--text-muted);
  font-weight: 600;
}
@keyframes rebox-loader-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.06); opacity: 0.85; }
}
/* Canonical spin keyframes — reused from shared/css/auth-tokens.css's
   .btn .spin (rather than adding a third near-duplicate animation; see
   DESIGN-SYSTEM.md for the note on the pre-existing .driver-create-submit
   .spin duplicate found during this audit, flagged for a follow-up cleanup). */
@keyframes reboxspin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------------------
   Connectivity banner — smooth, non-alarming, slides down from the top.
--------------------------------------------------------------------------- */
.rebox-net-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  /* Deliberately above every other overlay in the app (highest pre-existing
     z-index found project-wide was 100000, the customer intro splash) — a
     connectivity alert should never be hidden behind anything else. */
  z-index: 200000;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  padding-top: calc(var(--space-3) + env(safe-area-inset-top, 0px));
  font-size: var(--text-small);
  font-weight: 700;
  text-align: center;
  color: var(--text-main);
  background: var(--fc-accent, var(--rebox-yellow));
  transform: translateY(-110%);
  transition: transform var(--dur-med) var(--ease-out);
  box-shadow: var(--elevation-2);
}
.rebox-net-banner.is-visible { transform: translateY(0); }
.rebox-net-banner--offline {
  background: #fdeceb;
  color: #a3281c;
}
.rebox-net-banner__icon { font-size: 18px; line-height: 1; flex: 0 0 auto; }
.rebox-net-banner__retry {
  margin-inline-start: var(--space-2);
  border: none;
  background: rgba(255,255,255,0.55);
  color: inherit;
  font-weight: 800;
  font-size: var(--text-caption);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  cursor: pointer;
}
.rebox-net-banner--offline .rebox-net-banner__retry { background: rgba(163,40,28,0.1); }

/* Push page content down while the banner is showing, so it never covers a
   fixed header. Pages opt in by toggling this class on <body>. */
body.rebox-net-banner-active { padding-top: 44px; }
@media (max-width: 400px) { body.rebox-net-banner-active { padding-top: 40px; } }

/* ---------------------------------------------------------------------------
   Generic skeleton shimmer — for any content block waiting on data.
--------------------------------------------------------------------------- */
.rebox-skeleton {
  position: relative;
  overflow: hidden;
  background: var(--surface-2);
  border-radius: var(--radius-md);
}
.rebox-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
  animation: rebox-skeleton-sweep 1.3s ease-in-out infinite;
}
@keyframes rebox-skeleton-sweep {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}
@media (prefers-reduced-motion: reduce) {
  .rebox-page-loader__mark,
  .rebox-page-loader__spin,
  .rebox-skeleton::after { animation: none; }
}