/* ============================================================
   MDJLABS — ATELIER · scène « Examens blancs & liaisons pondérées » (PL5)
   Une SEULE scène (#pl-examens), épinglée, scrubée, réversible.
   L'ENTITÉ CONTINUE = la QUESTION : elle vit d'abord dans l'épreuve
   (état 1), migre en nœud central d'un graphe pondéré (état 2), puis
   son échec rétro-éclaire les atomes à revoir (état 3). Jamais des
   visuels qui se remplacent : la même question traverse les 3 états.
   Réutilise la coquille .plx-* (prolearn-scroll) + le chrome d'atelier
   (.atx-* de atelier-atome.css). CE fichier = viz examens + overlays.
   ============================================================ */

:root { --pex-alert: #FF7E7E; --pex-alert-soft: color-mix(in oklab, #FF7E7E 16%, transparent); }
html[data-theme="light"] { --pex-alert: #CE3A2A; --pex-alert-soft: color-mix(in oklab, #CE3A2A 12%, transparent); }

/* rail : marqueur réel « Examens » ------------------------------------ */
.plx-rail button.is-here .d { background: var(--acc); border-color: var(--acc); box-shadow: 0 0 12px var(--acc-glow); }
.plx-rail button.is-here { color: var(--acc); }
.plx-rail button.is-here .t { opacity: 1; transform: none; }

/* intro : l'accent EM prend la teal produit ---------------------------- */
.atx-intro h1 em { font-style: normal; color: var(--pl); text-shadow: 0 0 48px var(--pl-glow); }

/* ============================================================
   VIZ — conteneur iso 3D, entité continue (question → graphe)
   ============================================================ */
.pex-viz { position: relative; aspect-ratio: 900 / 560; max-height: 66vh; width: 100%; margin: 0 auto; perspective: 1500px; }
.pex-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible;
  transform: rotateX(8deg) rotateZ(0deg); transform-origin: 50% 46%; will-change: transform; }
.pex-svg.alive { animation: pexdrift 14s var(--ease) infinite alternate; }
@keyframes pexdrift { from { transform: rotateX(10deg) rotateZ(-1.2deg); } to { transform: rotateX(6deg) rotateZ(1.2deg); } }

/* -- classes SVG (tokens uniquement, theme-aware) -- */
.pex-qnode { fill: var(--bg-1); stroke: var(--acc); stroke-width: 2; filter: drop-shadow(0 0 16px var(--acc-glow)); }
.pex-qhalo { fill: var(--acc); opacity: .1; }
.pex-qtag { font-family: var(--ff-mono); fill: var(--acc); text-anchor: middle; letter-spacing: 0.12em; font-weight: 600; }
.pex-qt { font-family: var(--ff-mono); fill: var(--fg-0); text-anchor: middle; font-weight: 600; letter-spacing: 0.02em; }
.pex-qsub { font-family: var(--ff-mono); fill: var(--fg-3); text-anchor: middle; letter-spacing: 0.04em; }

.pex-badge { fill: var(--bg-2); stroke: var(--line-strong); stroke-width: 1.4; }
.pex-badge-t { font-family: var(--ff-mono); fill: var(--fg-2); text-anchor: middle; font-weight: 600; }
.pex-bwrap.alert .pex-badge { fill: var(--pex-alert-soft); stroke: var(--pex-alert); filter: drop-shadow(0 0 10px var(--pex-alert)); animation: pexalert 1.1s var(--ease) infinite; }
.pex-bwrap.alert .pex-badge-t { fill: var(--pex-alert); }
@keyframes pexalert { 0%,100% { opacity: 1; } 50% { opacity: .55; } }

.pex-edge { fill: none; stroke: var(--pl); opacity: .3; stroke-linecap: round; }
.pex-edge.hot { opacity: .9; filter: drop-shadow(0 0 5px var(--pl-glow)); }
.pex-flow { fill: none; stroke: var(--pl); stroke-linecap: round; stroke-dasharray: 5 11; filter: drop-shadow(0 0 6px var(--pl-glow)); animation: pexflow 1.05s linear infinite; }
@keyframes pexflow { to { stroke-dashoffset: -16; } }

