/* SimuLab — laboratoire virtuel de Physique-Chimie — theme colore */

:root {
  --fond: #f2f4fb;
  --surface: #ffffff;
  --surface2: #eef1f9;
  --bordure: #dde3f0;
  --texte: #1c2333;
  --texte2: #5a6478;
  --accent: #6d28d9;
  --accent2: #2563eb;
  --accent3: #0891b2;
  --accent-fonce: #5b21b6;
  --accent-clair: #ede9fe;
  --degrade: linear-gradient(100deg, #7c3aed 0%, #2563eb 55%, #06b6d4 100%);
  --degrade-doux: linear-gradient(100deg, rgba(124, 58, 237, .12), rgba(37, 99, 235, .10), rgba(6, 182, 212, .12));
  --physique: #2563eb;
  --chimie: #0d9488;
  --ok: #16a34a;
  --alerte: #d97706;
  --erreur: #dc2626;
  --ombre: 0 2px 10px rgba(49, 46, 129, .10), 0 1px 3px rgba(49, 46, 129, .08);
  --rayon: 14px;
  --canvas-fond: #0f172a;

  /* Couleurs des domaines */
  --dom-mecanique: #ea580c;
  --dom-electricite: #ca8a04;
  --dom-optique: #7c3aed;
  --dom-ondes: #0891b2;
  --dom-thermodynamique: #dc2626;
  --dom-nucleaire: #16a34a;
  --dom-solutions: #0d9488;
  --dom-acides-bases: #db2777;
  --dom-transformations: #9333ea;
  --dom-cinetique: #2563eb;

  /* Difficulte */
  --diff-1: #16a34a;
  --diff-2: #d97706;
  --diff-3: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fond: #0b1120;
    --surface: #151c30;
    --surface2: #1d2540;
    --bordure: #2c3657;
    --texte: #e6eaf2;
    --texte2: #9aa6bd;
    --accent: #a78bfa;
    --accent2: #60a5fa;
    --accent3: #22d3ee;
    --accent-fonce: #8b5cf6;
    --accent-clair: #312e81;
    --degrade: linear-gradient(100deg, #6d28d9 0%, #1d4ed8 55%, #0e7490 100%);
    --degrade-doux: linear-gradient(100deg, rgba(124, 58, 237, .18), rgba(37, 99, 235, .14), rgba(6, 182, 212, .16));
    --ok: #4ade80;
    --alerte: #fbbf24;
    --erreur: #f87171;
    --ombre: 0 2px 10px rgba(0, 0, 0, .45);
  }
}
:root[data-theme="dark"] {
  --fond: #0b1120;
  --surface: #151c30;
  --surface2: #1d2540;
  --bordure: #2c3657;
  --texte: #e6eaf2;
  --texte2: #9aa6bd;
  --accent: #a78bfa;
  --accent2: #60a5fa;
  --accent3: #22d3ee;
  --accent-fonce: #8b5cf6;
  --accent-clair: #312e81;
  --degrade: linear-gradient(100deg, #6d28d9 0%, #1d4ed8 55%, #0e7490 100%);
  --degrade-doux: linear-gradient(100deg, rgba(124, 58, 237, .18), rgba(37, 99, 235, .14), rgba(6, 182, 212, .16));
  --ok: #4ade80;
  --alerte: #fbbf24;
  --erreur: #f87171;
  --ombre: 0 2px 10px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }

/* Empeche les canvas (largeur intrinseque 840 px) d'elargir la page sur mobile */
canvas { max-width: 100%; height: auto; }
.exp-grille > *, .grille-cartes > * { min-width: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--fond);
  color: var(--texte);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; }
p { margin: .4em 0; }
a { color: var(--accent2); }

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--bordure);
  background: var(--surface);
  color: var(--texte);
  border-radius: 10px;
  padding: 8px 15px;
  transition: transform .08s, box-shadow .12s;
}
button:hover { background: var(--surface2); }
button:active { transform: scale(.97); }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2.5px solid var(--accent2);
  outline-offset: 2px;
}
button.primaire {
  background: var(--degrade);
  border: none;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .35);
}
button.primaire:hover { filter: brightness(1.1); background: var(--degrade); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none; }

input[type="number"], input[type="search"], input[type="text"], input[type="password"], select {
  font: inherit;
  color: var(--texte);
  background: var(--surface);
  border: 1.5px solid var(--bordure);
  border-radius: 10px;
  padding: 7px 11px;
  max-width: 100%;
}

