:root{
  --paper:#FDF9F6;
  --ink:#20242E;
  --ink-soft:#5B6472;
  --line-blue:#C9C3EC;
  --line-blue-strong:#7A93B0;
  --margin-red:#E6A0C4;
  --accent:#0C5BA0;
  --accent-orange:#FF8208;
  --accent-teal:#26AAB1;
  --accent-yellow:#F8AF23;
  --white:#FFFFFF;
  --cream-box:#F3ECDD;

  --cat-N-bg:#FFD8B0; --cat-N-text:#8A4210;
  --cat-G-bg:#B9E8C4; --cat-G-text:#1F6B3A;
  --cat-D-bg:#BFDCFB; --cat-D-text:#1A4E9E;
  --cat-M-bg:#DCC9F7; --cat-M-text:#5B2F9E;
  --cat-P-bg:#FAC3DE; --cat-P-text:#9E1F5E;

  --radius:10px;
  --shadow:0 4px 22px rgba(31,58,92,.10), 0 1px 3px rgba(31,58,92,.08);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;overflow-x:hidden;}

/* Police OpenDyslexic (accessibilité, dyslexie) -- chargée depuis Fontsource/jsDelivr,
   licence SIL Open Font License (libre). Activée via body.font-dyslexic (bouton "Aa"
   dans la barre du haut). On cible large (body + texte courant) pour couvrir le cours,
   les exercices, les rédactions -- mais pas les formules KaTeX (rendues en police
   mathématique dédiée, changer leur police casserait l'alignement des symboles) ni le
   texte des figures SVG (polices fixées individuellement dans chaque figure). */
@font-face{
  font-family:'OpenDyslexic';
  font-style:normal;
  font-weight:400;
  font-display:swap;
  src:url(https://cdn.jsdelivr.net/fontsource/fonts/opendyslexic@latest/latin-400-normal.woff2) format('woff2'),
      url(https://cdn.jsdelivr.net/fontsource/fonts/opendyslexic@latest/latin-400-normal.woff) format('woff');
}
@font-face{
  font-family:'OpenDyslexic';
  font-style:normal;
  font-weight:700;
  font-display:swap;
  src:url(https://cdn.jsdelivr.net/fontsource/fonts/opendyslexic@latest/latin-700-normal.woff2) format('woff2'),
      url(https://cdn.jsdelivr.net/fontsource/fonts/opendyslexic@latest/latin-700-normal.woff) format('woff');
}
body.font-dyslexic,
body.font-dyslexic p, body.font-dyslexic li, body.font-dyslexic div, body.font-dyslexic span,
body.font-dyslexic td, body.font-dyslexic th, body.font-dyslexic button, body.font-dyslexic input,
body.font-dyslexic h1, body.font-dyslexic h2, body.font-dyslexic h3, body.font-dyslexic h4{
  font-family:'OpenDyslexic','Inter',sans-serif !important;
}
body.font-dyslexic .tex, body.font-dyslexic .katex, body.font-dyslexic .katex *{
  font-family:initial !important;
}

body{
  background:radial-gradient(circle at 15% 0%, #FFFEFC 0%, var(--paper) 55%);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{
  font-family:'Space Grotesk',sans-serif;
  letter-spacing:-0.01em;
}
code,.mono,.badge-code,.date-tag{font-family:'JetBrains Mono',monospace;}