.pex-atom-halo { fill: var(--pl); opacity: 0; }
.pex-atom { fill: var(--pl-soft); stroke: var(--pl-line); stroke-width: 1.6; transition: none; }
.pex-atom.on { stroke: var(--pl); filter: drop-shadow(0 0 12px var(--pl-glow)); }
.pex-glyph { font-family: var(--ff-mono); fill: var(--pl); text-anchor: middle; font-weight: 600; }
.pex-alabel { font-family: var(--ff-mono); fill: var(--fg-1); text-anchor: middle; letter-spacing: 0.02em; }
.pex-alabel.on { fill: var(--fg-0); }
.pex-arole { font-family: var(--ff-mono); fill: var(--fg-3); text-anchor: middle; letter-spacing: 0.1em; }
.pex-arole.on { fill: var(--pl); }
.pex-wlabel { font-family: var(--ff-mono); fill: var(--pl); text-anchor: middle; font-weight: 600; font-feature-settings: "tnum"; }
.pex-wbg { fill: var(--bg-0); stroke: var(--pl-line); stroke-width: 1; }

/* ============================================================
   OVERLAY HTML — l'épreuve (état 1), conditions du jour J
   ============================================================ */
.pex-exam { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); z-index: 4; width: min(92%, 520px);
  border: 1px solid var(--pl-line); border-radius: var(--r-md); background: var(--bg-1);
  box-shadow: 0 46px 110px -55px rgba(0,0,0,.9), 0 0 0 1px var(--pl-soft); overflow: hidden; will-change: opacity, transform; }
html[data-theme="light"] .pex-exam { box-shadow: 0 30px 76px -42px rgba(20,30,18,.34); }
.pex-ref { display: flex; align-items: center; gap: 9px; padding: 9px 13px; border-bottom: 1px solid var(--line); background: var(--bg-2); font-family: var(--ff-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; }
.pex-ref i { width: 6px; height: 6px; border-radius: 999px; background: var(--acc); box-shadow: 0 0 7px var(--acc-glow); flex: none; animation: mpulse 1.8s var(--ease) infinite; }
.pex-ref .rl { color: var(--fg-3); }
.pex-ref .rv { color: var(--pl); margin-left: auto; transition: opacity .35s var(--ease); }
.pex-meta { display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; align-items: center; padding: 11px 13px; border-bottom: 1px solid var(--line); }
.pex-timer { display: inline-flex; align-items: center; gap: 7px; font-family: var(--ff-mono); font-size: 15px; color: var(--acc); font-feature-settings: "tnum"; }
.pex-timer svg { width: 14px; height: 14px; }
.pex-timer.low { color: var(--pex-alert); }
.pex-prog { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.pex-prog b { font-family: var(--ff-mono); font-size: 9.5px; letter-spacing: 0.08em; color: var(--fg-1); font-weight: 500; }
.pex-prog .bar { height: 5px; border-radius: 3px; background: var(--bg-3); overflow: hidden; }
.pex-prog .bar b { display: block; height: 100%; width: 30%; background: var(--pl); box-shadow: 0 0 8px var(--pl-glow); border-radius: 3px; }
.pex-scale { grid-column: 1 / -1; font-family: var(--ff-mono); font-size: 8.5px; letter-spacing: 0.06em; color: var(--fg-3); }
.pex-scale b { color: var(--pl); font-weight: 500; }
.pex-q { padding: 12px 13px 4px; }
.pex-qtag2 { display: inline-block; font-family: var(--ff-mono); font-size: 8px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--acc); border: 1px solid var(--acc-line); border-radius: var(--r-xs); padding: 3px 7px; margin-bottom: 8px; transition: opacity .35s var(--ease); }
.pex-q p { margin: 0; font-size: 12.5px; line-height: 1.45; color: var(--fg-0); text-wrap: pretty; transition: opacity .35s var(--ease); }
.pex-opts { padding: 10px 13px 14px; display: flex; flex-direction: column; gap: 6px; }
.pex-opt { display: flex; align-items: center; gap: 9px; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--bg-2); font-size: 10.5px; color: var(--fg-1); transition: opacity .35s var(--ease); }
.pex-opt .mk { width: 15px; height: 15px; border-radius: 999px; border: 1px solid var(--line-strong); flex: none; display: inline-flex; align-items: center; justify-content: center; font-family: var(--ff-mono); font-size: 8px; color: var(--fg-3); }

