/* ============================================================
   KNOWLEDGE GRAPH — the tree of classical ML + node popups
   Layout: real <button> nodes in CSS grid; connector wires and
   cross-links are one SVG layer drawn by js/kg/graph.js from the
   nodes' live positions, so they follow every breakpoint.
   Branch accents reuse section tokens:
     supervised --ac-found · unsupervised --ac-classic · ensemble --ac-llm
   ============================================================ */

.kg-hero { padding-bottom: clamp(28px, 4vw, 44px); }
.kg-hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }

/* ---------- Toolbar ---------- */
.kg-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px;
  margin-top: 30px;
}
.kg-toggle {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--surface);
  font-size: .93rem; font-weight: 600; color: var(--text);
  transition: border-color .2s, background .2s, transform .2s;
}
.kg-toggle:hover { border-color: var(--gold); transform: translateY(-1px); }
.kg-toggle-dot {
  width: 30px; height: 18px; border-radius: 999px; position: relative; flex: none;
  background: var(--border-strong); transition: background .2s;
}
.kg-toggle-dot::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--surface); transition: transform .25s var(--ease-out);
}
.kg-toggle[aria-pressed="true"] { border-color: var(--gold-deep); background: color-mix(in srgb, var(--gold) 12%, var(--surface)); }
.kg-toggle[aria-pressed="true"] .kg-toggle-dot { background: var(--gold-deep); }
.kg-toggle[aria-pressed="true"] .kg-toggle-dot::after { transform: translateX(12px); }

/* Tree / Network switch */
.kg-views {
  display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--surface);
}
.kg-view-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 36px; padding: 7px 15px; border-radius: 999px;
  font-size: .9rem; font-weight: 600; color: var(--text-muted);
  transition: background .2s, color .2s;
}
.kg-view-btn svg { width: 17px; height: 17px; flex: none; }
.kg-view-btn:hover { color: var(--text); background: var(--grid-line); }
.kg-view-btn[aria-pressed="true"] { background: var(--navy-deep); color: var(--cream); }
[data-theme="dark"] .kg-view-btn[aria-pressed="true"] { background: var(--gold); color: var(--navy-deep); }

.kg-explored {
  display: inline-flex; align-items: center; gap: 10px; margin-left: auto;
  font-family: var(--font-mono); font-size: .8rem; color: var(--text-muted);
}
.kg-explored b { color: var(--text); font-weight: 600; }
.kg-clear {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 600;
  padding: 7px 12px; min-height: 36px; border-radius: 9px;
  border: 1px solid var(--border); color: var(--text-muted);
}
.kg-clear:hover { color: var(--text); border-color: var(--border-strong); }

/* ---------- Learning-order legend ---------- */
.kg-section { padding-top: clamp(18px, 3vw, 32px); }
.kg-order {
  margin-bottom: 26px; padding: 18px 20px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
}
.kg-order[hidden] { display: none; }
.kg-order h2 {
  font: 600 .74rem/1.2 var(--font-mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--gold-ink); margin-bottom: 12px;
}
[data-theme="dark"] .kg-order h2 { color: var(--gold); }
.kg-order ol { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 8px; list-style: none; }
.kg-step {
  display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: start;
  width: 100%; text-align: left; padding: 9px 10px; border-radius: 12px;
  border: 1px solid transparent; font-size: .9rem; line-height: 1.4; color: var(--text-muted);
}
button.kg-step:hover { background: var(--grid-line); color: var(--text); }
.kg-step[aria-pressed="true"] { border-color: var(--gold-deep); background: color-mix(in srgb, var(--gold) 10%, var(--surface)); color: var(--text); }
.kg-step-n {
  display: grid; place-items: center; width: 26px; height: 26px; border-radius: 8px;
  font: 700 .78rem/1 var(--font-mono); color: var(--navy-deep); background: var(--gold);
}
.kg-step-links { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 4px; }
.kg-step-links a { font-size: .84rem; color: var(--gold-ink); text-decoration: underline; text-underline-offset: 3px; }
[data-theme="dark"] .kg-step-links a { color: var(--gold); }
.kg-step-note { grid-column: 1 / -1; font-size: .82rem; color: var(--text-faint); margin-top: 4px; }

