/* ==========================================================================
   atlas-edn · DiagnosticTree (moteur générique partagé)
   Styles + animations pour les arbres diagnostiques data-driven.
   API : window.DiagnosticTree.mount(host, treeData)
   Préfixe `dxt-` (pour éviter toute collision avec le legacy `dt-` / `diagtree-`).
   ========================================================================== */

.dxt-tree {
  --dxt-ok:           var(--ok, #4e6a2f);
  --dxt-warn:         var(--warn, #8a5a12);
  --dxt-danger:       var(--danger, #a52a1a);
  --dxt-grey:         var(--grey, var(--ink-muted, #5a6e7e));
  --dxt-bg-card:      var(--paper, var(--bg-card, #faf6ec));
  --dxt-bg-2:         var(--bg-2, #ece5d6);
  --dxt-paper-2:      var(--paper-2, #fffcf5);
  --dxt-ink:          var(--ink, #1a1713);
  --dxt-ink-2:        var(--ink-2, #524a3e);
  --dxt-ink-3:        var(--ink-3, #8a8270);
  --dxt-rule:         var(--rule, var(--accent-dash, #d7ccb4));
  --dxt-accent-dash:  var(--accent-dash, #c4b898);
  --dxt-bg-dark:      var(--bg-dark, #1a1713);
  --dxt-paper-inv:    var(--ink-inverse, #faf6ec);

  position: relative;
  width: 100%;
  font-family: var(--font-sans);
  box-sizing: border-box;
  color: var(--dxt-ink);
  overflow-x: auto;
}

.dxt-header {
  margin-bottom: 12px;
}
.dxt-meta-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 16px;
  color: var(--dxt-ink);
  margin: 0 0 4px;
}
.dxt-meta-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .03em;
  color: var(--dxt-ink-3);
  margin: 0;
}

/* ---------- Toolbar ---------- */
.dxt-toolbar {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 12px;
}
.dxt-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  padding: 6px 12px;
  background: var(--dxt-bg-2);
  border: 1px solid var(--dxt-rule);
  border-radius: 3px;
  color: var(--dxt-ink-2);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}
.dxt-btn:hover,
.dxt-btn:focus-visible {
  background: var(--dxt-ink);
  color: var(--dxt-paper-inv);
  border-color: var(--dxt-ink);
  outline: none;
}

/* ---------- SVG canvas ---------- */
.dxt-svg-wrap {
  position: relative;
  width: 100%;
  height: clamp(480px, 70vh, 760px);
  overflow: hidden;
  border: 1px dashed var(--dxt-accent-dash);
  border-radius: 3px;
  background: var(--dxt-paper-2);
  cursor: grab;
  user-select: none;
  touch-action: none;
}
.dxt-svg-wrap.is-grabbing { cursor: grabbing; }

.dxt-svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

/* ---------- Edges ---------- */
.dxt-edge {
  fill: none;
  stroke: var(--dxt-accent-dash);
  stroke-width: 1.6;
  stroke-dasharray: 5 4;
  transition: opacity 220ms ease, stroke-width 200ms ease;
}
.dxt-edge-ok     { stroke: var(--dxt-ok); }
.dxt-edge-warn   { stroke: var(--dxt-warn); }
.dxt-edge-danger { stroke: var(--dxt-danger); }
.dxt-edge-grey   { stroke: var(--dxt-grey); }

.dxt-arrow-ok     { fill: var(--dxt-ok); }
.dxt-arrow-warn   { fill: var(--dxt-warn); }
.dxt-arrow-danger { fill: var(--dxt-danger); }
.dxt-arrow-grey   { fill: var(--dxt-grey); }

/* Labels d'arêtes (SVG <text>) — halo crème + fill foncé pour lisibilité.
   v5 : poids 700, fill plus foncé (#3a2f1f) et stroke 7px pour un halo
   nettement visible même quand 2 labels se chevauchent ou passent sur des
   pointillés. Hardcodé en hex car SVG vit dans .dxt-tree, mais on durcit
   avec !important pour éviter toute surcharge d'autres feuilles de style. */
.dxt-edge-label {
  font-family: var(--font-mono, monospace);
  font-size: 12px !important;
  font-weight: 700 !important;
  letter-spacing: .02em;
  fill: #3a2f1f !important;
  filter: url(#dxt-halo-light);
  pointer-events: none;
  user-select: none;
  transition: opacity 220ms ease;
}

