/* Canvas viewport, controls, preview panel, and legend component styles.
   Uses Omnis semantic tokens only — no hard-coded colors.

   Host must include this file:
     <link rel="stylesheet" href="_content/Omnis.Shared.UI/components/canvas.css" /> */

/* ── CanvasViewport ───────────────────────────────────────── */

.omnis-canvas-viewport {
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 0;
}

.omnis-canvas-viewport--full-width {
  border: none;
  border-radius: 0;
}

.omnis-canvas-viewport__toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-block-end: 1px solid var(--border);
  background: var(--card);
  flex-shrink: 0;
  min-height: 0;
  flex-wrap: wrap;
}

.omnis-canvas-viewport__content {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

.omnis-canvas-viewport__legend-slot {
  flex-shrink: 0;
  border-block-start: 1px solid var(--border);
  background: var(--card);
}

.omnis-canvas-viewport__details-slot {
  flex-shrink: 0;
  border-block-start: 1px solid var(--border);
  background: var(--card);
  max-height: 40%;
  overflow-y: auto;
}

/* ── Keyframes ────────────────────────────────────────────── */

@keyframes omnis-canvas-spin {
  to { transform: rotate(360deg); }
}

/* ── CanvasViewport states ────────────────────────────────── */

.omnis-canvas-viewport__state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  width: 100%;
  height: 100%;
  min-height: 120px;
}

.omnis-canvas-viewport__state-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}

.omnis-canvas-viewport__state-label {
  font-size: var(--text-sm);
  color: var(--muted);
  margin: 0;
}

/* Loading spinner — animation is CSS-class-driven so reduced-motion can suppress it. */
.omnis-canvas-viewport__spinner {
  animation: omnis-canvas-spin 700ms linear infinite;
}

.omnis-canvas-viewport__state--error .omnis-canvas-viewport__state-icon {
  color: var(--state-blocked-text);
}

.omnis-canvas-viewport__state--error .omnis-canvas-viewport__state-label {
  color: var(--state-blocked-text);
}

/* ── CanvasControls ───────────────────────────────────────── */

.omnis-canvas-controls {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.omnis-canvas-controls__group {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--card);
  overflow: hidden;
}

.omnis-canvas-controls__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
  font-size: var(--text-base);
  transition: background var(--motion-duration-fast) var(--motion-easing-ease),
              color var(--motion-duration-fast) var(--motion-easing-ease);
}

.omnis-canvas-controls__btn:hover:not(:disabled) {
  background: var(--accent-bg);
  color: var(--text);
}

.omnis-canvas-controls__btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.omnis-canvas-controls__btn:disabled {
  cursor: not-allowed;
  opacity: var(--disabled-opacity);
}

.omnis-canvas-controls__btn--active {
  color: var(--accent);
  background: var(--accent-bg);
}

.omnis-canvas-controls__btn--active:hover:not(:disabled) {
  background: var(--accent-bg);
  color: var(--accent-hover);
}

.omnis-canvas-controls__separator {
  display: inline-block;
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  .omnis-canvas-controls__btn {
    transition: none;
  }

  .omnis-canvas-viewport__spinner {
    animation: none;
  }
}

/* Forced-colors: ensure buttons remain visible */
@media (forced-colors: active) {
  .omnis-canvas-controls__btn {
    border: 1px solid ButtonText;
    forced-color-adjust: none;
  }
  .omnis-canvas-controls__btn--active {
    background: Highlight;
    color: HighlightText;
  }
}

/* ── DiagramPreviewPanel ──────────────────────────────────── */

.omnis-diagram-preview {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.omnis-diagram-preview__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-block-end: 1px solid var(--border);
  background: var(--card);
  flex-shrink: 0;
}

.omnis-diagram-preview__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.omnis-diagram-preview__surface {
  flex: 1;
  overflow: hidden;
  position: relative;
  min-height: 0;
}

.omnis-diagram-preview__fullscreen-surface {
  width: 100%;
  height: 100%;
  overflow: auto;
}

/* ── LegendStrip (horizontal) ─────────────────────────────── */

.omnis-legend-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
  padding: var(--space-2) var(--space-3);
  /* Ensure the strip never contributes to horizontal scroll at any width */
  overflow: hidden;
  min-width: 0;
}

.omnis-legend-strip__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  /* Allow the group to shrink below its intrinsic width so entries wrap */
  min-width: 0;
  max-width: 100%;
}

.omnis-legend-strip__group-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-inline-end: var(--space-1);
  white-space: nowrap;
}

.omnis-legend-strip__entry {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text);
  white-space: nowrap;
  /* Cap each entry so it cannot exceed the strip width */
  max-width: 100%;
}

.omnis-legend-strip__swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: 1px solid var(--border);
}

/* ── LegendPanel (floating / side) ───────────────────────── */

.omnis-legend-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-height: 60vh;
  overflow-y: auto;
}

.omnis-legend-panel--side {
  border-radius: 0;
  box-shadow: none;
  border: none;
  border-inline-start: 1px solid var(--border);
  max-height: none;
  height: 100%;
}

.omnis-legend-panel__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin: 0;
  padding-block-end: var(--space-2);
  border-block-end: 1px solid var(--border);
  flex-shrink: 0;
}

.omnis-legend-panel__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.omnis-legend-panel__group-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-block-end: var(--space-1);
}

.omnis-legend-panel__entry {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text);
}

.omnis-legend-panel__swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: 1px solid var(--border);
}

/* Responsive: LegendStrip collapses gracefully at mobile widths */
@media (max-width: 480px) {
  .omnis-legend-strip {
    gap: var(--space-2);
    padding: var(--space-2);
  }

  .omnis-legend-strip__group {
    gap: var(--space-1);
  }

  .omnis-legend-strip__group-title {
    width: 100%;
    flex-basis: 100%;
  }
}