/* ============================================================
   THE TREE
   ============================================================ */
.kg-chart { position: relative; }
.kg-wires {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; overflow: visible; z-index: 0;
}
.kg-wire { fill: none; stroke: var(--border-strong); stroke-width: 1.5; }
.kg-wire[data-branch="sup"] { stroke: color-mix(in srgb, var(--ac-found) 55%, var(--border-strong)); }
.kg-wire[data-branch="unsup"] { stroke: color-mix(in srgb, var(--ac-classic) 55%, var(--border-strong)); }
.kg-wire[data-branch="ens"] { stroke: color-mix(in srgb, var(--ac-llm) 55%, var(--border-strong)); }
.kg-link {
  fill: none; stroke: var(--gold-deep); stroke-width: 1.6; stroke-dasharray: 5 5;
  opacity: 0; transition: opacity .3s;
}
.kg-chart.show-links .kg-link { opacity: .7; }
.kg-chart.show-links.has-hot .kg-link { opacity: .14; }
.kg-chart.show-links .kg-link.is-hot { opacity: 1; stroke-width: 2.2; }

.kg-root-row { display: flex; justify-content: center; position: relative; z-index: 1; }
.kg-branches {
  display: grid; grid-template-columns: 2fr 3fr 3fr; gap: 18px;
  margin-top: 44px; position: relative; z-index: 1;
}
.kg-branch { min-width: 0; display: flex; flex-direction: column; align-items: center; }
.kg-families {
  display: grid; gap: 12px; width: 100%; margin-top: 40px;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
}
.kg-family { min-width: 0; display: flex; flex-direction: column; align-items: stretch; }
.kg-family > .kg-node { align-self: stretch; }
.kg-leaves { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; padding-left: 14px; }

/* ---------- Nodes ---------- */
.kg-node {
  --accent: var(--gold); --accent-ink: var(--gold-ink);
  position: relative; display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 9px 14px; border-radius: 14px;
  text-align: left; line-height: 1.25; font-size: .9rem; font-weight: 600; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: transform .25s var(--ease-out), border-color .2s, box-shadow .25s, opacity .25s, background .2s;
}
.kg-node:hover, .kg-node:focus-visible {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
  box-shadow: 0 16px 34px -20px var(--accent);
}
.kg-node:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.kg-node-label { min-width: 0; overflow-wrap: break-word; hyphens: auto; }

.kg-node[data-branch="sup"] { --accent: var(--ac-found); --accent-ink: var(--ac-found-ink); }
.kg-node[data-branch="unsup"] { --accent: var(--ac-classic); --accent-ink: var(--ac-classic-ink); }
.kg-node[data-branch="ens"] { --accent: var(--ac-llm); --accent-ink: var(--ac-llm-ink); }

.kg-node.is-root {
  padding: 14px 26px; border-radius: 18px; font-family: var(--font-display);
  font-size: 1.15rem; color: var(--navy-deep); background: var(--gold); border-color: var(--gold-deep);
  box-shadow: var(--shadow-gold);
}
.kg-node.is-root:hover { background: var(--gold-bright); }
.kg-node.is-branch {
  padding: 12px 20px; font-family: var(--font-display); font-size: 1.02rem;
  background: color-mix(in srgb, var(--accent) 16%, var(--surface));
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}
.kg-node.is-family {
  justify-content: center; text-align: center; font-size: .9rem; padding-inline: 10px;
  border: 1.5px solid color-mix(in srgb, var(--accent) 60%, transparent);
  color: var(--accent-ink);
}
.kg-node.is-algo {
  width: 100%; font-weight: 500; font-size: .87rem;
  border-left: 3px solid color-mix(in srgb, var(--accent) 70%, transparent);
}

