/* ================================================================
   EXO SHELL — SKIN « GLASS / BENTO »
   Variante visuelle additive (chargée APRÈS exo-shell.css)
   Inspirée des pages de sommaire (cejm.html / adoc.html) et de la
   page de chapitre CEJM_ch01.bis.html : hero + barre d'infos +
   glassmorphism (flou, transparence) + cartes façon bento.
   N'altère ni le HTML, ni le JS, ni les variables de thème —
   uniquement un re-skin visuel + relocalisation du score/progression
   dans la barre d'infos (mêmes id, donc exo-shell.js fonctionne
   sans modification).
   ================================================================ */

/* ───────────────────────── 0. HERO DE CHAPITRE ──────────────────────── */
.chap-hero{
  position: relative;
  overflow: hidden;
  margin: 14px 18px 0;
  border-radius: 1.75rem;
  min-height: 230px;
  display: flex;
  align-items: stretch;
  box-shadow: 0 22px 54px -18px rgba(0,0,0,.3);
}
.chap-hero-bg{ position:absolute; inset:0; z-index:0; }
.chap-hero-bg img{ width:100%; height:100%; object-fit:cover; }
.chap-hero-overlay{
  position:absolute; inset:0;
  background: linear-gradient(100deg,
    color-mix(in srgb, var(--accent) 92%, transparent) 0%,
    color-mix(in srgb, var(--accent) 58%, transparent) 45%,
    color-mix(in srgb, var(--accent) 12%, transparent) 100%);
}
.chap-hero-content{
  position: relative; z-index: 1;
  padding: 34px 38px;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  color: #fff;
}
.chap-hero-main{ max-width: 620px; }
.chap-hero-badge{
  display: inline-block;
  padding: 5px 14px; margin-bottom: 14px;
  border-radius: 9999px;
  font-size: .68rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: .08em;
  background: rgba(255,255,255,.18);
  backdrop-filter: blur(8px);
  font-family: 'DM Sans', sans-serif;
}
.chap-hero-title{
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  line-height: 1.15; letter-spacing: -.01em;
  margin-bottom: 10px;
  text-shadow: 0 2px 18px rgba(0,0,0,.18);
}
.chap-hero-sub{
  font-family: 'DM Sans', sans-serif;
  font-size: .95rem; font-weight: 500;
  opacity: .92; max-width: 480px; line-height: 1.6;
}

/* ───────────────── 0a. ACTIONS DU HERO (thème + raccourcis) ─────────── */

/* Sélecteur de thème — pill à 4 icônes, identique à #theme-switcher
   des pages CEJM/ADOC (cejm.html / adoc.html), ancré en haut à droite du hero */
.chap-hero-theme{
  position: absolute; z-index: 2;
  top: 18px; right: 18px;
  display: flex; align-items: center; gap: 2px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.32);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 9999px; padding: 4px;
  box-shadow: 0 6px 18px -8px rgba(0,0,0,.25);
}
.chap-hero-theme .theme-btn{
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 9999px;
  border: none; background: transparent; padding: 0;
  font-size: 1rem; line-height: 1; cursor: pointer;
  opacity: .65; transition: all .2s ease;
}
.chap-hero-theme .theme-btn:hover{ opacity: 1; }
.chap-hero-theme .theme-btn.active{
  background: #fff; opacity: 1;
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
}

/* Badge principal — même effet "verre" que le bouton Tableau de bord,
   avec inversion au survol */
.chap-hero-main > .chap-hero-badge{
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.32);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 18px -8px rgba(0,0,0,.25);
  color: #fff;
  text-decoration: none;
  transition: all .18s ease;
}
.chap-hero-main > .chap-hero-badge:hover{
  background: #fff;
  color: var(--accent);
  text-decoration: none;
}

/* Barre d'outils en bas à droite du hero : Recommencer + Tableau de bord */
.chap-hero-toolbar{
  position: absolute; z-index: 2;
  bottom: 18px; right: 18px;
  display: flex; align-items: center; gap: 8px;
}
.chap-hero-dashboard{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  border-radius: 9999px;
  font-family: 'DM Sans', sans-serif;
  font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  color: #fff; text-decoration: none;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.32);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 18px -8px rgba(0,0,0,.25);
  cursor: pointer;
  transition: all .18s ease;
}
.chap-hero-dashboard:hover{
  background: #fff; color: var(--accent);
  text-decoration: none;
}