/* ---------- En-tete ---------- */

.entete {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 20px;
  background: var(--degrade);
  color: #fff;
  box-shadow: 0 2px 12px rgba(49, 46, 129, .35);
}
.entete .logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 19px;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: .01em;
}
.entete .logo .fiole { font-size: 23px; filter: drop-shadow(0 1px 2px rgba(0,0,0,.3)); }
.entete .slogan { color: rgba(255, 255, 255, .85); font-size: 13px; }
.entete .espace { flex: 1; }
.entete label { font-size: 13px; color: rgba(255, 255, 255, .9); display: flex; align-items: center; gap: 7px; }
.entete select {
  background: rgba(255, 255, 255, .16);
  color: #fff;
  border-color: rgba(255, 255, 255, .35);
}
.entete select option { color: #1c2333; background: #fff; }
.entete .reglages-lien {
  font-size: 20px;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 9px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3);
}
.entete .reglages-lien:hover { background: rgba(255, 255, 255, .28); }

main { max-width: 1280px; margin: 0 auto; padding: 18px 16px 60px; }

/* ---------- Accueil ---------- */

.accueil-hero {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 32px 14px 22px;
  background: var(--degrade-doux);
  border-radius: var(--rayon);
  margin-bottom: 16px;
}
.accueil-hero::before, .accueil-hero::after {
  content: "";
  position: absolute;
  width: 260px; height: 260px;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .35;
  pointer-events: none;
}
.accueil-hero::before { background: #7c3aed; top: -120px; left: -60px; }
.accueil-hero::after { background: #06b6d4; bottom: -140px; right: -60px; }
.accueil-hero h1 {
  position: relative;
  font-size: 29px;
  font-weight: 800;
  background: var(--degrade);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.accueil-hero p { position: relative; color: var(--texte2); max-width: 660px; margin: 0 auto; }

/* Statistiques du laboratoire */
.stats-hero {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 16px;
}
.stat-chip {
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-radius: 12px;
  padding: 8px 18px;
  box-shadow: var(--ombre);
  min-width: 96px;
}
.stat-chip .nombre {
  font-size: 21px;
  font-weight: 800;
  background: var(--degrade);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-chip .libelle { font-size: 11.5px; color: var(--texte2); }

/* Navigation rapide par domaine */
.chips-domaines {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2px 0 14px;
}
.chips-domaines a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 13px;
  border-radius: 999px;
  color: var(--dom, var(--accent2));
  background: color-mix(in srgb, var(--dom, var(--accent2)) 11%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--dom, var(--accent2)) 35%, transparent);
  transition: transform .1s;
}
.chips-domaines a:hover { transform: translateY(-2px); background: color-mix(in srgb, var(--dom, var(--accent2)) 20%, transparent); }

.barre-filtres {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 16px 0;
  padding: 13px;
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  box-shadow: var(--ombre);
}
.barre-filtres input[type="search"] { flex: 1 1 220px; }
.barre-filtres select { flex: 0 1 auto; }

.domaine-titre {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 12px;
  font-size: 19px;
}
.domaine-titre .pastille {
  font-size: 19px;
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: color-mix(in srgb, var(--dom, var(--accent2)) 16%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--dom, var(--accent2)) 40%, transparent);
}
.domaine-titre .nom-domaine {
  color: var(--dom, var(--texte));
  font-weight: 800;
}

.grille-cartes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 14px;
}

.carte-exp {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 7px;
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-top: 4px solid var(--dom, var(--accent2));
  border-radius: var(--rayon);
  padding: 14px;
  text-decoration: none;
  color: var(--texte);
  box-shadow: var(--ombre);
  transition: transform .12s, box-shadow .12s;
}
.carte-exp:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--dom, var(--accent2)) 28%, transparent);
}
.carte-exp h3 { margin: 0; font-size: 16px; padding-right: 36px; }
.carte-exp .resume { color: var(--texte2); font-size: 13.5px; flex: 1; }
.carte-exp .icone-dom {
  position: absolute;
  top: 12px; right: 12px;
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--dom, var(--accent2)) 13%, transparent);
}
.carte-exp.avenir { opacity: .6; cursor: default; border-top-color: var(--bordure); }
.carte-exp.avenir:hover { transform: none; box-shadow: var(--ombre); }