/* Learning-order badge and explored check sit on the node's corners as
   bubbles, so they never take width from the label. */
.kg-badge {
  display: none; position: absolute; top: -10px; right: -8px; z-index: 2;
  min-width: 24px; height: 20px; padding: 0 5px; border-radius: 7px; place-items: center;
  font: 700 .68rem/1 var(--font-mono); color: var(--navy-deep); background: var(--gold);
  box-shadow: 0 0 0 2px var(--bg);
}
.kg-chart.show-order .kg-badge { display: inline-grid; }
.kg-chart.show-order .kg-node.is-unordered { opacity: .55; }
.kg-chart.has-focus .kg-node:not(.is-focus):not(.is-root) { opacity: .28; }
.kg-chart.has-focus .kg-node.is-focus { border-color: var(--gold-deep); box-shadow: 0 0 0 3px color-mix(in srgb, var(--gold) 35%, transparent); }

/* Explored check */
.kg-check {
  display: none; position: absolute; top: -7px; left: -7px; z-index: 2;
  width: 18px; height: 18px; border-radius: 50%;
  place-items: center; color: var(--surface); background: #2E8B57;
  box-shadow: 0 0 0 2px var(--bg);
}
.kg-check svg { width: 11px; height: 11px; }
.kg-node.is-explored .kg-check { display: inline-grid; }
.kg-node.is-root .kg-check { background: var(--navy-deep); color: var(--gold); }

/* Hover / focus with connections on */
.kg-chart.show-links.has-hot .kg-node:not(.is-hot):not(.is-linked) { opacity: .4; }
.kg-node.is-linked { border-color: var(--gold-deep); }

.kg-footnote { margin-top: 34px; font-size: .88rem; color: var(--text-faint); max-width: 70ch; }

/* ---------- Responsive tree ---------- */
@media (max-width: 999px) {
  .kg-branches { grid-template-columns: 1fr; gap: 34px; margin-top: 30px; padding-left: 22px; }
  .kg-branch { align-items: flex-start; }
  .kg-families { margin-top: 30px; }
  .kg-explored { margin-left: 0; }
}
@media (max-width: 599px) {
  .kg-families { grid-template-columns: 1fr !important; padding-left: 20px; margin-top: 22px; gap: 22px; }
  .kg-family { align-items: flex-start; }
  .kg-family > .kg-node { align-self: flex-start; min-width: 200px; }
  .kg-leaves { width: 100%; margin-top: 14px; }
  .kg-node.is-root { font-size: 1.05rem; padding: 12px 20px; }
  .kg-toggle { flex: 1 1 auto; justify-content: center; }
  .kg-views { width: 100%; }
  .kg-view-btn { flex: 1; min-height: 40px; }
  .kg-explored { width: 100%; justify-content: space-between; }
}

/* ============================================================
   NETWORK VIEW — js/kg/network.js
   Same 43 nodes as an Obsidian-style force graph. Every colour is
   a token: --accent comes from data-branch exactly as on the tree.
   ============================================================ */
.kg-net {
  position: relative; height: clamp(460px, 72vh, 760px); overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background-color: var(--surface);
  background-image: radial-gradient(var(--border) 1.1px, transparent 1.4px);
  background-size: 24px 24px;
  box-shadow: var(--shadow-card);
}
.kg-net[hidden] { display: none; }
.kg-net[data-hot="root"] { --kg-hot: var(--gold-deep); }
.kg-net[data-hot="sup"] { --kg-hot: var(--ac-found); }
.kg-net[data-hot="unsup"] { --kg-hot: var(--ac-classic); }
.kg-net[data-hot="ens"] { --kg-hot: var(--ac-llm); }

.kg-net-svg {
  display: block; width: 100%; height: 100%;
  touch-action: pan-y; cursor: grab; user-select: none; -webkit-user-select: none;
}
.kg-net-svg.is-zoomed { touch-action: none; }
.kg-net-svg.is-panning, .kg-net.is-dragging .kg-net-svg { cursor: grabbing; }

