/* ==========================================================================
   Виджет «дуга времени» для выдержки (эксперимент)

   ROLLBACK: удалить этот файл и <link> из phototrainer.html,
   а также createShutterOverlay из main.js / shutter-overlay.js
   ========================================================================== */

.pt-shutter-overlay {
  --pt-shutter-progress: 0.35;
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  z-index: 3;
  width: clamp(3.4rem, 16%, 5.25rem);
  aspect-ratio: 1;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.92);
  transition:
    opacity 220ms ease,
    transform 260ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 220ms;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.45));
}

.pt-shutter-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.pt-shutter-overlay__svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.pt-shutter-overlay__track {
  stroke: rgba(255, 255, 255, 0.16);
  stroke-width: 7;
  stroke-linecap: round;
  transform-origin: 70px 70px;
  transform: rotate(-90deg);
}

.pt-shutter-overlay__arc {
  stroke: #6fd0bf;
  stroke-width: 7;
  stroke-linecap: round;
  transform-origin: 70px 70px;
  transform: rotate(-90deg);
  stroke-dasharray: 0 340;
  transition: stroke 160ms ease;
  /* Чуть теплее/ярче на длинной выдержке */
  filter: saturate(calc(0.85 + var(--pt-shutter-progress) * 0.4));
}

.pt-shutter-overlay__hub {
  fill: rgba(223, 230, 236, 0.85);
}

.pt-shutter-overlay__meta {
  position: absolute;
  left: 50%;
  bottom: -0.05rem;
  transform: translate(-50%, 100%);
  display: grid;
  justify-items: center;
  gap: 0.12rem;
  padding: 0.14rem 0.38rem 0.16rem;
  border-radius: 8px;
  background: rgba(10, 13, 18, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  white-space: nowrap;
}

.pt-shutter-overlay__label {
  color: rgba(223, 230, 236, 0.95);
  font-family: var(--pt-mono, ui-monospace, monospace);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
}

.pt-shutter-overlay__seconds {
  color: rgba(170, 182, 192, 0.88);
  font-family: var(--pt-mono, ui-monospace, monospace);
  font-size: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
}

.phototrainer__camera-screen.is-capture-open .pt-shutter-overlay {
  opacity: 0 !important;
  visibility: hidden !important;
}

@media (max-width: 720px) {
  .pt-shutter-overlay {
    width: clamp(3rem, 18%, 4.4rem);
    top: 0.4rem;
    right: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pt-shutter-overlay {
    transition: none;
  }
}