/* ---------- Nodes ---------- */
.dxt-node {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  border-radius: 4px;
  padding: 8px 12px;
  display: flex; flex-direction: column; justify-content: center;
  background: var(--dxt-bg-card);
  border: 1px solid var(--dxt-rule);
  font-family: var(--font-sans);
  transition: opacity 320ms ease-out, transform 320ms ease-out, box-shadow 200ms ease, background 200ms ease;
  overflow: hidden;
}
.dxt-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 13.5px;
  color: var(--dxt-ink);
  line-height: 1.18;
}
.dxt-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .03em;
  color: var(--dxt-ink-3);
  margin-top: 4px;
  line-height: 1.3;
}

.dxt-node-root {
  background: var(--dxt-bg-dark);
  border-color: var(--dxt-bg-dark);
  text-align: center;
  align-items: center;
}
.dxt-node-root .dxt-title { color: var(--dxt-paper-inv); font-size: 15.5px; font-weight: 600; }
.dxt-node-root .dxt-sub   { color: var(--dxt-paper-inv); opacity: .75; }

.dxt-node-question {
  background: var(--dxt-bg-2);
  border: 1.5px dashed var(--dxt-accent-dash);
  align-items: center; text-align: center;
}
.dxt-node-question .dxt-title { font-style: italic; }

.dxt-node-terminal {
  border-left: 4px solid var(--dxt-mk, var(--dxt-ink));
}
.dxt-node-terminal.dxt-color-ok     { --dxt-mk: var(--dxt-ok); }
.dxt-node-terminal.dxt-color-warn   { --dxt-mk: var(--dxt-warn); }
.dxt-node-terminal.dxt-color-danger { --dxt-mk: var(--dxt-danger); }
.dxt-node-terminal.dxt-color-grey   { --dxt-mk: var(--dxt-grey); }
.dxt-node-terminal .dxt-title { color: var(--dxt-mk, var(--dxt-ink)); }

.dxt-node-terminal.dxt-clickable {
  cursor: pointer;
}
.dxt-node-terminal.dxt-clickable:hover,
.dxt-node-terminal.dxt-clickable:focus-visible {
  background: var(--dxt-paper-2);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 4px 14px color-mix(in oklab, var(--dxt-mk, var(--dxt-ink)) 22%, transparent);
  outline: none;
}

/* ---------- Caret (collapse toggle) ---------- */
.dxt-caret {
  position: absolute;
  top: 4px; right: 6px;
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; line-height: 1;
  color: var(--dxt-ink-3);
  cursor: pointer;
  border: 0; background: transparent;
  border-radius: 50%;
  padding: 0;
  font-family: var(--font-mono);
}
.dxt-caret:hover,
.dxt-caret:focus-visible {
  color: var(--dxt-ink); background: var(--dxt-paper-2);
  outline: none;
}

/* ---------- Animation A : déploiement progressif ---------- */
.dxt-hidden { opacity: 0; }
.dxt-node.dxt-hidden { transform: translateY(8px); }
.dxt-edge.dxt-hidden,
.dxt-edge-label.dxt-hidden { opacity: 0; }

.dxt-edge {
  /* runtime sets stroke-dasharray + stroke-dashoffset for the line-draw effect */
  transition: opacity 220ms ease, stroke-dashoffset 500ms ease-out;
}

/* ---------- Hover : path active / dimmed ---------- */
.dxt-tree.dxt-has-active .dxt-node:not(.dxt-path-active),
.dxt-tree.dxt-has-active .dxt-edge:not(.dxt-path-active),
.dxt-tree.dxt-has-active .dxt-edge-label:not(.dxt-path-active) {
  opacity: 0.22;
}
.dxt-tree.dxt-has-active .dxt-edge.dxt-path-active {
  stroke-width: 2.2;
}
.dxt-tree.dxt-has-active .dxt-node-terminal.dxt-path-active .dxt-title {
  font-weight: 600;
}