.badges { display: flex; flex-wrap: wrap; gap: 5px; align-items: center; }
.badge {
  font-size: 11.5px;
  padding: 2.5px 10px;
  border-radius: 999px;
  background: var(--surface2);
  color: var(--texte2);
  white-space: nowrap;
}
.badge.matiere-physique { background: color-mix(in srgb, var(--physique) 15%, transparent); color: var(--physique); font-weight: 700; }
.badge.matiere-chimie { background: color-mix(in srgb, var(--chimie) 15%, transparent); color: var(--chimie); font-weight: 700; }
.badge.avenir { background: color-mix(in srgb, var(--alerte) 16%, transparent); color: var(--alerte); font-weight: 700; }
.badge.diff-1 { background: color-mix(in srgb, var(--diff-1) 15%, transparent); color: var(--diff-1); font-weight: 700; }
.badge.diff-2 { background: color-mix(in srgb, var(--diff-2) 16%, transparent); color: var(--diff-2); font-weight: 700; }
.badge.diff-3 { background: color-mix(in srgb, var(--diff-3) 15%, transparent); color: var(--diff-3); font-weight: 700; }
.badge.prog { background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); font-weight: 600; }

.vide { text-align: center; color: var(--texte2); padding: 40px 0; }

/* ---------- Page experience ---------- */

.exp-entete { margin: 2px 0 10px; }
.exp-entete .retour { font-size: 13px; text-decoration: none; font-weight: 600; }
.exp-entete h1 { font-size: 21px; margin: 3px 0 5px; font-weight: 800; }

.exp-grille {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(345px, 1fr);
  gap: 16px;
  align-items: start;
}

.panneau {
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  box-shadow: var(--ombre);
  overflow: hidden;
}
.panneau > h2 {
  font-size: 13.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #fff;
  margin: 0;
  padding: 10px 15px 9px;
  background: linear-gradient(95deg, var(--pan, var(--accent2)), color-mix(in srgb, var(--pan, var(--accent2)) 72%, #000 8%));
}
.panneau.pan-params { --pan: #2563eb; }
.panneau.pan-mesures { --pan: #0d9488; }
.panneau.pan-graphe { --pan: #7c3aed; }
.panneau.pan-formules { --pan: #d97706; }
.panneau.pan-resultats { --pan: #0ea5e9; }
.panneau.pan-interpretation { --pan: #16a34a; }
.panneau .contenu { padding: 13px 15px; }

.zone-sim { position: relative; }
/* Cadre "cockpit" : la hauteur du canvas est plafonnee pour que simulation,
   graphique et mesures restent visibles ensemble, meme en 1366x768 ;
   le letterbox lateral reste sombre et homogene. */
.zone-sim .cadre-canvas {
  background: var(--canvas-fond);
  border-radius: var(--rayon) var(--rayon) 0 0;
  display: flex;
  justify-content: center;
}
.zone-sim canvas {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: min(46vh, 430px);
  background: var(--canvas-fond);
}

.transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--bordure);
}
.transport .chrono {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  min-width: 86px;
  text-align: center;
  background: var(--accent-clair);
  color: var(--accent);
  border-radius: 9px;
  padding: 6px 8px;
}
.transport .vitesse { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--texte2); }
.transport input[type="range"] { width: 90px; accent-color: var(--accent); }

/* Barre d'acces rapide aux sections */
.nav-rapide {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px dashed var(--bordure);
}
.nav-rapide button {
  font-size: 13px;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1.5px solid color-mix(in srgb, var(--nv, var(--accent2)) 45%, transparent);
  color: var(--nv, var(--accent2));
  background: color-mix(in srgb, var(--nv, var(--accent2)) 9%, transparent);
  font-weight: 600;
}
.nav-rapide button:hover { background: color-mix(in srgb, var(--nv, var(--accent2)) 20%, transparent); }

/* Colonne droite : graphique, mesures et equations en taille complete
   (pas de defilement interne qui les tronque). */
.exp-cote {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Colonne principale : simulation (+ interpretation en direct) puis resultats */
.exp-principale { display: flex; flex-direction: column; gap: 14px; min-width: 0; }

/* Barre de parametres horizontale (panneau independant) */
.params-horizontal .contenu {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 6px 20px;
  align-items: start;
}
.params-horizontal .param { margin-bottom: 0; }
.params-horizontal .contenu > button { align-self: end; justify-self: start; margin-bottom: 2px; }