/* Edges */
.kg-net-edge {
  stroke: var(--border-strong); stroke-width: 1.1; vector-effect: non-scaling-stroke;
  transition: opacity .25s, stroke .25s;
}
.kg-net-edge[data-type="tree"] { stroke-width: 1.7; stroke: color-mix(in srgb, var(--gold-deep) 55%, var(--border-strong)); }
.kg-net-edge[data-type="tree"][data-branch="sup"] { stroke: color-mix(in srgb, var(--ac-found) 55%, var(--border-strong)); }
.kg-net-edge[data-type="tree"][data-branch="unsup"] { stroke: color-mix(in srgb, var(--ac-classic) 55%, var(--border-strong)); }
.kg-net-edge[data-type="tree"][data-branch="ens"] { stroke: color-mix(in srgb, var(--ac-llm) 55%, var(--border-strong)); }
.kg-net-edge[data-type="related"] { opacity: .75; }
.kg-net-edge[data-type="link"] { stroke: var(--gold-deep); stroke-width: 1.6; stroke-dasharray: 5 5; visibility: hidden; }
.kg-net.show-links .kg-net-edge[data-type="link"] { visibility: visible; }

/* Nodes */
.kg-net-node { --accent: var(--gold); cursor: pointer; outline: none; touch-action: none; transition: opacity .25s; }
.kg-net-node[data-branch="sup"] { --accent: var(--ac-found); }
.kg-net-node[data-branch="unsup"] { --accent: var(--ac-classic); }
.kg-net-node[data-branch="ens"] { --accent: var(--ac-llm); }
.kg-net-dot { fill: var(--accent); stroke: var(--surface); stroke-width: 2; vector-effect: non-scaling-stroke; }
.kg-net-node.is-root .kg-net-dot { fill: var(--gold); stroke: var(--gold-deep); }
.kg-net-node.is-branch .kg-net-dot { stroke: color-mix(in srgb, var(--accent) 45%, var(--surface)); stroke-width: 3; }
.kg-net-halo {
  fill: color-mix(in srgb, var(--accent) 14%, transparent); stroke: var(--accent); stroke-width: 1.5;
  vector-effect: non-scaling-stroke; opacity: 0; transition: opacity .2s;
}
.kg-net-node:hover .kg-net-halo, .kg-net-node.is-hot .kg-net-halo { opacity: .7; }
.kg-net-node:focus-visible .kg-net-halo { opacity: 1; stroke-width: 2.5; }
.kg-net-node.is-hot .kg-net-dot { filter: drop-shadow(0 0 6px var(--accent)); }
.kg-net-ring { fill: none; stroke: #2E8B57; stroke-width: 2; vector-effect: non-scaling-stroke; display: none; }
.kg-net-node.is-explored .kg-net-ring { display: inline; }

.kg-net-label {
  font-family: var(--font-body); font-size: calc(var(--kg-ls, 1) * 11px); font-weight: 500;
  fill: var(--text-muted); text-anchor: middle; dominant-baseline: hanging;
  paint-order: stroke; stroke: var(--surface); stroke-width: calc(var(--kg-ls, 1) * 3.5px); stroke-linejoin: round;
  pointer-events: none; transition: opacity .2s, fill .2s;
}
.kg-net-node.is-family .kg-net-label { font-size: calc(var(--kg-ls, 1) * 12px); font-weight: 650; fill: var(--text); }
.kg-net-node.is-branch .kg-net-label,
.kg-net-node.is-root .kg-net-label { font-family: var(--font-display); font-size: calc(var(--kg-ls, 1) * 14px); font-weight: 650; fill: var(--text); }
.kg-net-svg.is-far .kg-net-node.is-algo:not(.is-hot):not(.is-near):not(.is-focus) .kg-net-label { opacity: 0; }
.kg-net-node.is-hot .kg-net-label, .kg-net-node.is-near .kg-net-label { fill: var(--text); }