a{color:inherit;text-decoration:none;}

/* ---------- layout shell ---------- */
.topbar{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  width:100%;
  padding:14px 28px;
  background:rgba(253,249,246,.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid rgba(28,43,57,.1);
}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.05rem;}
.brand-mark{width:26px;height:26px;flex:none;}
.nav-links{display:flex; gap:4px;}
.nav-links button{
  border:none;background:transparent;font-family:'Space Grotesk',sans-serif;
  font-size:.92rem; font-weight:600; color:var(--ink-soft);
  padding:8px 14px;border-radius:8px;cursor:pointer;transition:.15s;
}
.nav-links button:hover{background:rgba(28,43,57,.06); color:var(--ink);}
.nav-links button.active{background:#0D5BA3; color:var(--white);}
.nav-dropdown{position:relative;display:flex;align-items:center;}
.nav-dropdown > .nav-dropdown-trigger::after{content:'▾';font-size:.7em;margin-left:5px;opacity:.7;}
.nav-dropdown-menu{
  display:none;position:absolute;top:100%;left:0;background:var(--white);
  border:1px solid rgba(28,43,57,.12);border-radius:10px;box-shadow:var(--shadow);
  padding:6px;min-width:230px;z-index:80;margin-top:4px;
}
.nav-dropdown.open .nav-dropdown-menu{display:block;}
.nav-dropdown-menu button{display:block;width:100%;text-align:left;white-space:nowrap;border-radius:6px;}
.account-menu{position:relative;flex:none;margin-left:10px;}
.account-avatar{
  width:36px;height:36px;border-radius:50%;border:1px solid rgba(28,43,57,.15);background:var(--white);
  font-size:.92rem;font-weight:700;font-family:'Space Grotesk',sans-serif;color:var(--accent);letter-spacing:.02em;
  cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.15s;
}
.account-avatar:hover{background:rgba(28,43,57,.06);}
#dysToggleBtn.active{background:var(--accent);color:#fff;border-color:var(--accent);}
.account-dropdown{
  position:absolute;right:0;top:44px;width:250px;background:var(--white);border-radius:10px;
  box-shadow:var(--shadow);border:1px solid rgba(28,43,57,.1);padding:14px;z-index:50;
}
.account-dropdown input{padding:7px 9px;border-radius:6px;border:1px solid rgba(28,43,57,.2);font-family:'Inter',sans-serif;font-size:.85rem;}

.modal-overlay{position:fixed;inset:0;background:rgba(28,43,57,.5);z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;}
.modal-card{background:var(--white);border-radius:14px;padding:22px;max-width:420px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:0 24px 64px rgba(0,0,0,.28);}
.modal-close{border:none;background:transparent;font-size:1.1rem;cursor:pointer;color:var(--ink-soft);line-height:1;padding:4px;}
.modal-close:hover{color:var(--ink);}
.class-modal-item{
  display:flex;justify-content:space-between;align-items:center;padding:13px 16px;border-radius:10px;
  cursor:pointer;transition:.15s;margin-bottom:8px;border:1.5px solid rgba(28,43,57,.1);font-family:'Space Grotesk',sans-serif;font-weight:600;
}
.class-modal-item:hover{background:rgba(31,58,92,.06);border-color:rgba(31,58,92,.3);}
.class-modal-item.active{background:var(--accent);color:#fff;border-color:var(--accent);}

main{max-width:1080px;margin:0 auto;padding:40px 24px 100px;}
.breadcrumb{display:none;max-width:1080px;margin:0 auto;padding:14px 24px 0;align-items:center;flex-wrap:wrap;gap:6px;font-family:'Inter',sans-serif;font-size:.85rem;color:var(--ink-soft);}
.breadcrumb .bc-link{color:var(--accent);text-decoration:none;}
.breadcrumb .bc-link:hover{text-decoration:underline;}
.breadcrumb .bc-sep{color:var(--ink-soft);opacity:.5;}
.breadcrumb .bc-current{color:var(--ink);font-weight:600;}
.view{display:none;animation:fadein .35s ease;}
.view.active{display:block;}
@keyframes fadein{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

/* ---------- notebook (plain, no ruled lines) ---------- */
.notebook-scroll{max-height:72vh;overflow-y:auto;scroll-behavior:smooth;}
.plain-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid rgba(28,43,57,.08);}
#cahierEleveContent{padding:26px 30px;}
.nb-date-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin:22px 0 10px;flex-wrap:wrap;}
.nb-date-row:first-child{margin-top:0;}
.nb-date{font-family:'JetBrains Mono',monospace;font-size:.8rem;color:var(--accent-orange);font-weight:700;}
.nb-chapitre{font-family:'Space Grotesk',sans-serif;font-size:.85rem;color:var(--accent);font-weight:700;text-align:right;}
.nb-daysep{border:none;border-top:2px dashed var(--margin-red);opacity:.6;margin:18px 0;}
.nb-ref{text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:1.5px;font-weight:700;font-family:'Space Grotesk',sans-serif;font-size:1rem;margin-bottom:6px;}
.nb-ref-row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;}
.nb-remove-btn{
  flex:none;border:1px solid rgba(211,90,60,.35);background:rgba(211,90,60,.06);color:#a83c1f;
  font-family:'Space Grotesk',sans-serif;font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:20px;
  cursor:pointer;white-space:nowrap;transition:.15s;
}
.nb-remove-btn:hover{background:rgba(211,90,60,.16);}
.nb-body{font-size:1rem;line-height:1.9;margin-bottom:20px;}
.nb-body b{color:var(--ink);}
.nb-figure-row{padding:6px 0;}