/* Parametres integres au panneau de simulation, avec le bouton Demarrer */
.params-integres {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 6px 20px;
  align-items: start;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--bordure);
  background: color-mix(in srgb, var(--accent2) 4%, var(--surface));
}
.params-integres .param { margin-bottom: 0; }
.params-integres > button { align-self: end; justify-self: start; margin-bottom: 2px; }

/* Interpretation en direct, integree au panneau de simulation */
.interp-direct {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 7px 14px;
  background: color-mix(in srgb, #16a34a 8%, var(--surface));
  border-top: 3px solid #16a34a;
  max-height: 92px;
  overflow-y: auto;
  font-size: 13px;
}
.interp-direct .interp-titre {
  flex: 0 0 auto;
  font-weight: 800;
  color: #16a34a;
  font-size: 13px;
  white-space: nowrap;
  padding-top: 1px;
}
.interp-direct .interp-contenu { flex: 1; min-width: 0; }
.interp-direct .interp-contenu p { margin: .25em 0; }

/* Parametres */
.param { margin-bottom: 13px; }
.param:last-child { margin-bottom: 2px; }
.param .ligne1 {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
}
.param .valeur { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--accent2); }
.param .plage { font-size: 11.5px; color: var(--texte2); }
.param input[type="range"] { width: 100%; margin: 4px 0 0; accent-color: var(--accent2); }
.param .nombre-ligne { display: flex; gap: 8px; align-items: center; margin-top: 2px; }
.param input[type="number"] { width: 110px; padding: 4px 8px; font-size: 13.5px; }
.param select { width: 100%; margin-top: 3px; }
.param .case { display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.param .case input[type="checkbox"] { accent-color: var(--accent2); width: 17px; height: 17px; }
.param .indic-reinit { font-size: 11px; color: var(--texte2); }

/* Mesures / instruments */
.mesures { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.instrument {
  background: linear-gradient(145deg, var(--surface2), color-mix(in srgb, var(--surface2) 80%, #0d9488 6%));
  border-left: 3px solid #0d9488;
  border-radius: 9px;
  padding: 5px 9px;
  transition: transform .1s, box-shadow .1s;
}
.instrument:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 10px color-mix(in srgb, #0d9488 22%, transparent);
}
.instrument .nom { font-size: 10.5px; color: var(--texte2); text-transform: uppercase; letter-spacing: .02em; }
.instrument .val {
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-family: Consolas, "Cascadia Mono", monospace;
  color: var(--texte);
}
.instrument .incert { font-size: 10px; color: var(--texte2); }

/* Graphique */
.graphe-canvas { width: 100%; height: auto; display: block; }
.graphe-onglets { display: flex; gap: 4px; padding: 8px 10px 0; flex-wrap: wrap; }
.graphe-onglets button { font-size: 12.5px; padding: 4px 12px; border-radius: 999px; }
.graphe-onglets button[aria-pressed="true"] { background: #7c3aed; color: #fff; border-color: #7c3aed; }

/* Formules */
.formules { display: flex; flex-direction: column; gap: 7px; }
.formule {
  font-family: Cambria, Georgia, serif;
  font-size: 15.5px;
  background: color-mix(in srgb, #d97706 8%, var(--surface2));
  border-left: 3px solid #d97706;
  border-radius: 9px;
  padding: 7px 11px;
}
.formule .detail { font-family: "Segoe UI", system-ui, sans-serif; font-size: 12px; color: var(--texte2); }

/* Sections pedagogiques */
.exp-sections { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
details.section-pedago {
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-left: 5px solid var(--sec, var(--accent2));
  border-radius: var(--rayon);
  box-shadow: var(--ombre);
}
details.section-pedago.sec-objectif { --sec: #ea580c; }
details.section-pedago.sec-principe { --sec: #0891b2; }
details.section-pedago.sec-materiel { --sec: #64748b; }
details.section-pedago.sec-resultats { --sec: #2563eb; }
details.section-pedago.sec-interpretation { --sec: #0d9488; }
details.section-pedago.sec-conclusion { --sec: #16a34a; }
details.section-pedago.sec-ia { --sec: #7c3aed; }
details.section-pedago.sec-quiz { --sec: #db2777; }
details.section-pedago > summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 15.5px;
  padding: 13px 17px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--sec, var(--texte));
}
details.section-pedago > summary::-webkit-details-marker { display: none; }
details.section-pedago > summary::after { content: "\25BE"; margin-left: auto; color: var(--texte2); transition: transform .15s; }
details.section-pedago[open] > summary::after { transform: rotate(180deg); }
details.section-pedago .corps { padding: 2px 17px 16px; color: var(--texte); }
details.section-pedago ul, details.section-pedago ol { margin: .4em 0; padding-left: 1.4em; }