/* Hover / focus: the node, its neighbours and the signals between them */
.kg-net.has-hot .kg-net-node:not(.is-hot):not(.is-near) { opacity: .16; }
.kg-net.has-hot .kg-net-edge:not(.is-hot) { opacity: .07; }
.kg-net-edge.is-hot {
  opacity: 1; stroke: var(--kg-hot, var(--gold-deep)); stroke-width: 2.2;
  stroke-dasharray: 4 6; animation: kg-signal .9s linear infinite;
}
.kg-net-edge.is-hot.is-in { animation-direction: reverse; }
.kg-net-edge[data-type="link"].is-hot { stroke: var(--gold-deep); }
@keyframes kg-signal { to { stroke-dashoffset: -20; } }

/* Learning order and step focus mirror the tree */
.kg-net-badge { display: none; pointer-events: none; }
.kg-net-badge rect { fill: var(--gold); stroke: var(--surface); stroke-width: 1.5; }
.kg-net-badge text { font: 700 9.5px/1 var(--font-mono); fill: var(--navy-deep); text-anchor: middle; dominant-baseline: central; }
.kg-net.show-order .kg-net-badge { display: inline; }
.kg-net.show-order .kg-net-node.is-unordered { opacity: .45; }
.kg-net.has-focus .kg-net-node:not(.is-focus):not(.is-root) { opacity: .2; }
.kg-net.has-focus .kg-net-node.is-focus .kg-net-halo { opacity: 1; stroke: var(--gold-deep); }

/* Overlay controls */
.kg-net-tools { position: absolute; right: 12px; bottom: 12px; display: flex; flex-direction: column; gap: 6px; }
.kg-net-tools .icon-btn { background: var(--surface); box-shadow: var(--shadow-card); }
.kg-net-tools .icon-btn svg { width: 18px; height: 18px; }
.kg-net-legend {
  position: absolute; left: 12px; bottom: 12px; display: flex; flex-wrap: wrap; gap: 4px 12px;
  max-width: calc(100% - 80px); padding: 7px 12px; border-radius: 12px;
  background: color-mix(in srgb, var(--surface) 88%, transparent); border: 1px solid var(--border);
  font: 600 .72rem/1.3 var(--font-mono); letter-spacing: .04em; color: var(--text-muted);
  pointer-events: none;
}
.kg-net-legend span { display: inline-flex; align-items: center; gap: 6px; }
.kg-net-legend span::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.kg-net-legend [data-branch="sup"] { --accent: var(--ac-found); }
.kg-net-legend [data-branch="unsup"] { --accent: var(--ac-classic); }
.kg-net-legend [data-branch="ens"] { --accent: var(--ac-llm); }
.kg-net-hint {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  padding: 7px 14px; border-radius: 999px; background: var(--navy-deep); color: var(--cream);
  font-size: .82rem; font-weight: 600; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .25s;
}
.kg-net.show-hint .kg-net-hint { opacity: .94; }

@media (max-width: 599px) {
  .kg-net { height: clamp(380px, 120vw, 68vh); }
  .kg-net-tools { top: 10px; right: 10px; bottom: auto; flex-direction: row; }
  .kg-net-legend { left: 10px; bottom: 10px; max-width: calc(100% - 20px); font-size: .62rem; gap: 2px 10px; padding: 6px 10px; }
}
@media (pointer: coarse) {
  .kg-net-tools .icon-btn { width: 44px; height: 44px; }
}

/* ============================================================
   NODE POPUP
   ============================================================ */
.kg-dialog {
  --accent: var(--gold); --accent-ink: var(--gold-ink);
  width: min(1100px, calc(100vw - 32px)); height: calc(100vh - 32px); max-height: calc(100vh - 32px);
  margin: auto; padding: 0; overflow: hidden;
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  color: var(--text); background: var(--bg);
  box-shadow: 0 40px 110px -30px rgba(7,14,32,.6);
}
.kg-dialog[data-branch="sup"] { --accent: var(--ac-found); --accent-ink: var(--ac-found-ink); }
.kg-dialog[data-branch="unsup"] { --accent: var(--ac-classic); --accent-ink: var(--ac-classic-ink); }
.kg-dialog[data-branch="ens"] { --accent: var(--ac-llm); --accent-ink: var(--ac-llm-ink); }
.kg-dialog::backdrop { background: rgba(7,14,32,.62); backdrop-filter: blur(6px); }
.kg-dialog[open] { display: flex; flex-direction: column; animation: kg-pop .32s var(--ease-out) both; }
@keyframes kg-pop { from { opacity: 0; transform: translateY(14px) scale(.985); } }