/* ============================================================
   OVERLAY HTML — le diagnostic (état 3)
   ============================================================ */
.pex-diag { position: absolute; left: 50%; bottom: 2%; transform: translate(-50%, 16px); z-index: 5; width: min(92%, 470px);
  border: 1px solid var(--pl-line); border-radius: var(--r-md); background:
    radial-gradient(120% 120% at 0% 0%, var(--pl-soft), transparent 62%), var(--bg-1);
  box-shadow: 0 34px 90px -50px rgba(0,0,0,.85), 0 0 0 1px var(--pl-soft); padding: 13px 15px; opacity: 0; pointer-events: none; will-change: opacity, transform; }
.pex-diag .dh { display: flex; align-items: center; gap: 9px; margin-bottom: 11px; }
.pex-diag .dh .x { width: 18px; height: 18px; border-radius: 999px; background: var(--pex-alert-soft); border: 1px solid var(--pex-alert); color: var(--pex-alert); display: inline-flex; align-items: center; justify-content: center; font-family: var(--ff-mono); font-size: 10px; flex: none; }
.pex-diag .dh .tt { font-family: var(--ff-mono); font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--pl); }
.pex-diag .dh .tt b { color: var(--fg-0); font-weight: 600; }
.pex-drow { display: grid; grid-template-columns: 1fr auto; gap: 4px 10px; align-items: center; margin-bottom: 9px; }
.pex-drow:last-child { margin-bottom: 0; }
.pex-drow .nm { font-size: 11px; color: var(--fg-0); }
.pex-drow .rl { font-family: var(--ff-mono); font-size: 8px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.pex-drow .rl.strong { color: var(--pl); }
.pex-drow .bar { grid-column: 1 / -1; height: 7px; border-radius: 3px; background: var(--bg-3); overflow: hidden; }
.pex-drow .bar b { display: block; height: 100%; background: var(--pl); box-shadow: 0 0 8px var(--pl-glow); border-radius: 3px; }
.pex-drow.light .bar b { background: var(--pl-line); box-shadow: none; }
.pex-diag .foot { margin-top: 11px; font-family: var(--ff-mono); font-size: 8px; letter-spacing: 0.06em; color: var(--fg-3); text-wrap: balance; }
.pex-diag .foot b { color: var(--pl); font-weight: 500; }

/* ---- outro (repris de l'atelier atome, teal EM) ---- */
.atx-outro-links a.pri { color: var(--pl); border-color: var(--pl-line); background: var(--pl-soft); }
.atx-outro-links a.pri:hover { color: var(--pl); border-color: var(--pl); }

/* focus visibles */
.plx-step:focus-visible, .plx-rail button:focus-visible, .plx-link:focus-visible { outline: none; box-shadow: var(--glow-focus); border-radius: var(--r-sm); }

/* ============================================================
   RESPONSIVE — mobile : écran au-dessus, texte dessous, anim conservée
   ============================================================ */
@media (max-width: 960px) {
  .pex-viz { max-height: 40vh; }
  .plx-pin { padding: 64px 0 58px; }
  .plx-stage { gap: 16px; }
  .plx-side .plx-txts { min-height: clamp(120px, 22vh, 180px); }
  .plx-txt { font-size: clamp(17px, 4.6vw, 26px); }
  .plx-txt small { font-size: clamp(12px, 3.4vw, 14.5px); margin-top: 10px; }
  .plx-cap { display: none; }
  .pex-exam { width: 96%; }
  .pex-q p { font-size: 11.5px; }
}
@media (max-width: 960px) and (max-height: 720px) {
  .pex-viz { max-height: 34vh; }
  .plx-txt small { display: none; }
  .pex-opts .pex-opt:nth-child(n+3) { display: none; }
}

/* ============================================================
   REPLI — html.plx-flat / reduced-motion : 3 temps empilés lisibles
   ============================================================ */
html.plx-flat .pex-svg { animation: none !important; transform: none !important; position: static; width: 100%; height: clamp(300px, 74vw, 440px); }
html.plx-flat .pex-flow { animation: none !important; }
html.plx-flat .pex-viz { aspect-ratio: auto; max-height: none; height: auto; margin-bottom: 22px; display: flex; flex-direction: column; gap: 16px; }
html.plx-flat .pex-exam { position: static; transform: none !important; opacity: 1 !important; width: 100%; margin: 0; }
html.plx-flat .pex-diag { position: static; transform: none !important; opacity: 1 !important; width: 100%; }
html.plx-flat .plx-txt small { color: var(--fg-1); }
html.plx-flat .atx-intro { min-height: auto; }

@media (prefers-reduced-motion: reduce) {
  .pex-svg, .pex-flow, .pex-ref i, .pex-bwrap.alert .pex-badge, .atx-tag i, .atx-cue .dsc svg { animation: none !important; }
}