table.tbl {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  margin: 8px 0;
}
.tbl th, .tbl td { border: 1px solid var(--bordure); padding: 6px 10px; text-align: left; }
.tbl th { background: color-mix(in srgb, var(--accent2) 9%, var(--surface2)); font-weight: 700; }
.tbl td.num { font-variant-numeric: tabular-nums; text-align: right; }

.note-info {
  background: color-mix(in srgb, var(--accent2) 11%, transparent);
  border-left: 3px solid var(--accent2);
  color: var(--texte);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 13.5px;
  margin: 8px 0;
}
.note-alerte {
  background: color-mix(in srgb, var(--alerte) 14%, transparent);
  border-left: 3px solid var(--alerte);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 13.5px;
  margin: 8px 0;
}

/* ---------- IA ---------- */

.ia-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 4px 0 10px; }
.ia-reponse { font-size: 14.5px; }
.ia-reponse h3 { font-size: 15.5px; margin: 14px 0 4px; color: #7c3aed; }
.ia-attente { display: flex; align-items: center; gap: 10px; color: var(--texte2); padding: 8px 0; }
.spinner {
  width: 17px; height: 17px;
  border: 2.5px solid var(--bordure);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: tourner .8s linear infinite;
}
@keyframes tourner { to { transform: rotate(360deg); } }

/* Quiz */
.quiz-q {
  border: 1px solid var(--bordure);
  border-left: 4px solid #db2777;
  border-radius: var(--rayon);
  padding: 13px 15px;
  margin: 10px 0;
  background: var(--surface);
}
.quiz-q .enonce { font-weight: 700; margin-bottom: 8px; }
.quiz-choix { display: flex; flex-direction: column; gap: 6px; }
.quiz-choix button { text-align: left; padding: 9px 13px; }
.quiz-choix button.bonne { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); font-weight: 700; }
.quiz-choix button.mauvaise { border-color: var(--erreur); background: color-mix(in srgb, var(--erreur) 13%, transparent); }
.quiz-num { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.quiz-expl {
  margin-top: 9px;
  padding: 9px 12px;
  border-radius: 9px;
  background: var(--surface2);
  font-size: 13.5px;
}
.quiz-score {
  text-align: center;
  padding: 18px;
  background: var(--degrade-doux);
  border: 2px solid transparent;
  border-image: var(--degrade) 1;
  border-radius: var(--rayon);
  margin: 12px 0;
}
.quiz-score .note {
  font-size: 34px;
  font-weight: 800;
  background: var(--degrade);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.quiz-diff { font-size: 11.5px; color: var(--texte2); }

/* ---------- Reglages ---------- */

.reglages-grille { display: grid; gap: 16px; max-width: 760px; margin: 0 auto; }
.reglages-grille .ligne-champ { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 9px 0; }
.reglages-grille .ligne-champ > label { min-width: 170px; font-weight: 600; font-size: 13.5px; }
.reglages-grille .ligne-champ input, .reglages-grille .ligne-champ select { flex: 1 1 220px; }
.etat-cle { font-size: 12.5px; padding: 3px 10px; border-radius: 999px; font-weight: 700; }
.etat-cle.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.etat-cle.absent { background: var(--surface2); color: var(--texte2); }

.aide-champ { margin: 2px 0 10px; font-size: 12.5px; color: var(--texte2); }
.note-limite { border-left-color: var(--alerte); }