.kg-d-head {
  flex: none; padding: 16px clamp(18px, 3vw, 32px) 18px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  border-top: 4px solid var(--accent);
}
.kg-d-bar { display: flex; align-items: center; gap: 10px; }
.kg-crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 4px; min-width: 0; flex: 1; }
.kg-crumb {
  font: 600 .72rem/1.3 var(--font-mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-subtle); padding: 6px 6px; border-radius: 7px; min-height: 30px;
}
button.kg-crumb:hover { color: var(--accent-ink); background: var(--grid-line); }
.kg-crumb[aria-current] { color: var(--accent-ink); }
.kg-crumb-sep { color: var(--text-faint); font-size: .8rem; }
.kg-d-actions { display: flex; gap: 6px; flex: none; }
.kg-d-actions .icon-btn { width: 40px; height: 40px; font-size: 1.15rem; }
.kg-d-title-row { display: flex; align-items: flex-start; gap: 14px; margin-top: 8px; }
.kg-d-head h2 { font-size: clamp(1.45rem, 3vw, 2.15rem); }
.kg-d-head h2:focus { outline: none; }
.kg-d-tag { margin-top: 6px; color: var(--text-muted); font-size: 1.02rem; max-width: 70ch; }
.kg-d-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.kg-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; min-height: 28px;
  font: 600 .7rem/1.2 var(--font-mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent-ink); background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
}
.kg-chip.is-gold { color: var(--gold-ink); background: color-mix(in srgb, var(--gold) 14%, transparent); border-color: color-mix(in srgb, var(--gold) 45%, transparent); }
[data-theme="dark"] .kg-chip.is-gold { color: var(--gold); }

.kg-d-body {
  flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain;
  padding: clamp(18px, 3vw, 30px) clamp(18px, 3vw, 32px) 40px;
}
.kg-d-body > * + * { margin-top: 30px; }
.kg-d-body h3 {
  font: 600 .74rem/1.2 var(--font-mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent-ink); margin-bottom: 12px;
}
.kg-what { font-size: 1.08rem; line-height: 1.7; max-width: 76ch; }
.kg-what b, .kg-d-body li b { font-weight: 650; color: var(--text); }
.kg-d-body code {
  font-family: var(--font-mono); font-size: .86em;
  background: color-mix(in srgb, var(--accent) 9%, transparent); padding: 1px 6px; border-radius: 6px;
}
.kg-d-body pre code { background: none; padding: 0; font-size: inherit; }

.kg-try {
  display: grid; gap: 6px; margin-bottom: 4px; padding: 14px 16px;
  border-radius: var(--radius); background: var(--surface);
  border: 1px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
}
.kg-try li { position: relative; padding-left: 22px; font-size: .95rem; color: var(--text-muted); line-height: 1.55; }
.kg-try li::before { content: "→"; position: absolute; left: 0; color: var(--accent-ink); font-weight: 700; }
.kg-figure.viz { margin-block: 14px 0; }

