/* L18-specific styles on top of shared/custom.css, L9/custom.css, L10/custom.css. */

/* Decision-tree rendering (slides 6, 7, 9). */
.reveal .dt-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4em;
  font-size: 0.78em;
  margin: 0.3em auto;
}
.reveal .dt-tree .dt-level {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 0.9em;
  flex-wrap: wrap;
}
.reveal .dt-node {
  display: inline-block;
  padding: 0.25em 0.7em;
  background: #dbeafe;
  border: 2px solid #1d4ed8;
  border-radius: 6px;
  color: #1e3a8a;
  font-weight: 700;
  font-size: 0.95em;
}
.reveal .dt-leaf {
  display: inline-block;
  padding: 0.25em 0.7em;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9em;
}
.reveal .dt-leaf.yes {
  background: #dcfce7;
  border: 2px solid #16a34a;
  color: #166534;
}
.reveal .dt-leaf.no {
  background: #fee2e2;
  border: 2px solid #dc2626;
  color: #991b1b;
}
.reveal .dt-branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25em;
}
.reveal .dt-branch .dt-edge-label {
  font-size: 0.72em;
  color: #6b7280;
  font-style: italic;
}
.reveal .dt-line {
  width: 2px;
  background: #6b7280;
  height: 14px;
}

/* Split-bar chart (slide 12). */
.reveal .split-bars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6em;
  margin: 0.4em auto;
}
.reveal .split-bars .split-card {
  padding: 0.6em 0.8em;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
}
.reveal .split-bars .split-card h3 {
  font-size: 0.95em;
  margin: 0 0 0.4em 0;
  text-align: center;
  color: #1d4ed8;
}
.reveal .split-bars .bar-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  align-items: center;
  gap: 0.4em;
  margin-bottom: 0.25em;
}
.reveal .split-bars .bar-label {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78em;
  color: #4b5563;
  text-align: right;
}
.reveal .split-bars .bar-container {
  display: flex;
  height: 18px;
  background: #f3f4f6;
  border-radius: 3px;
  overflow: hidden;
}
.reveal .split-bars .bar-yes {
  background: #16a34a;
}
.reveal .split-bars .bar-no {
  background: #dc2626;
}
.reveal .split-bars .bar-text {
  font-size: 0.72em;
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Entropy plot H(p) (slide 13). */
.reveal .entropy-plot { display: block; margin: 0.3em auto; max-height: 220px; }
.reveal .entropy-plot .axis { stroke: #6b7280; stroke-width: 1; }
.reveal .entropy-plot .grid { stroke: #e5e7eb; stroke-width: 0.6; stroke-dasharray: 3 3; }
.reveal .entropy-plot .axis-label { font-size: 11px; fill: #6b7280; }
.reveal .entropy-plot .curve {
  stroke: #1d4ed8;
  stroke-width: 2.5;
  fill: none;
}
.reveal .entropy-plot .marker { fill: #dc2626; }
.reveal .entropy-plot .marker-label { font-size: 11px; font-weight: 700; fill: #991b1b; }

/* 3-up example DT row (slide 3). */
.reveal .examples-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.6em;
  margin: 0.4em 0;
}
.reveal .examples-row .ex-card {
  padding: 0.7em 0.8em;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  text-align: center;
}
.reveal .examples-row .ex-card h3 {
  font-size: 0.85em;
  margin: 0 0 0.4em 0;
  color: #1d4ed8;
}
.reveal .examples-row .ex-card .mini-tree {
  font-size: 0.7em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: #4b5563;
  line-height: 1.5;
}
.reveal .examples-row .ex-card .mini-tree .q {
  color: #1d4ed8;
  font-weight: 700;
}
.reveal .examples-row .ex-card .mini-tree .leaf-yes { color: #166534; font-weight: 700; }
.reveal .examples-row .ex-card .mini-tree .leaf-no  { color: #991b1b; font-weight: 700; }

/* SVG mini-trees on slide 3. */
.reveal .examples-row .ex-card .mini-svg {
  display: block;
  margin: 0.3em auto 0;
  width: 100%;
  max-width: 240px;
  height: auto;
  max-height: 160px;
}
.reveal .examples-row .mini-svg .q {
  fill: #dbeafe;
  stroke: #1d4ed8;
  stroke-width: 1.5;
}
.reveal .examples-row .mini-svg .q-text {
  font-size: 10px;
  fill: #1e3a8a;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: middle;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.reveal .examples-row .mini-svg .edge {
  stroke: #9ca3af;
  stroke-width: 1.2;
}
.reveal .examples-row .mini-svg .edge-text {
  font-size: 8px;
  fill: #6b7280;
  font-style: italic;
}
.reveal .examples-row .mini-svg .leaf {
  stroke-width: 1.4;
}
.reveal .examples-row .mini-svg .leaf.yes  { fill: #dcfce7; stroke: #16a34a; }
.reveal .examples-row .mini-svg .leaf.no   { fill: #fee2e2; stroke: #dc2626; }
.reveal .examples-row .mini-svg .leaf.dog  { fill: #fef3c7; stroke: #92400e; }
.reveal .examples-row .mini-svg .leaf.cat  { fill: #dbeafe; stroke: #1d4ed8; }
.reveal .examples-row .mini-svg .leaf.fish { fill: #dcfce7; stroke: #16a34a; }
.reveal .examples-row .mini-svg .leaf.cpp  { fill: #ede9fe; stroke: #7c3aed; }
.reveal .examples-row .mini-svg .leaf.js   { fill: #fef3c7; stroke: #d97706; }
.reveal .examples-row .mini-svg .leaf.py   { fill: #dbeafe; stroke: #1d4ed8; }
.reveal .examples-row .mini-svg .leaf-text {
  font-size: 10px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: middle;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.reveal .examples-row .mini-svg .leaf-text.yes  { fill: #166534; }
.reveal .examples-row .mini-svg .leaf-text.no   { fill: #991b1b; }
.reveal .examples-row .mini-svg .leaf-text.dog  { fill: #92400e; }
.reveal .examples-row .mini-svg .leaf-text.cat  { fill: #1d4ed8; }
.reveal .examples-row .mini-svg .leaf-text.fish { fill: #166534; }
.reveal .examples-row .mini-svg .leaf-text.cpp  { fill: #5b21b6; }
.reveal .examples-row .mini-svg .leaf-text.js   { fill: #92400e; }
.reveal .examples-row .mini-svg .leaf-text.py   { fill: #1d4ed8; }