/* ---------- Labo libre ---------- */

.labo-outils { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--bordure); }
.labo-outils button[aria-pressed="true"] { background: var(--degrade); color: #fff; border-color: transparent; }
.labo-aide { font-size: 13px; color: var(--texte2); padding: 8px 12px; }
button.danger { color: var(--erreur); border-color: color-mix(in srgb, var(--erreur) 45%, var(--bordure)); }
button.danger:hover { background: color-mix(in srgb, var(--erreur) 12%, transparent); }
.btn-modifier-montage {
  background: linear-gradient(100deg, #f59e0b, #ef4444); color: #fff; border-color: transparent; font-weight: 700;
}
.btn-modifier-montage:hover { filter: brightness(1.08); background: linear-gradient(100deg, #f59e0b, #ef4444); }
.bandeau-montage {
  margin: 8px 0 2px; padding: 8px 12px; border-radius: 10px; font-size: 14px;
  background: color-mix(in srgb, #f59e0b 14%, var(--surface)); border: 1px solid color-mix(in srgb, #f59e0b 45%, var(--bordure));
}

/* Atelier electricite : palette | plan | inspecteur */
.labo-elec {
  display: grid; grid-template-columns: 206px minmax(0, 1fr) 360px; gap: 12px; padding: 12px; align-items: start;
}
.labo-elec > * { min-width: 0; }
.labo-palette h2, .labo-inspecteur h2 { font-size: 15px; margin: 0 0 6px; }
.labo-palette-aide { margin: 0 0 8px; font-size: 12.5px; color: var(--texte2); }
.labo-palette-grille { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.tuile-comp {
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 5px 3px 6px;
  border-radius: 10px; cursor: grab; touch-action: none; user-select: none; font-size: 11.5px; line-height: 1.15;
  background: var(--surface2);
}
.tuile-comp canvas { width: 100%; max-width: 92px; height: auto; aspect-ratio: 120 / 48; border-radius: 6px; pointer-events: none; }
.tuile-comp:hover { border-color: var(--accent2); box-shadow: 0 3px 10px rgba(37, 99, 235, .18); transform: translateY(-1px); }
.tuile-comp:active { cursor: grabbing; }
.labo-plan { min-width: 0; }
.labo-barre { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 0 0 10px; }
.zone-sim > .labo-barre { padding: 10px 12px; }
.labo-horloge { margin-left: auto; font-family: Consolas, monospace; font-size: 13px; color: var(--texte2); }
.labo-cadre-plan { background: var(--canvas-fond); border-radius: 12px; overflow: hidden; }
.labo-cadre-plan canvas { display: block; width: 100%; touch-action: none; cursor: default; outline: none; }
.labo-cadre-plan canvas:focus-visible { box-shadow: inset 0 0 0 3px var(--accent2); }
.labo-corbeille {
  margin-top: 8px; padding: 10px; border: 2px dashed var(--bordure); border-radius: 12px; text-align: center;
  color: var(--texte2); font-weight: 600; opacity: .35; transition: all .15s;
}
.labo-corbeille.visible { opacity: 1; border-color: var(--erreur); color: var(--erreur); }
.labo-corbeille.active { background: color-mix(in srgb, var(--erreur) 16%, transparent); transform: scale(1.02); }
.labo-inspecteur { min-width: 0; }
.labo-inspecteur-vide, .labo-inspecteur-aide { font-size: 13px; color: var(--texte2); margin: 0 0 8px; }
.labo-raccourcis { margin: 0; padding-left: 18px; font-size: 12.5px; color: var(--texte2); line-height: 1.6; }
.labo-raccourcis kbd {
  font-family: Consolas, monospace; font-size: 11.5px; padding: 0 5px; border-radius: 4px;
  border: 1px solid var(--bordure); background: var(--surface2);
}
.labo-actions { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.labo-lectures { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 6px 0 10px; }
.labo-lectures .instrument { padding: 6px 8px; }
.labo-lectures .instrument .valeur { font-size: 15px; }
.labo-scope-titre { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700; margin: 8px 0 6px; }
.labo-scope-titre .voies { font-size: 11.5px; font-weight: 600; }
.btn-agrandir { margin-left: auto; padding: 4px 10px; font-size: 12.5px; font-weight: 700; }
.labo-scope {
  display: block; width: 100%; border-radius: 10px; background: #05120e; cursor: zoom-in;
  border: 3px solid #1f2937; box-shadow: inset 0 0 18px rgba(74, 222, 128, .12);
}
.oscillo-mesures { display: grid; grid-template-columns: repeat(auto-fill, minmax(98px, 1fr)); gap: 5px; margin-top: 6px; }
.oscillo-mesures.grand { grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 8px; margin-top: 10px; }
.oscillo-mesure {
  display: flex; flex-direction: column; gap: 1px; padding: 5px 7px; border-radius: 8px;
  background: var(--surface2); border-left: 3px solid var(--c);
}
.oscillo-mesure span { font-size: 10.5px; color: var(--texte2); text-transform: uppercase; letter-spacing: .02em; }
.oscillo-mesure strong { font-family: Consolas, monospace; font-size: 13px; }
.oscillo-mesures.grand .oscillo-mesure strong { font-size: 16px; }
.oscillo-vide { grid-column: 1 / -1; font-size: 12.5px; color: var(--texte2); }