.kg-d-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.kg-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 22px;
}
.kg-steps { counter-reset: kgs; display: grid; gap: 10px; list-style: none; }
.kg-steps li {
  counter-increment: kgs; position: relative; padding-left: 34px;
  font-size: .95rem; line-height: 1.6; color: var(--text-muted);
}
.kg-steps li::before {
  content: counter(kgs); position: absolute; left: 0; top: 1px;
  width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center;
  font: 700 .72rem/1 var(--font-mono); color: var(--accent-ink);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.kg-params { display: grid; gap: 12px; }
.kg-params dt { font-family: var(--font-mono); font-size: .84rem; font-weight: 600; color: var(--text); }
.kg-params dd { margin: 2px 0 0; font-size: .92rem; line-height: 1.55; color: var(--text-muted); }
.kg-d-body .decision-grid { margin: 0; }
.kg-pitfalls ul { display: grid; gap: 10px; }
.kg-pitfalls li {
  padding: 12px 16px; border-radius: 12px; background: var(--surface);
  border: 1px solid var(--border); border-left: 3px solid color-mix(in srgb, #C0453C 60%, transparent);
  font-size: .94rem; line-height: 1.6; color: var(--text-muted);
}
.kg-d-body .code-block { margin: 0; }
.kg-code-note { margin-top: 8px; font-size: .82rem; color: var(--text-faint); }

.kg-d-foot { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 18px; padding-top: 22px; border-top: 1px solid var(--border); }
.kg-related { display: flex; flex-wrap: wrap; gap: 8px; }
.kg-rel {
  --accent: var(--gold); --accent-ink: var(--gold-ink);
  display: inline-flex; align-items: center; gap: 7px; min-height: 40px;
  padding: 8px 14px; border-radius: 999px; font-size: .88rem; font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--border)); background: var(--surface);
  transition: border-color .2s, transform .2s;
}
.kg-rel[data-branch="sup"] { --accent: var(--ac-found); }
.kg-rel[data-branch="unsup"] { --accent: var(--ac-classic); }
.kg-rel[data-branch="ens"] { --accent: var(--ac-llm); }
.kg-rel::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.kg-rel:hover { border-color: var(--accent); transform: translateY(-1px); }

/* Segmented toggles inside widgets */
.kg-seg { display: flex; flex-direction: column; gap: 7px; }
.kg-seg-row { display: flex; flex-wrap: wrap; gap: 6px; }
.kg-seg-btn[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  color: var(--accent-ink, var(--accent));
}

@media (max-width: 760px) {
  .kg-d-cols { grid-template-columns: 1fr; }
  .kg-d-body .decision-grid { grid-template-columns: 1fr; }
}
@media (max-width: 599px) {
  .kg-dialog { width: 100vw; height: 100dvh; max-width: 100vw; max-height: 100dvh; border-radius: 0; border: 0; }
  .kg-d-head { padding: 10px 14px 12px; }
  .kg-crumbs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .kg-crumbs::-webkit-scrollbar { display: none; }
  .kg-crumb { font-size: .62rem; padding: 5px 3px; white-space: nowrap; }
  .kg-d-actions .icon-btn { width: 36px; height: 36px; }
  .kg-d-title-row { margin-top: 4px; }
  .kg-d-head h2 { font-size: 1.35rem; margin-top: 2px; }
  .kg-d-tag { font-size: .92rem; margin-top: 4px; }
  .kg-d-chips { margin-top: 8px; gap: 4px; }
  .kg-chip { font-size: .6rem; min-height: 24px; padding: 3px 8px; }
  .kg-d-body { padding: 18px 14px 32px; }
  .kg-what { font-size: 1rem; }
  .kg-panel { padding: 16px; }
  .kg-figure .viz-stage { overflow-x: hidden; }
  .kg-figure .viz-canvas { min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .kg-dialog[open] { animation: none; }
  .kg-net-edge.is-hot { animation: none; stroke-dasharray: none; }
}
@media (forced-colors: active) {
  .kg-node, .kg-toggle, .kg-rel, .kg-view-btn { border: 1px solid ButtonText; }
  .kg-net-edge { stroke: CanvasText; }
  .kg-net-dot { fill: CanvasText; stroke: Canvas; }
  .kg-net-label { fill: CanvasText; stroke: Canvas; }
  .kg-net-node:focus-visible .kg-net-halo { stroke: Highlight; }
}