/* ---------- mise en page façon manuel (sections numérotées, Définition/Règles) ---------- */
.lesson-header{
  display:flex;align-items:center;gap:14px;background:var(--accent-orange);color:#fff;
  padding:12px 20px;border-radius:10px;margin:34px 0 16px;
}
.lesson-header:first-child{margin-top:0;}
.lesson-header .num{
  width:32px;height:32px;border-radius:50%;background:#fff;color:var(--accent-orange);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-family:'Space Grotesk',sans-serif;flex:none;
}
.lesson-header h3{margin:0;font-family:'Space Grotesk',sans-serif;font-style:italic;font-size:1.15rem;font-weight:700;}
.def-badge{
  display:inline-block;background:#8A4210;color:#fff;font-weight:700;font-size:.8rem;
  padding:5px 16px;border-radius:6px;margin-bottom:10px;font-family:'Space Grotesk',sans-serif;
}
.def-box{background:var(--cream-box);border-radius:8px;padding:14px 20px;margin:0 0 18px;position:relative;}
.def-box:last-child{margin-bottom:0;}
.read-aloud-btn{
  float:right;margin:0 0 6px 10px;border:none;background:rgba(28,43,57,.08);color:var(--ink);
  border-radius:50%;width:28px;height:28px;font-size:.9rem;cursor:pointer;transition:.15s;
  display:inline-flex;align-items:center;justify-content:center;line-height:1;
}
.read-aloud-btn:hover{background:rgba(28,43,57,.16);}
.read-aloud-btn.reading{background:var(--accent);color:#fff;}
.example-list{margin:0 0 20px;padding:0;list-style:none;}
.example-list li{position:relative;padding-left:20px;margin-bottom:8px;line-height:1.6;}
.example-list li::before{content:"▶";position:absolute;left:0;top:1px;color:var(--accent-orange);font-size:.7rem;}
.example-title{font-weight:700;margin:0 0 8px;font-family:'Space Grotesk',sans-serif;}
.hl{background:rgba(227,93,58,.16);border-radius:4px;padding:2px 6px;color:var(--accent-orange);font-weight:700;}
.grp-a{color:var(--accent-orange);font-weight:700;}
.grp-b{color:var(--accent);font-weight:700;}
.step-display{font-family:'Inter',sans-serif;font-size:1rem;text-align:left;padding:24px 10px 24px 30px;background:var(--white);border-radius:8px;border:1px solid rgba(28,43,57,.1);}
.step-column{display:inline-flex;flex-direction:column;gap:6px;}
.step-column > div{margin-bottom:6px;}
.step-column > div:last-child{margin-bottom:0;}
.step-final{font-weight:700;color:var(--accent-orange);}
.dp-sub-inner{display:inline-block;border-bottom:1.5px solid #1C1B2E;padding-bottom:2px;}
.dp-tag{font-family:'Space Grotesk',sans-serif;font-size:.66rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em;}
.we-row{display:flex;justify-content:space-between;align-items:baseline;gap:20px;flex-wrap:wrap;padding:3px 0;}
.we-expr{font-family:'JetBrains Mono',monospace;font-size:1.05rem;}
.we-comment{color:var(--ink-soft);font-size:.85rem;text-align:right;flex:1;min-width:140px;}
.we-row:last-child .we-expr{font-weight:700;color:var(--accent-orange);}
.step-display .step-note{font-family:'Inter',sans-serif;font-size:.9rem;color:var(--ink-soft);margin-top:12px;}
.sub-header{display:flex;align-items:center;gap:10px;margin:24px 0 12px;}
.sub-header:first-of-type{margin-top:4px;}
.sub-header .letter{
  width:26px;height:26px;border-radius:7px;background:var(--accent-orange);color:#fff;flex:none;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-family:'Space Grotesk',sans-serif;font-size:.85rem;
}
.sub-header h4{margin:0;font-family:'Space Grotesk',sans-serif;font-size:1.02rem;font-weight:700;color:var(--ink);}
.prop-badge{
  display:inline-block;background:var(--accent-teal);color:#fff;font-weight:700;font-size:.8rem;
  padding:5px 16px;border-radius:6px;margin-bottom:10px;font-family:'Space Grotesk',sans-serif;
}
.history-box{
  background:rgba(248,175,35,.09);border:1px dashed rgba(248,175,35,.5);border-radius:8px;
  padding:14px 20px;margin:26px 0 0;font-size:.9rem;line-height:1.65;
}
.history-box .history-title{
  font-family:'Space Grotesk',sans-serif;font-weight:700;font-style:italic;color:#8a6205;
  margin-bottom:6px;display:flex;align-items:center;gap:8px;
}
.ceb-tile{
  min-width:64px;height:64px;padding:0 10px;border-radius:12px;border:2px solid rgba(28,43,57,.15);
  background:var(--white);font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.3rem;
  cursor:pointer;transition:transform .1s ease, border-color .15s ease;
}
.ceb-tile:hover{border-color:var(--accent-orange);transform:translateY(-2px);}
.ceb-tile-selected{border-color:var(--accent-orange);background:rgba(255,130,8,.1);}
.ceb-op-btn{
  width:52px;height:52px;border-radius:50%;border:2px solid rgba(28,43,57,.15);background:var(--white);
  font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.3rem;cursor:pointer;
}
.ceb-op-btn:disabled{opacity:.35;cursor:not-allowed;}
.ceb-op-btn:not(:disabled):hover{border-color:var(--accent-teal);}
.ceb-op-selected{border-color:var(--accent-teal);background:rgba(38,170,177,.12);}
.ceb-stat-line{font-size:.88rem;color:var(--ink-soft);margin:3px 0;}

