/* L19-specific styles on top of shared/custom.css, L10/custom.css, L16/custom.css. */

/* Math neuron diagram. */
.reveal .neuron-diagram { display: block; margin: 0.3em auto; max-height: 260px; }
.reveal .neuron-diagram .input-node {
  fill: #dbeafe;
  stroke: #1d4ed8;
  stroke-width: 1.5;
}
.reveal .neuron-diagram .sum-node {
  fill: #fff;
  stroke: #1f2937;
  stroke-width: 2;
}
.reveal .neuron-diagram .out-node {
  fill: #dcfce7;
  stroke: #16a34a;
  stroke-width: 2;
}
.reveal .neuron-diagram .bias-node {
  fill: #fef3c7;
  stroke: #d97706;
  stroke-width: 1.5;
}
.reveal .neuron-diagram .edge {
  stroke: #6b7280;
  stroke-width: 1.4;
  fill: none;
}
.reveal .neuron-diagram .weight-label {
  font-size: 11px;
  fill: #1d4ed8;
  font-style: italic;
}
.reveal .neuron-diagram text {
  font-size: 13px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
  fill: #111827;
}
.reveal .neuron-diagram .activation-box {
  fill: #fef3c7;
  stroke: #92400e;
  stroke-width: 1.5;
  rx: 6;
}

/* 2x2 activation-function plots. */
.reveal .act-fn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6em;
  margin: 0.3em 0;
}
.reveal .act-fn-grid .act-card {
  padding: 0.5em 0.7em;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-top: 3px solid #1d4ed8;
  border-radius: 4px;
}
.reveal .act-fn-grid .act-card h3 {
  font-size: 0.85em;
  margin: 0 0 0.2em 0;
  color: #1d4ed8;
}
.reveal .act-fn-grid .act-card .formula {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78em;
  color: #4b5563;
  margin: 0 0 0.2em 0;
}
.reveal .act-fn-grid .act-card .tradeoff {
  font-size: 0.72em;
  color: #6b7280;
  margin: 0.2em 0 0 0;
}
.reveal .act-fn-grid .act-plot {
  display: block;
  margin: 0.1em auto;
  max-height: 90px;
}
.reveal .act-fn-grid .act-plot .axis { stroke: #6b7280; stroke-width: 0.8; }
.reveal .act-fn-grid .act-plot .curve {
  stroke: #1d4ed8;
  stroke-width: 2;
  fill: none;
}

/* Perceptron diagram. */
.reveal .perceptron-diagram { display: block; margin: 0.3em auto; max-height: 220px; }
.reveal .perceptron-diagram .input circle {
  fill: #dbeafe;
  stroke: #1d4ed8;
  stroke-width: 1.5;
}
.reveal .perceptron-diagram .bias circle {
  fill: #fef3c7;
  stroke: #d97706;
  stroke-width: 1.5;
}
.reveal .perceptron-diagram .output circle {
  fill: #dcfce7;
  stroke: #16a34a;
  stroke-width: 2;
}
.reveal .perceptron-diagram .hidden circle {
  fill: #fff;
  stroke: #6b7280;
  stroke-width: 1.5;
}
.reveal .perceptron-diagram text {
  font-size: 12px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
  fill: #111827;
}
.reveal .perceptron-diagram .edge {
  stroke: #6b7280;
  stroke-width: 1.2;
  fill: none;
}
.reveal .perceptron-diagram .weight {
  font-size: 11px;
  fill: #1d4ed8;
  font-style: italic;
}

/* AND/OR/XOR scatter row. */
.reveal .lin-sep-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.4em;
  margin: 0.3em auto;
}
.reveal .lin-sep-row .sep-panel {
  text-align: center;
  padding: 0.4em;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
}
.reveal .lin-sep-row .sep-panel h3 {
  font-size: 0.85em;
  margin: 0 0 0.3em 0;
  color: #1d4ed8;
}
.reveal .lin-sep-row .sep-plot {
  display: block;
  margin: 0 auto;
  max-height: 140px;
}
.reveal .lin-sep-row .sep-plot .axis { stroke: #6b7280; stroke-width: 1; }
.reveal .lin-sep-row .sep-plot .pos {
  fill: #16a34a;
  stroke: #fff;
  stroke-width: 1.5;
}
.reveal .lin-sep-row .sep-plot .neg {
  fill: #dc2626;
  stroke: #fff;
  stroke-width: 1.5;
}
.reveal .lin-sep-row .sep-plot .sep-line {
  stroke: #1d4ed8;
  stroke-width: 2;
  stroke-dasharray: 4 3;
  fill: none;
}
.reveal .lin-sep-row .sep-panel .caption {
  font-size: 0.72em;
  color: #4b5563;
  margin-top: 0.2em;
}

/* RNN diagrams. */
.reveal .rnn-cell { display: block; margin: 0.3em auto; max-height: 200px; }
.reveal .rnn-cell .cell-box {
  fill: #fef3c7;
  stroke: #d97706;
  stroke-width: 2;
  rx: 6;
}
.reveal .rnn-cell .node circle {
  fill: #dbeafe;
  stroke: #1d4ed8;
  stroke-width: 1.5;
}
.reveal .rnn-cell .out-node circle {
  fill: #dcfce7;
  stroke: #16a34a;
  stroke-width: 1.5;
}
.reveal .rnn-cell text {
  font-size: 12px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
}
.reveal .rnn-cell .edge {
  stroke: #6b7280;
  stroke-width: 1.4;
  fill: none;
}

/* Language-model unrolled flow. */
.reveal .lm-flow { display: block; margin: 0.3em auto; max-height: 260px; }
.reveal .lm-flow .char-box {
  fill: #dbeafe;
  stroke: #1d4ed8;
  stroke-width: 1.5;
  rx: 3;
}
.reveal .lm-flow .hidden-box {
  fill: #fef3c7;
  stroke: #d97706;
  stroke-width: 1.5;
  rx: 6;
}
.reveal .lm-flow .pred-box {
  fill: #dcfce7;
  stroke: #16a34a;
  stroke-width: 1.5;
  rx: 3;
}
.reveal .lm-flow text {
  font-size: 11px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
  fill: #111827;
}
.reveal .lm-flow .edge {
  stroke: #6b7280;
  stroke-width: 1.2;
  fill: none;
}