/* Neural network playground for "Can a Neural Net Learn It?"
 * Matches the dark demo panels in optimal-ask.md. Buttons use the theme's
 * default button style. */

.nn-playground {
  background-color: #2f3033;
  padding: 20px;
  margin: 20px 0;
  font-family: monospace;
  color-scheme: dark;
}

.nn-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding-bottom: 14px;
}

.nn-field label {
  display: block;
  font-size: 12px;
  margin-bottom: 4px;
}

.nn-field select,
.nn-field input[type="text"] {
  width: 100%;
  box-sizing: border-box;
  padding: 7px 9px;
  border: 1px solid #4a4b50;
  border-radius: 8px;
  background: #292a2d;
  color: #ffffff;
  font-family: monospace;
  font-size: 14px;
  outline: none;
}

.nn-field select:focus,
.nn-field input[type="text"]:focus {
  border-color: #0091df;
}

.nn-hint {
  font-size: 11px;
  color: #73747b;
  margin-top: 4px;
  line-height: 1.4;
}

.nn-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding-bottom: 10px;
}

.nn-buttons button {
  flex: 0 0 auto;
}

.nn-graph {
  position: relative;
  width: 100%;
  height: 420px;
}

/* Absolute positioning keeps the canvas size from feeding back into the
 * container size that the ResizeObserver measures. */
.nn-graph canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.nn-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  color: #ffffff;
  padding-top: 10px;
}

.nn-stats span {
  font-variant-numeric: tabular-nums;
}

.nn-legend div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nn-swatch {
  display: inline-block;
  width: 26px;
  height: 3px;
  border-radius: 2px;
}

.nn-swatch--target { background: #55ef53; }
.nn-swatch--net    { background: #0091df; }

@media (max-width: 684px) {
  .nn-controls {
    grid-template-columns: 1fr;
  }

  .nn-graph {
    height: 320px;
  }
}