/* ---------- Animation B : collapsed ---------- */
/* v3.1 — vrai masquage (plus de fantômes à 12%). visibility:hidden retire
   l'élément du hit-testing, du focus et fonctionne en SVG (path, text) ET
   en HTML (foreignObject .dxt-node). Transition asymétrique sur visibility :
   - au collapse (ajout de la classe) : visibility passe à hidden APRÈS les
     280ms du fade-out de l'opacity (delay 280ms) → fade fluide complet
   - au expand (retrait de la classe) : visibility revient à visible
     immédiatement (pas de transition côté retrait) → l'élément est visible
     pendant que l'opacity remonte de 0 à 1 → fade-in fluide complet */
.dxt-collapsed {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transition: opacity 280ms ease, visibility 0s linear 280ms;
}

/* ---------- Legend ---------- */
.dxt-legend {
  margin-top: 14px;
  display: flex; gap: 18px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--dxt-ink-2);
  padding: 10px 14px;
  background: var(--dxt-bg-2);
  border-radius: 3px;
}
.dxt-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.dxt-legend-item::before {
  content: ''; display: inline-block;
  width: 14px; height: 4px; border-radius: 2px;
  background: var(--dxt-leg, var(--dxt-ink));
}
.dxt-legend-item.dxt-leg-ok     { --dxt-leg: var(--dxt-ok); }
.dxt-legend-item.dxt-leg-warn   { --dxt-leg: var(--dxt-warn); }
.dxt-legend-item.dxt-leg-danger { --dxt-leg: var(--dxt-danger); }
.dxt-legend-item.dxt-leg-grey   { --dxt-leg: var(--dxt-grey); }

/* ==========================================================================
   POP-UP DÉTAIL TERMINAL — version hardenée (FIX #2)
   --------------------------------------------------------------------------
   Bug d'origine : la pop-up est appendChild dans <body> (point d'injection
   correct), mais ses règles utilisaient `var(--dxt-bg-card)`. Les variables
   `--dxt-*` ne sont déclarées qu'à l'intérieur de `.dxt-tree`, et la pop-up
   échappe à ce scope car elle est body-level. Résultat : `var(--dxt-bg-card)`
   indéfini → declaration invalide → background tombe sur `transparent`
   (valeur initiale CSS).
   Solution : hexadécimaux explicites + !important + couleurs accent calculées
   par variable indépendante (`--dxt-popup-mk`).
   ========================================================================== */

/* v5 — durcissement : isolation forcée + spécificité html body pour gagner
   contre toute règle parasite extérieure ; couleur de fallback opaque si
   backdrop-filter est désactivé (Firefox sans -moz-* ou config "privacy"). */
.dxt-popup-overlay,
html body .dxt-popup-overlay {
  position: fixed !important;
  inset: 0 !important;
  top: 0 !important; right: 0 !important; bottom: 0 !important; left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(20, 17, 13, 0.55) !important;
  background-color: rgba(20, 17, 13, 0.55) !important;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  display: flex !important;
  align-items: center;
  justify-content: center;
  z-index: 2147483646 !important;            /* z-index max - 1 (32-bit signed) */
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
  isolation: isolate !important;             /* casse tout stacking context parent */
  contain: none !important;                  /* protège contre 'contain: paint/layout' parent */
  transform: none !important;                /* annule un transform hérité éventuel */
  filter: none !important;
  will-change: opacity;
}
.dxt-popup-overlay.is-open,
html body .dxt-popup-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}
/* Fallback navigateurs sans backdrop-filter : on assombrit le fond davantage. */
@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
  .dxt-popup-overlay,
  html body .dxt-popup-overlay {
    background: rgba(20, 17, 13, 0.78) !important;
    background-color: rgba(20, 17, 13, 0.78) !important;
  }
}

/* Couleur accent — utilisée pour le liseré gauche + la couleur du titre.
   On utilise une variable PROPRE à la pop-up (--dxt-popup-mk) plutôt que
   --dxt-mk qui dépend de --dxt-* indéfinies à ce niveau. */
.dxt-popup-overlay                       { --dxt-popup-mk: #1a1713; }
.dxt-popup-overlay.dxt-color-ok          { --dxt-popup-mk: #4e6a2f; }
.dxt-popup-overlay.dxt-color-warn        { --dxt-popup-mk: #8a5a12; }
.dxt-popup-overlay.dxt-color-danger      { --dxt-popup-mk: #a52a1a; }
.dxt-popup-overlay.dxt-color-grey        { --dxt-popup-mk: #5a6e7e; }