/* Oscilloscope agrandi */
.modale-fond {
  position: fixed; inset: 0; z-index: 900; display: flex; align-items: center; justify-content: center;
  padding: 16px; background: rgba(2, 6, 23, .72); backdrop-filter: blur(3px);
}
.modale-oscillo {
  width: min(1180px, 100%); max-height: calc(100vh - 32px); overflow: auto; padding: 14px 16px 12px;
  border-radius: 16px; background: var(--surface); box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
}
.modale-tete { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 10px; }
.modale-tete h2 { margin: 0; font-size: 18px; }
.modale-tete h2 small { font-weight: 500; color: var(--texte2); margin-left: 6px; font-size: 13px; }
.modale-outils { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-left: auto; }
.modale-fermer { font-size: 17px; font-weight: 700; width: 38px; padding: 6px 0; }
.voie-osc { display: inline-flex; align-items: center; gap: 5px; font-weight: 700; font-size: 13px; color: var(--c); }
.voie-osc input { accent-color: var(--c); }
.oscillo-grand {
  display: block; width: 100%; border-radius: 12px; background: #05120e;
  border: 4px solid #1f2937; box-shadow: inset 0 0 30px rgba(74, 222, 128, .14);
}
.oscillo-aide { margin: 8px 0 0; font-size: 12.5px; color: var(--texte2); }
.fantome-comp {
  position: fixed; z-index: 1000; pointer-events: none; transform: translate(-50%, -50%) scale(1.05);
  padding: 4px 8px; border-radius: 10px; background: var(--surface); box-shadow: 0 8px 24px rgba(0, 0, 0, .3);
  border: 2px solid var(--accent2); font-weight: 600; font-size: 13px; white-space: nowrap; opacity: .92;
}
.fantome-comp canvas { display: block; width: 100px; height: 40px; border-radius: 6px; }
.fantome-comp.sur-plan { opacity: .35; border-color: var(--ok); }
.fantome-comp.a-supprimer { border-color: var(--erreur); opacity: .9; }
.tuile-ligne { touch-action: none; cursor: grab; user-select: none; }
.labo-flacons .flacon { display: inline-flex; flex-direction: column; align-items: center; gap: 1px; min-width: 112px; font-size: 12.5px; }
.labo-flacons .flacon small { color: var(--texte2); font-size: 11px; }

@media (max-width: 1180px) {
  .labo-elec { grid-template-columns: 180px minmax(0, 1fr); }
  .labo-inspecteur { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0 16px; }
  .labo-inspecteur > h2, .labo-inspecteur > p, .labo-inspecteur > ul { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .labo-elec { grid-template-columns: 1fr; }
  /* grille repliee (pas de bande defilante : un glisser sur une tuile doit la saisir) */
  .labo-palette-grille { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); }
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .exp-grille { grid-template-columns: 1fr; }
  .entete .slogan { display: none; }
  /* en colonne unique, la zone laterale ne doit pas rester collante */
  .exp-cote { position: static; max-height: none; overflow: visible; }
  .zone-sim canvas { max-height: none; width: 100%; }
}
@media (max-width: 620px) {
  main { padding: 12px 10px 50px; }
  .entete { padding: 8px 10px; gap: 8px; }
  .mesures { grid-template-columns: 1fr 1fr; }
  .transport { gap: 6px; }
  .transport button { padding: 7px 10px; }
  .accueil-hero h1 { font-size: 21px; }
}

/* ---------- Accessibilite / mouvement reduit ---------- */

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation-duration: .01s !important; }
  .spinner { animation: tourner 1.5s linear infinite !important; }
  .carte-exp:hover { transform: none; }
}

/* Barre de defilement discrete et assortie */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--texte2) 38%, transparent);
  border-radius: 8px;
  border: 3px solid var(--fond);
}
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--texte2) 60%, transparent); }

.visuellement-cache {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}