/* plot.css — the solution plot (js/plot.js).  Uses the custom properties of app.css:
   --bg, --fg, --muted, --rule, --panel, --accent (light and dark). */

.plot {
  margin: 0.75rem 0 0;
  min-width: 0;
}

.plot-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  align-items: flex-end;
  margin: 0 0 0.6rem;
}

.plot-field {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  font-size: 0.82rem;
  line-height: 1.3;
  color: var(--muted);
}

.plot-input {
  box-sizing: border-box;
  width: 5.5rem;
  max-width: 100%;
  font: inherit;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  padding: 0.2rem 0.35rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
}

.plot-input:focus-visible,
.plot-button:focus-visible,
.plot-svg:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.plot-input[aria-invalid="true"] {
  border: 1px dashed var(--fg);
}

.plot-button {
  font: inherit;
  font-size: 0.82rem;
  line-height: 1.3;
  padding: 0.3rem 0.6rem;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 3px;
  cursor: pointer;
}

.plot-button[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.plot-button[hidden],
.plot-message[hidden],
.plot-legend-item[hidden] {
  display: none;
}

.plot-figure {
  min-width: 0;
}

.plot-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 180px;
  overflow: visible;
  touch-action: pan-y;
}

.plot-grid,
.plot-axis {
  stroke: var(--rule);
  stroke-width: 1;
  fill: none;
}

.plot-zero {
  stroke: var(--muted);
  stroke-width: 1;
  opacity: 0.6;
}

.plot-pole {
  stroke: var(--muted);
  stroke-width: 1;
  stroke-dasharray: 1 4;
}

.plot-tick {
  font-size: 11px;
  fill: var(--muted);
  font-variant-numeric: tabular-nums;
}

.plot-axis-name {
  font-style: italic;
}

.plot-line-re {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.plot-line-im {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.75;
  stroke-dasharray: 6 4;
  stroke-linejoin: round;
}

.plot-cross {
  stroke: var(--muted);
  stroke-width: 1;
  pointer-events: none;
}

.plot-dot {
  fill: var(--accent);
  stroke: var(--bg);
  stroke-width: 2;
  pointer-events: none;
}

.plot-dot-im {
  fill: var(--muted);
}

.plot-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  align-items: center;
  margin: 0.3rem 0 0;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--muted);
}

.plot-key {
  display: inline-block;
  width: 1.4rem;
  height: 0;
  margin-right: 0.4rem;
  vertical-align: middle;
  border-top: 2px solid var(--accent);
}

.plot-key-im {
  border-top: 2px dashed var(--muted);
}

.plot-readout {
  margin-left: auto;
  min-height: 1.4em;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  white-space: pre-wrap;
}

.plot-caption,
.plot-note,
.plot-message {
  margin: 0.3rem 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--muted);
}

.plot-message {
  color: var(--fg);
}

@media (forced-colors: active) {
  .plot-line-re { stroke: CanvasText; }
  .plot-line-im, .plot-pole, .plot-cross, .plot-zero { stroke: GrayText; }
  .plot-grid, .plot-axis { stroke: GrayText; }
}