.dxt-popup,
html body .dxt-popup-overlay .dxt-popup {
  position: relative;
  background: #faf6ec !important;
  background-color: #faf6ec !important;
  background-image: none !important;          /* annule un background-image hérité */
  color: #1a1713 !important;
  border: 1px solid #c4b898 !important;
  border-left: 5px solid var(--dxt-popup-mk, #1a1713) !important;
  border-radius: 8px;
  padding: 28px 32px;
  width: min(92vw, 600px);
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35),
              0 4px 12px rgba(0, 0, 0, 0.18);
  font-family: var(--font-sans, system-ui);
  transform: translateY(8px);
  transition: transform 220ms ease;
  z-index: 2147483647 !important;             /* z-index max (32-bit signed) */
  opacity: 1 !important;                       /* protège contre opacity parent */
  filter: none !important;
}
.dxt-popup-overlay.is-open .dxt-popup,
html body .dxt-popup-overlay.is-open .dxt-popup { transform: translateY(0); }

/* Empêche tout enfant de re-créer un fond translucide qui ferait apparaître
   l'arbre derrière. Les enfants n'ont pas besoin de leur propre background. */
.dxt-popup > *,
html body .dxt-popup > * {
  background-color: transparent !important;
}

.dxt-popup-title {
  font-family: var(--font-serif, Georgia);
  font-weight: 500;
  font-size: 22px;
  color: var(--dxt-popup-mk, #1a1713) !important;
  margin: 0 0 6px;
  padding-right: 36px;
  line-height: 1.2;
}
.dxt-popup-sub {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  letter-spacing: .04em;
  color: #6b5e45 !important;
  margin: 0 0 18px;
  padding-right: 36px;
}
.dxt-popup-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: transparent;
  border: 0;
  font-size: 22px;
  color: #6b5e45;
  cursor: pointer;
  padding: 4px 10px;
  line-height: 1;
  border-radius: 3px;
}
.dxt-popup-close:hover,
.dxt-popup-close:focus-visible {
  color: #1a1713;
  background: #ece5d6;
  outline: none;
}

.dxt-popup-section { margin-bottom: 14px; }
.dxt-popup-section h4 {
  font-family: var(--font-mono, monospace);
  text-transform: uppercase;
  font-size: 10.5px;
  letter-spacing: .12em;
  color: #8a8270 !important;
  margin: 0 0 6px;
}
.dxt-popup-section p,
.dxt-popup-section ul {
  font-size: 13px;
  line-height: 1.5;
  color: #524a3e !important;
  margin: 0;
}
.dxt-popup-section ul { padding-left: 20px; }
.dxt-popup-section li { margin-bottom: 4px; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .dxt-node,
  .dxt-edge,
  .dxt-edge-label,
  .dxt-popup,
  .dxt-popup-overlay,
  .dxt-collapsed {
    animation: none !important;
    transition: none !important;
  }
  .dxt-hidden {
    opacity: 1 !important;
    transform: none !important;
    stroke-dashoffset: 0 !important;
  }
}

/* ==========================================================================
   v3 — Système deux vues (globale + focale)
   ========================================================================== */

/* ---------- Sélecteur de vue (toujours présent) ---------- */
.dxt-view-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--dxt-rule);
}
.dxt-view-btn {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .03em;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--dxt-rule);
  border-radius: 999px;
  color: var(--dxt-ink-2);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}
.dxt-view-btn:hover,
.dxt-view-btn:focus-visible {
  background: var(--dxt-bg-2);
  color: var(--dxt-ink);
  border-color: var(--dxt-ink);
  outline: none;
}
.dxt-view-btn-active {
  background: var(--dxt-ink);
  color: var(--dxt-paper-inv);
  border-color: var(--dxt-ink);
}
.dxt-view-btn-color-ok.dxt-view-btn-active     { background: var(--dxt-ok);     border-color: var(--dxt-ok); }
.dxt-view-btn-color-warn.dxt-view-btn-active   { background: var(--dxt-warn);   border-color: var(--dxt-warn); }
.dxt-view-btn-color-danger.dxt-view-btn-active { background: var(--dxt-danger); border-color: var(--dxt-danger); }
.dxt-view-btn-color-grey.dxt-view-btn-active   { background: var(--dxt-grey);   border-color: var(--dxt-grey); }

