/* Diagram zoom / lightbox — chassis structural; colors via Valentus/DevCentr tokens. */
.adt-diagram-zoom {
  position: relative;
  isolation: isolate;
}

.adt-diagram-zoom__viewport {
  overflow: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

.adt-diagram-zoom__viewport.is-zoomed {
  cursor: grab;
}

.adt-diagram-zoom__toolbar {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 2;
  display: flex;
  gap: 0.25rem;
  padding: 0.2rem;
  border-radius: var(--adt-radius, 8px);
  border: 1px solid var(--adt-border, color-mix(in srgb, CanvasText 18%, transparent));
  background: color-mix(in srgb, var(--adt-elevated, Canvas) 92%, transparent);
  box-shadow: 0 1px 4px color-mix(in srgb, CanvasText 12%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease;
}

.adt-diagram-zoom:hover .adt-diagram-zoom__toolbar,
.adt-diagram-zoom:focus-within .adt-diagram-zoom__toolbar {
  opacity: 1;
  pointer-events: auto;
}

.adt-diagram-zoom__btn {
  appearance: none;
  margin: 0;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.4rem;
  border: 0;
  border-radius: calc(var(--adt-radius, 8px) - 2px);
  background: transparent;
  color: var(--adt-ink, CanvasText);
  font: 600 0.85rem/1 var(--adt-font-ui, system-ui, sans-serif);
  cursor: pointer;
}

.adt-diagram-zoom__btn:hover,
.adt-diagram-zoom__btn:focus-visible {
  background: var(--adt-accent-soft, color-mix(in srgb, var(--adt-accent, #178f80) 16%, transparent));
  color: var(--adt-accent, #178f80);
  outline: none;
}

.adt-diagram-zoom__btn:focus-visible {
  box-shadow: 0 0 0 2px var(--adt-accent, #178f80);
}

html.dark-theme .adt-diagram-zoom__toolbar {
  background: color-mix(in srgb, var(--adt-elevated, #25262b) 94%, transparent);
  border-color: var(--adt-border, #373a40);
}

.adt-diagram-lightbox[hidden] {
  display: none !important;
}

.adt-diagram-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: grid;
  place-items: center;
}

.adt-diagram-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, #000 55%, transparent);
}

.adt-diagram-lightbox__panel {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: min(96vw, 1100px);
  height: min(92vh, 820px);
  border-radius: var(--adt-radius, 8px);
  border: 1px solid var(--adt-border, color-mix(in srgb, CanvasText 18%, transparent));
  background: var(--adt-elevated, Canvas);
  color: var(--adt-ink, CanvasText);
  box-shadow: 0 12px 40px color-mix(in srgb, #000 35%, transparent);
  overflow: hidden;
}

.adt-diagram-lightbox__toolbar {
  display: flex;
  gap: 0.35rem;
  justify-content: flex-end;
  align-items: center;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--adt-border, color-mix(in srgb, CanvasText 14%, transparent));
  background: color-mix(in srgb, var(--adt-canvas, Canvas) 88%, var(--adt-elevated, Canvas));
}

.adt-diagram-lightbox__stage {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  background:
    radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--adt-border, #888) 45%, transparent) 1px, transparent 0)
    0 0 / 16px 16px;
}

.adt-diagram-lightbox__stage:active {
  cursor: grabbing;
}

.adt-diagram-lightbox__canvas {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  transform-origin: center center;
}

.adt-diagram-lightbox__canvas > img,
.adt-diagram-lightbox__canvas > svg {
  max-width: 92%;
  max-height: 92%;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
}

html.adt-diagram-lightbox-open {
  overflow: hidden;
}

/* Keep AsciiDoc title below chrome when present */
.adt-diagram-zoom > .title {
  margin-top: 0.5rem;
}