.chap-hero-actions{
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
}

/* Raccourcis Explorer / Ancrer / Agir — pastilles colorées, calquées sur
   les .bento-btn / .btn-explorer / .btn-ancrer / .btn-agir de cejm.html */
.hero-bento-actions{
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  background: #fff;
  border-radius: 9999px;
  padding: 5px;
  box-shadow: 0 6px 18px -8px rgba(0,0,0,.25);
}
.hero-bento-btn{
  display: inline-flex; align-items: center;
  padding: .22rem .7rem; border-radius: 9999px;
  font-family: 'DM Sans', sans-serif;
  font-size: .62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  text-decoration: none; white-space: nowrap;
  border: 1.5px solid transparent;
  transition: all .18s ease;
}
.hero-bento-btn.btn-explorer{
  background: color-mix(in srgb, var(--accent) 16%, #fff);
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.hero-bento-btn.btn-explorer:hover{ background: var(--accent); color: #fff; border-color: var(--accent); }
.hero-bento-btn.btn-ancrer{
  background: color-mix(in srgb, var(--accent2) 16%, #fff);
  color: var(--accent2);
  border-color: color-mix(in srgb, var(--accent2) 35%, transparent);
}
.hero-bento-btn.btn-ancrer:hover{ background: var(--accent2); color: #fff; border-color: var(--accent2); }
.hero-bento-btn.btn-agir{
  background: color-mix(in srgb, var(--accent3) 16%, #fff);
  color: var(--accent3);
  border-color: color-mix(in srgb, var(--accent3) 35%, transparent);
}
.hero-bento-btn.btn-agir:hover{ background: var(--accent3); color: #fff; border-color: var(--accent3); }
.hero-bento-btn.is-current{ background: var(--accent2); color: #fff; border-color: var(--accent2); }

/* ───────────────────────── 0b. BARRE D'INFOS DE CHAPITRE ────────────── */
.chap-infobar{
  display: flex; flex-wrap: wrap; align-items: center; gap: 26px;
  margin: 16px 18px 0; padding: 14px 24px;
  border-radius: 1.5rem;
  background: color-mix(in srgb, var(--card) 70%, transparent);
  border: 1px solid color-mix(in srgb, #fff 18%, var(--border));
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  box-shadow: 0 12px 30px -16px rgba(0,0,0,.14);
}
.chap-stat{ display: flex; align-items: center; gap: 12px; }
.chap-stat-ico{
  width: 40px; height: 40px; border-radius: 9999px;
  display: flex; align-items: center; justify-content: center;
  font-size: .95rem; flex-shrink: 0;
}
.chap-stat-lbl{
  font-family: 'IBM Plex Mono', monospace;
  font-size: .6rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--text2); opacity: .75;
}
.chap-stat-val{
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 700; font-size: 1rem; color: var(--text);
}

/* Score & progression relocalisés (mêmes #id qu'à l'origine) */
.chap-infobar .score-box{ display:flex; gap:14px; align-items:center; font-family:'IBM Plex Mono',monospace; font-size:.85rem; }
.chap-infobar .progress-wrapper{
  background: transparent; border: none; padding: 0;
  display: flex; align-items: center; gap: 10px;
  min-width: 150px;
}
.chap-infobar .progress-bar-outer{ width: 100px; height: 8px; background: var(--border); border-radius: 100px; overflow: hidden; }
.chap-infobar .progress-pct{ min-width: 38px; }

.chap-steps{ display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.chap-step{
  display: flex; align-items: center; gap: 6px;
  padding: 0 14px; height: 38px; border-radius: 9999px;
  background: color-mix(in srgb, var(--bg2) 70%, transparent);
  color: var(--text2); border: 1px solid transparent;
  font-family: 'DM Sans', sans-serif;
  font-size: .78rem; font-weight: 600; cursor: pointer;
  transition: all .2s ease;
}
.chap-step:hover{
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}
.chap-step.active{
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 45%, transparent);
}

@media (max-width:900px){
  .chap-hero{ margin: 10px 10px 0; min-height: 190px; }
  .chap-hero-content{ padding: 24px; gap: 14px; }
  .chap-hero-actions{ gap: 8px; }
  .chap-hero-theme{ top: 10px; right: 10px; padding: 3px; }
  .chap-hero-theme .theme-btn{ width: 28px; height: 28px; font-size: .9rem; }
  .chap-hero-toolbar{ bottom: 10px; right: 10px; gap: 6px; }
  .chap-hero-dashboard{ padding: 6px 12px; font-size: .65rem; }
  .chap-infobar{ margin: 12px 10px 0; gap: 16px; }
  .chap-steps{ margin-left: 0; width: 100%; justify-content: flex-start; }
}

