/* Lecture intérieure en polyphonie — identité omnia amplecti (fond noir + or + serif) */
:root {
  --bg: #14110f;
  --bg2: #1b1714;
  --carte: #211c18;
  --carte2: #2a241f;
  --bordure: #392f27;
  --encre: #f4ede1;
  --texte: #e7ddcd;
  --muet: #a99c8b;
  --or: #c8a24e;
  --or-clair: #e7c878;
  --ok: #3f7a45;
  --rayon: 12px;
  --serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans: "Montserrat", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
.pied { order: 1; }  /* pied de page toujours en dernier (body en flex) */
body {
  margin: 0;
  font-family: var(--sans);
  background: radial-gradient(1200px 700px at 50% -15%, #2a221b, var(--bg)) fixed;
  color: var(--texte);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* En-tête */
.entete { width: 100%; max-width: 820px; padding: 1.3rem 0.9rem 0.2rem; text-align: left; }
.marque {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--serif); font-style: normal; font-weight: 600;
  font-size: 1.25rem; color: var(--encre); text-decoration: none;
  padding: 0.15rem 0; transition: color 0.15s;
}
.marque:hover { color: var(--or-clair); }
.marque .embleme { color: var(--or-clair); font-style: normal; font-size: 1.5rem; line-height: 1; }
.entete h1 {
  margin: 0.7rem 0 0.1rem;
  font-family: var(--serif); font-weight: 700;
  font-size: 2.9rem; line-height: 1.04; letter-spacing: 0.01em;
  color: var(--encre);
}
.accroche {
  margin: 0.1rem 0 0.7rem; color: var(--muet);
  font-family: var(--serif); font-style: italic; font-size: 1.15rem; max-width: 46ch;
}
.lien-aide {
  background: var(--carte); border: 1px solid var(--bordure); color: var(--texte);
  padding: 0.3rem 0.8rem; border-radius: 999px; cursor: pointer; font-size: 0.82rem;
}
.lien-aide:hover { color: var(--encre); border-color: var(--or); }
.filet {
  height: 2px; margin: 0.9rem 0 0.2rem;
  background: linear-gradient(90deg, transparent, var(--or) 18%, var(--or-clair) 50%, var(--or) 82%, transparent);
  opacity: 0.8;
}

main { width: 100%; max-width: 820px; padding: 0.6rem 0.9rem 2rem; }

/* Introduction / méthode */
.intro { margin: 1rem 0 1.4rem; color: var(--texte); }
.intro p { margin: 0.5rem 0; line-height: 1.55; }
.intro strong { color: var(--or-clair); }

/* Barre d'outils globale */
.outils {
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.4rem;
  background: var(--carte); border: 1px solid var(--bordure); border-radius: var(--rayon);
  padding: 0.8rem 1rem; margin-bottom: 1.4rem;
}
.outils label { font-size: 0.85rem; color: var(--muet); display: flex; align-items: center; gap: 0.5rem; }
.outils input[type="range"] { accent-color: var(--or); width: 120px; }
.outils .val { color: var(--or-clair); font-weight: 700; min-width: 2.6ch; }
.outils .sep { flex: 1; }

/* Étapes (accordéon) */
.etape { border: 1px solid var(--bordure); border-radius: var(--rayon); margin-bottom: 0.8rem; overflow: hidden; background: var(--bg2); }
.etape-entete {
  width: 100%; display: flex; align-items: center; gap: 0.9rem; text-align: left;
  background: var(--carte); border: none; color: var(--encre); cursor: pointer;
  padding: 0.9rem 1rem; font-family: inherit;
}
.etape-entete:hover { background: var(--carte2); }
.etape-num {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--serif); font-weight: 700; font-size: 1.05rem;
  color: var(--or-clair); border: 1px solid var(--or);
}
.etape-titre-zone { flex: 1; display: flex; align-items: baseline; flex-wrap: wrap; gap: 0.4rem 0.7rem; }
.etape-titre { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--encre); }
.etape-badge {
  font-size: 0.72rem; color: var(--muet); border: 1px solid var(--bordure);
  border-radius: 999px; padding: 0.05rem 0.55rem;
}
.etape-badge.complet { color: #dff0d9; background: var(--ok); border-color: var(--ok); }
.etape-chevron {
  font-size: 1.6rem; color: var(--muet); transition: transform 0.2s; line-height: 1;
}
.etape-entete[aria-expanded="true"] .etape-chevron { transform: rotate(90deg); color: var(--or-clair); }

.etape-contenu { padding: 0.4rem 1rem 1.2rem; }
.objectif { color: var(--muet); font-style: italic; line-height: 1.55; margin: 0.7rem 0 1.1rem; }

/* Carte d'exercice */
.exo {
  background: var(--carte); border: 1px solid var(--bordure); border-radius: var(--rayon);
  padding: 1rem 1.1rem; margin: 0.9rem 0;
  border-left: 3px solid var(--bordure); transition: border-color 0.2s;
}
.exo.est-juste { border-left-color: var(--ok); }
.exo.est-revoir { border-left-color: var(--or); }
.exo h4 {
  margin: 0 0 0.4rem; font-family: var(--serif); font-weight: 700;
  font-size: 1.15rem; color: var(--or-clair);
  display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap;
}
.exo-statut { font-family: var(--sans); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muet); font-weight: 600; }
.exo.est-juste .exo-statut { color: #8fce8f; }
.consigne { margin: 0 0 0.8rem; color: var(--texte); line-height: 1.5; font-size: 0.95rem; }

