/*!
 * ABC Ladeanzeige „Fährte“ (abc-busy) 1.0.0 – Quelle: ABC/shared/abc-busy/, verteilt per sync.sh.
 * Farben/Schrift stellt jede App über diese Variablen ein (Theme: style.css, Hub/Tool: app.css):
 *   --abc-busy-ink     Beagle + Pfoten + Knopf      (Weinrot)
 *   --abc-busy-accent  feine Linie unter dem Text   (Jahresfarbe/Gold – nie als Fläche)
 *   --abc-busy-glass   Glas über der Seite          (Sand, halbtransparent)
 *   --abc-busy-text    Textfarbe
 *   --abc-busy-font    Schrift des Textes
 *   --abc-busy-mark    url() der Beagle-Grafik (setzt abc-busy.js aus der Konfiguration)
 * Animiert werden nur transform/opacity: das läuft auf der Grafikkarte weiter, auch wenn der
 * Browser während eines Seitenwechsels ausgelastet ist (sonst friert die Spur auf dem Handy ein).
 */
.abc-busy {
  --_ink: var(--abc-busy-ink, #630606);
  --_accent: var(--abc-busy-accent, #e6b31e);
  --_glass: var(--abc-busy-glass, rgba(250, 247, 242, 0.74));
  --_text: var(--abc-busy-text, #211B19);
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top, 0px)) max(24px, env(safe-area-inset-right, 0px)) max(24px, env(safe-area-inset-bottom, 0px)) max(24px, env(safe-area-inset-left, 0px));
  background: var(--_glass);
  -webkit-backdrop-filter: blur(6px) saturate(1.1);
  backdrop-filter: blur(6px) saturate(1.1);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s ease, visibility 0s linear 0.18s;
  /* bleibt im Layout (visibility statt display:none), damit der Browser die Beagle-Grafik
     schon beim Seitenaufbau lädt und sie beim Seitenwechsel sofort da ist */
}

/* Wartet (0–400 ms): unsichtbar, fängt aber schon Klicks ab (gegen doppeltes Absenden) */
.abc-busy[data-state="pending"] {
  visibility: visible;
  pointer-events: auto;
  cursor: progress;
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  transition: none;
}
.abc-busy[data-state="pending"] .abc-busy__box { visibility: hidden; }

.abc-busy[data-state="visible"],
.abc-busy[data-state="slow"],
.abc-busy[data-state="stuck"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  cursor: progress;
  transition: opacity 0.18s ease, visibility 0s;
}
.abc-busy[data-state="stuck"] { cursor: default; }

.abc-busy__box {
  display: grid;
  justify-items: center;
  gap: 12px;
  text-align: center;
  outline: none;
}

.abc-busy__mark {
  width: 66px;
  aspect-ratio: 1633 / 1417;
  background: var(--_ink);
  -webkit-mask: var(--abc-busy-mark) center / contain no-repeat;
  mask: var(--abc-busy-mark) center / contain no-repeat;
}

.abc-busy__trail {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
}
.abc-busy__trail svg {
  width: 18px;
  height: 18px;
  fill: var(--_ink);
  opacity: 0;
  transform: rotate(90deg);
}
.abc-busy__trail svg:nth-child(odd) { margin-top: -14px; }
.abc-busy__trail svg:nth-child(even) { margin-top: 14px; }

/* Animation nur, solange sichtbar – im Ruhezustand kostet die Anzeige nichts */
.abc-busy[data-state="visible"] .abc-busy__trail svg,
.abc-busy[data-state="slow"] .abc-busy__trail svg,
.abc-busy[data-state="stuck"] .abc-busy__trail svg {
  animation: abc-busy-step 2.1s ease-in-out infinite;
}
.abc-busy__trail svg:nth-child(2) { animation-delay: 0.25s; }
.abc-busy__trail svg:nth-child(3) { animation-delay: 0.5s; }
.abc-busy__trail svg:nth-child(4) { animation-delay: 0.75s; }
.abc-busy__trail svg:nth-child(5) { animation-delay: 1s; }
.abc-busy__trail svg:nth-child(6) { animation-delay: 1.25s; }

.abc-busy__text {
  margin: 0;
  min-height: 1.4em;
  max-width: 32ch;
  font-family: var(--abc-busy-font, inherit);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--_text);
}
.abc-busy__text::after {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  margin: 8px auto 0;
  border-radius: 2px;
  background: var(--_accent);
}

.abc-busy__exit {
  display: none;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.abc-busy[data-state="stuck"] .abc-busy__exit { display: flex; }

.abc-busy__btn {
  font: 600 0.88rem/1.2 var(--abc-busy-font, inherit);
  padding: 9px 16px;
  min-height: 40px;
  border-radius: 999px;
  border: 1px solid var(--_ink);
  background: #fff;
  color: var(--_ink);
  cursor: pointer;
}
.abc-busy__btn--primary { background: var(--_ink); color: #fff; }
.abc-busy__btn:focus-visible { outline: 3px solid var(--_accent); outline-offset: 2px; }

@keyframes abc-busy-step {
  0% { opacity: 0; transform: rotate(90deg) scale(0.7); }
  15% { opacity: 1; transform: rotate(90deg) scale(1); }
  55% { opacity: 1; transform: rotate(90deg) scale(1); }
  85%, 100% { opacity: 0; transform: rotate(90deg) scale(1); }
}
@keyframes abc-busy-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .abc-busy,
  .abc-busy[data-state] { transition: none; }
  .abc-busy[data-state] .abc-busy__trail svg { animation: none; opacity: 0.8; }
  .abc-busy[data-state="visible"] .abc-busy__text,
  .abc-busy[data-state="slow"] .abc-busy__text { animation: abc-busy-pulse 2.4s ease-in-out infinite; }
}

@media print {
  .abc-busy { display: none !important; }
}