/* ───────────────────────── 1. FOND « AURORA » ───────────────────────── */
html{ scroll-behavior: smooth; }
body{
  background:
    radial-gradient(ellipse 900px 620px at 6% -8%,  color-mix(in srgb, var(--accent)  20%, transparent), transparent 60%),
    radial-gradient(ellipse 820px 700px at 108% 12%, color-mix(in srgb, var(--accent2) 16%, transparent), transparent 60%),
    radial-gradient(ellipse 760px 680px at 45% 115%, color-mix(in srgb, var(--accent3) 16%, transparent), transparent 60%),
    var(--bg);
  background-attachment: fixed, fixed, fixed, fixed;
}

/* ───────────────────────── 2. TOPBAR (ANCIEN HEADER) EN VERRE ────────── */
header{
  margin: 14px 18px 0;
  top: 14px;
  border-radius: 9999px;
  background: color-mix(in srgb, var(--card) 55%, transparent);
  border: 1px solid color-mix(in srgb, #fff 22%, var(--border));
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  box-shadow: 0 12px 34px -14px rgba(0,0,0,.16);
}
.btn-restart{
  border-radius: 9999px;
  background: color-mix(in srgb, var(--bg2) 65%, transparent);
  backdrop-filter: blur(10px);
  color: var(--accent);
}
.btn-restart:hover{ background: var(--accent); color: #fff; }

/* ───────────────────────── 3. CARTES « BENTO » EN VERRE ─────────────── */
.cours-section, .quiz-area, .modal{
  position: relative;
  overflow: hidden;
  border-radius: 1.5rem;
  background: color-mix(in srgb, var(--card) 65%, transparent);
  border: 1px solid color-mix(in srgb, #fff 18%, var(--border));
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
}
.cours-header{
  background: color-mix(in srgb, var(--bg2) 60%, transparent);
  backdrop-filter: blur(10px);
}
.cours-btn, .cours-page-indicator{
  border-radius: 9999px;
  background: color-mix(in srgb, var(--card) 70%, transparent);
}

/* ───────────────────────── 4. GRILLE D'ACTIVITÉS (BENTO) ─────────────── */
.activity-card{
  position: relative;
  overflow: hidden;
  border-radius: 1.25rem;
  background: color-mix(in srgb, var(--card) 62%, transparent);
  border: 1px solid color-mix(in srgb, #fff 16%, var(--border));
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s ease, border-color .25s ease;
}
.activity-card::before{
  content:"";
  position:absolute; top:0; left:0; right:0; height:4px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  opacity:0; transform: scaleX(.6); transform-origin:center;
  transition: opacity .25s ease, transform .25s ease;
  border-radius: 1.25rem 1.25rem 0 0;
}
.activity-card:nth-child(2)::before{ background: linear-gradient(135deg, var(--accent2), var(--accent3)); }
.activity-card:nth-child(3)::before{ background: linear-gradient(135deg, var(--correct), var(--accent3)); }
.activity-card:nth-child(4)::before{ background: linear-gradient(135deg, var(--accent3), var(--accent)); }
.activity-card:nth-child(5)::before{ background: linear-gradient(135deg, var(--accent), var(--accent3)); }
.activity-card:nth-child(6)::before{ background: linear-gradient(135deg, var(--accent2), var(--accent)); }
.activity-card:hover{
  transform: translateY(-4px);
  box-shadow: 0 22px 48px -14px rgba(0,0,0,.2);
}
.activity-card:hover::before, .activity-card.active::before{ opacity:1; transform: scaleX(1); }
.activity-count{ border-radius: 9999px; backdrop-filter: blur(6px); }

/* ───────────────────────── 5. BOUTONS & EXPORTS ──────────────────────── */
.modal-btn{ border-radius: 9999px; }
.export-btn{
  border-radius: 1rem;
  background: color-mix(in srgb, var(--card2) 70%, transparent);
  backdrop-filter: blur(8px);
}
.fab{
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px -10px color-mix(in srgb, var(--accent) 60%, transparent);
}

/* ───────────────────────── 6. MODALES ────────────────────────────────── */
.modal-overlay{ backdrop-filter: blur(10px); }
.modal{
  box-shadow: 0 24px 60px -18px rgba(0,0,0,.32);
  /* La règle bento (section 3) impose overflow:hidden à .modal, ce qui
     masquait le contenu dépassant max-height:90vh (diagnostic, export,
     bouton "Revoir le cours"). On restaure le scroll vertical. */
  overflow-y: auto;
  overflow-x: hidden;
}