/* Partition */
.partition {
  background: #fbf6ec; border-radius: 8px; padding: 0.6rem 0.4rem;
  overflow-x: auto; margin-bottom: 0.9rem;
}
.partition svg { display: block; max-width: 100%; height: auto; }
.partition .ln { stroke: #4a4335; stroke-width: 1; }
.partition .led { stroke: #4a4335; stroke-width: 1.2; }
.partition .sys { stroke: #2c281f; stroke-width: 2.4; }
.partition .barre { stroke: #4a4335; stroke-width: 1.5; }
.partition .clef { font-size: 42px; fill: #2c281f; font-family: "Bravura", "Noto Music", "Segoe UI Symbol", system-ui, serif; }
.partition .clef-fa { font-size: 34px; }
.partition .alter { font-size: 16px; font-weight: 700; }
.partition .nom-note { font-size: 10px; font-weight: 700; text-anchor: middle; font-family: var(--sans); }
.partition .nom-interv { font-size: 9px; fill: #6b6250; text-anchor: middle; font-style: italic; font-family: var(--sans); }

/* Navigation entre exercices (un seul affiché à la fois) */
.exo-nav {
  display: flex; align-items: center; flex-wrap: wrap; gap: 0.6rem;
  margin: 0.4rem 0 0.2rem; padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--bordure);
}
.exo-compteur {
  font-family: var(--serif); font-style: italic; color: var(--or-clair);
  font-size: 1.05rem; margin: 0 0.3rem;
}
.nav-b { font-size: 0.82rem; }
.nav-suiv {
  background: linear-gradient(180deg, var(--or-clair), var(--or));
  color: #2c2102; border: none; font-weight: 700;
}
.nav-suiv:hover { filter: brightness(1.06); color: #2c2102; }
.exo-hote .exo { margin-top: 0.9rem; }

/* Contrôles */
.controles { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 0.6rem; }
.btn {
  background: var(--carte2); border: 1px solid var(--bordure); color: var(--texte);
  padding: 0.4rem 0.75rem; border-radius: 999px; cursor: pointer;
  font-size: 0.82rem; font-family: var(--sans); transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--or); color: var(--encre); }
.btn.prim { background: linear-gradient(180deg, var(--or-clair), var(--or)); color: #2c2102; border: none; font-weight: 700; }
.btn.prim:hover { filter: brightness(1.06); }
.btn.actif { border-color: var(--or); color: var(--or-clair); background: var(--carte); }
.btn.boucle-on { border-color: var(--or-clair); color: var(--or-clair); box-shadow: 0 0 0 2px rgba(200,162,78,0.25); }
.btn.voix { border-left: 4px solid var(--c, var(--or)); }
.btn.voix:hover { border-color: var(--c, var(--or)); }

.astuce { color: var(--muet); font-size: 0.8rem; font-style: italic; margin: 0.3rem 0 0.7rem; line-height: 1.4; }

/* Auto-évaluation */
.autoeval { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; border-top: 1px dashed var(--bordure); padding-top: 0.7rem; }
.ae-txt { font-size: 0.82rem; color: var(--muet); }
.btn.ae.choisi { background: var(--ok); border-color: var(--ok); color: #f1fbef; }
.btn.ae.choisi:hover { filter: brightness(1.05); color: #f1fbef; }

/* Aide (dialog) */
dialog#aide {
  max-width: 540px; border: 1px solid var(--or); border-radius: var(--rayon);
  background: var(--carte); color: var(--texte); padding: 1.5rem;
}
dialog#aide::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog#aide h2 { font-family: var(--serif); margin-top: 0; color: var(--or-clair); }
dialog#aide h3 { font-family: var(--serif); color: var(--encre); margin: 1rem 0 0.3rem; font-size: 1.1rem; }
dialog#aide p, dialog#aide li { line-height: 1.5; }
dialog#aide ol, dialog#aide ul { padding-left: 1.2rem; }
dialog#aide li { margin: 0.3rem 0; }
.bouton {
  display: inline-block; background: linear-gradient(180deg, var(--or-clair), var(--or));
  color: #2c2102; border: none; padding: 0.6rem 1.3rem; border-radius: 999px;
  font-size: 0.9rem; font-weight: 700; cursor: pointer; margin-top: 0.8rem;
}
.bouton:hover { filter: brightness(1.06); }

.pied { color: var(--muet); font-size: 0.85rem; padding: 1rem 0 2rem; font-family: var(--serif); font-style: italic; text-align: center; }
.pied a { color: var(--muet); }
.pied a:hover { color: var(--or-clair); }

@media (max-width: 560px) {
  .entete h1 { font-size: 2.2rem; }
  .outils input[type="range"] { width: 90px; }
  .etape-titre { font-size: 1.05rem; }
}