/* ---------- Conteneur de contenu (mode-dépendant) ---------- */
.dxt-content {
  position: relative;
  transition: opacity 200ms ease;
}
.dxt-content.dxt-fading-out {
  opacity: 0;
}

/* ==========================================================================
   Mode 'global' — vue d'ensemble synthétique
   ========================================================================== */

.dxt-overview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: 100%;
  padding: 8px 0 12px;
}

.dxt-overview-root {
  width: min(100%, 320px);
}
.dxt-overview-root .dxt-node-root {
  /* Réutilise la définition de .dxt-node-root déjà présente plus haut. */
  padding: 14px 18px;
  text-align: center;
  align-items: center;
  border-radius: 6px;
  display: flex; flex-direction: column; justify-content: center;
  min-height: 64px;
  background: var(--dxt-bg-dark);
  border: 1px solid var(--dxt-bg-dark);
}
.dxt-overview-root .dxt-node-root .dxt-title {
  color: var(--dxt-paper-inv); font-size: 16px; font-weight: 600;
  font-family: var(--font-serif);
}
.dxt-overview-root .dxt-node-root .dxt-sub {
  color: var(--dxt-paper-inv); opacity: .75;
  font-family: var(--font-mono); font-size: 10.5px;
  margin-top: 4px; letter-spacing: .03em;
}

/* Petit SVG décoratif des connexions (root → cartes). */
.dxt-overview-edges-wrap {
  width: 100%;
  max-width: 920px;
  height: 60px;
}
.dxt-overview-svg-edges {
  width: 100%;
  height: 60px;
  display: block;
}

/* Rangée des 3 cartes-branches. */
.dxt-overview-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
}

.dxt-branch-card {
  --dxt-mk: var(--dxt-ink);
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 18px 22px;
  background: var(--dxt-bg-card);
  border: 1px solid var(--dxt-rule);
  border-left: 6px solid var(--dxt-mk);
  border-radius: 12px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: transform 220ms ease, box-shadow 220ms ease, background 200ms ease, border-color 200ms ease;
  min-height: 200px;
}
.dxt-branch-card:hover,
.dxt-branch-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  background: var(--dxt-paper-2);
  outline: none;
}
.dxt-branch-card.dxt-color-ok     { --dxt-mk: var(--dxt-ok); }
.dxt-branch-card.dxt-color-warn   { --dxt-mk: var(--dxt-warn); }
.dxt-branch-card.dxt-color-danger { --dxt-mk: var(--dxt-danger); }
.dxt-branch-card.dxt-color-grey   { --dxt-mk: var(--dxt-grey); }

.dxt-branch-card-edge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--dxt-ink-3);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.dxt-branch-card-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: .03em;
  color: var(--dxt-mk);
  margin-bottom: 6px;
  line-height: 1.15;
}
.dxt-branch-card-pivot {
  font-family: var(--font-sans);
  font-size: 13px;
  font-style: italic;
  color: var(--dxt-ink-2);
  margin-bottom: 14px;
  line-height: 1.35;
}
.dxt-branch-card-counts {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  flex: 1;
}
.dxt-branch-card-total {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--dxt-ink);
}
.dxt-branch-card-dots {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.dxt-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--dxt-leg, var(--dxt-ink));
  color: var(--dxt-paper-inv);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
}
.dxt-dot-ok     { --dxt-leg: var(--dxt-ok); }
.dxt-dot-warn   { --dxt-leg: var(--dxt-warn); }
.dxt-dot-danger { --dxt-leg: var(--dxt-danger); }
.dxt-dot-grey   { --dxt-leg: var(--dxt-grey); }

.dxt-branch-card-cta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--dxt-mk);
  font-weight: 500;
  align-self: flex-start;
  border-top: 1px dashed var(--dxt-rule);
  padding-top: 10px;
  width: 100%;
}

/* Animation de cascade en vue d'ensemble. */
.dxt-anim {
  opacity: 0;
  transform: translateY(8px);
  animation: dxt-fadein 380ms cubic-bezier(.25, .7, .3, 1) forwards;
}
.dxt-anim-step-0 { animation-delay: 0ms; }
.dxt-anim-step-1 { animation-delay: 200ms; }
.dxt-anim-step-2 { animation-delay: 400ms; }
.dxt-anim-step-3 { animation-delay: 500ms; }
.dxt-anim-step-4 { animation-delay: 600ms; }

@keyframes dxt-fadein {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Mode 'focal' — une seule branche affichée en grand
   ========================================================================== */

.dxt-focal-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  min-height: 56px;
}
.dxt-back-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  background: transparent;
  border: 1px solid transparent;
  color: var(--dxt-ink-2);
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 4px;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
  white-space: nowrap;
  animation: dxt-slidein-left 280ms ease-out both;
}
.dxt-back-btn:hover,
.dxt-back-btn:focus-visible {
  background: var(--dxt-bg-card);
  color: var(--dxt-ink);
  border-color: var(--dxt-rule);
  outline: none;
}
@keyframes dxt-slidein-left {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: translateX(0); }
}

.dxt-focal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--dxt-ink);
}
.dxt-focal-title strong {
  font-weight: 600;
  letter-spacing: .04em;
}
.dxt-focal-title-edge {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dxt-ink-3);
  margin-left: 6px;
}

/* Mini-map contextuelle (coin sup. droit). */
.dxt-minimap {
  display: flex;
  gap: 6px;
  padding: 6px 8px;
  background: var(--dxt-bg-2);
  border: 1px solid var(--dxt-rule);
  border-radius: 999px;
  animation: dxt-slidein-right 280ms ease-out both;
}
@keyframes dxt-slidein-right {
  from { opacity: 0; transform: translateX(8px); }
  to   { opacity: 1; transform: translateX(0); }
}
.dxt-minimap-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--dxt-rule);
  background: var(--dxt-bg-card);
  color: var(--dxt-ink-3);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: background 220ms ease, color 220ms ease, border-color 220ms ease, transform 200ms ease;
}
.dxt-minimap-dot:hover,
.dxt-minimap-dot:focus-visible {
  border-color: var(--dxt-ink);
  color: var(--dxt-ink);
  transform: scale(1.06);
  outline: none;
}
.dxt-minimap-dot-active {
  background: var(--dxt-mk, var(--dxt-ink));
  border-color: var(--dxt-mk, var(--dxt-ink));
  color: var(--dxt-paper-inv);
}
.dxt-minimap-dot.dxt-color-ok.dxt-minimap-dot-active     { --dxt-mk: var(--dxt-ok); }
.dxt-minimap-dot.dxt-color-warn.dxt-minimap-dot-active   { --dxt-mk: var(--dxt-warn); }
.dxt-minimap-dot.dxt-color-danger.dxt-minimap-dot-active { --dxt-mk: var(--dxt-danger); }
.dxt-minimap-dot.dxt-color-grey.dxt-minimap-dot-active   { --dxt-mk: var(--dxt-grey); }

/* Toolbar v3 : on garde le style v2 mais on cible aussi `.dxt-tool-btn`. */
.dxt-tool-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  padding: 6px 12px;
  background: var(--dxt-bg-2);
  border: 1px solid var(--dxt-rule);
  border-radius: 3px;
  color: var(--dxt-ink-2);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}
.dxt-tool-btn:hover,
.dxt-tool-btn:focus-visible {
  background: var(--dxt-ink);
  color: var(--dxt-paper-inv);
  border-color: var(--dxt-ink);
  outline: none;
}

/* ==========================================================================
   Reduced motion : on désactive toutes les animations v3
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .dxt-anim,
  .dxt-content,
  .dxt-back-btn,
  .dxt-minimap,
  .dxt-branch-card,
  .dxt-minimap-dot {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==========================================================================
   Mode nuit
   ========================================================================== */
body.dark-mode .dxt-tree {
  --dxt-bg-dark: #2a2d34;
  --dxt-paper-inv: #f0e8d8;
}
body.dark-mode .dxt-svg-wrap {
  background: var(--paper-2, #16181c);
  border-color: #3a3d44;
}
body.dark-mode .dxt-edge-label {
  fill: #ead8b5 !important;
  filter: url(#dxt-halo-dark);
}
/* === FIX #4 : popup mode nuit — spécificité renforcée pour battre le
   durcissement v5 du popup clair (`html body .dxt-popup-overlay .dxt-popup`,
   spécificité 0,2,2). Toutes les règles dark sont préfixées par `html` pour
   atteindre 0,3,2 et l'emporter. Aucune modification du JS, aucun ajout de
   classe — on cible exactement les classes réelles injectées par le moteur :
   .dxt-popup-overlay, .dxt-popup, .dxt-popup-title, .dxt-popup-sub,
   .dxt-popup-close, .dxt-popup-section, .dxt-popup-empty. */
html body.dark-mode .dxt-popup-overlay {
  background: rgba(0, 0, 0, 0.72) !important;
  background-color: rgba(0, 0, 0, 0.72) !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup {
  background: #2a2622 !important;
  background-color: #2a2622 !important;
  background-image: none !important;
  color: #f0e8d8 !important;
  border-color: #58504a !important;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65),
              0 4px 12px rgba(0, 0, 0, 0.35) !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-title {
  color: var(--dxt-popup-mk, #f0e8d8) !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-sub {
  color: #c4b898 !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-close {
  color: #c4b898 !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-close:hover,
html body.dark-mode .dxt-popup-overlay .dxt-popup-close:focus-visible {
  color: #f0e8d8 !important;
  background: #3a3530 !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-section h4 {
  color: #b2a98f !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-section p,
html body.dark-mode .dxt-popup-overlay .dxt-popup-section ul,
html body.dark-mode .dxt-popup-overlay .dxt-popup-section li {
  color: #d4c4a8 !important;
}
html body.dark-mode .dxt-popup-overlay .dxt-popup-empty {
  color: #b2a98f !important;
}
body.dark-mode .dxt-branch-card {
  background: #1f2228;
}
body.dark-mode .dxt-branch-card:hover,
body.dark-mode .dxt-branch-card:focus-visible {
  background: #262931;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
body.dark-mode .dxt-overview-root .dxt-node-root {
  background: #2a2d34;
  border-color: #2a2d34;
}

/* =============================================================
   MODE LUDIQUE — Phase 2C-PRÉ
   -------------------------------------------------------------
   Quand body.ludique-blocs-on est actif, on floute les contenus
   pédagogiques des nœuds (sous-titres, contenus de popup), tout
   en gardant le squelette de l'arbre + les titres principaux
   visibles. Hover reveal sur le nœud / la cellule.
   Les images, SVG d'arête, et les boutons interactifs ne sont
   jamais floutés.
   ============================================================= */

/* Vue overview : sous-titres des branches/cards/root */
body.ludique-blocs-on .dxt-overview .dxt-sub,
body.ludique-blocs-on .dxt-overview .dxt-branch-card-pivot,
body.ludique-blocs-on .dxt-overview .dxt-branch-card-counts {
  filter: blur(5px);
  cursor: help;
  transition: filter 0.18s ease;
}
body.ludique-blocs-on .dxt-overview-root:hover .dxt-sub,
body.ludique-blocs-on .dxt-branch-card:hover .dxt-sub,
body.ludique-blocs-on .dxt-branch-card:hover .dxt-branch-card-pivot,
body.ludique-blocs-on .dxt-branch-card:hover .dxt-branch-card-counts {
  filter: blur(0);
}

/* Vue arbre déployé (SVG + foreignObject) : sous-titres des nœuds */
body.ludique-blocs-on .dxt-svg .dxt-node .dxt-sub {
  filter: blur(5px);
  cursor: help;
  transition: filter 0.18s ease;
}
body.ludique-blocs-on .dxt-svg .dxt-node:hover .dxt-sub {
  filter: blur(0);
}

/* Popup détail : sous-titre + contenu de chaque section */
body.ludique-blocs-on .dxt-popup .dxt-popup-sub,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > p,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > ul > li,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > ol > li {
  filter: blur(5px);
  cursor: help;
  transition: filter 0.18s ease;
}
body.ludique-blocs-on .dxt-popup .dxt-popup-sub:hover,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > p:hover,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > ul > li:hover,
body.ludique-blocs-on .dxt-popup .dxt-popup-section > ol > li:hover {
  filter: blur(0);
}

/* Le titre principal de chaque popup et de chaque section reste visible :
   .dxt-popup-title (h3), .dxt-popup-section h4, .dxt-title (header de
   nœud), .dxt-branch-card-title (label de famille), .dxt-branch-card-edge
   (label de pivot d'orientation). Aucune règle nécessaire — pas de
   sélecteur de blur sur ces éléments. */