/* ---------- home ---------- */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;margin-bottom:56px;}
.hero h1{font-size:2.6rem;line-height:1.08;margin:0 0 14px;}
.hero p.lede{color:var(--ink-soft);font-size:1.05rem;line-height:1.55;max-width:46ch;margin:0 0 26px;}
.eyebrow{
  display:inline-block;font-family:'JetBrains Mono',monospace;font-size:.72rem;
  letter-spacing:.08em;text-transform:uppercase;color:var(--accent);
  background:rgba(31,58,92,.08); padding:4px 10px;border-radius:20px;margin-bottom:14px;
}
.hero-figure{aspect-ratio:1/1; display:flex;align-items:center;justify-content:center;}

.level-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:10px;}
.level-card{
  padding:26px 24px;border-radius:var(--radius);cursor:pointer;
  border:1px solid rgba(28,43,57,.1); background:var(--white);
  box-shadow:var(--shadow); transition:.18s; position:relative; overflow:hidden;
}
.level-card:hover{transform:translateY(-3px); box-shadow:0 8px 24px rgba(28,43,57,.14);}
.level-card .lvl-num{font-family:'Space Grotesk',sans-serif;font-size:2.6rem;font-weight:700;line-height:1;}
.level-card .lvl-name{color:var(--ink-soft);font-size:.95rem;margin-top:4px;}
.level-card .lvl-count{margin-top:14px;font-size:.82rem;color:var(--ink-soft);font-family:'JetBrains Mono',monospace;}
.level-card.n6::before, .level-card.n5::before{
  content:""; position:absolute; right:-30px; top:-30px; width:120px;height:120px;border-radius:50%;
}
.level-card.n6::before{background:radial-gradient(circle, rgba(255,130,8,.16), transparent 70%);}
.level-card.n5::before{background:radial-gradient(circle, rgba(12,91,160,.16), transparent 70%);}
.level-card.n6{border-top:3px solid var(--accent-orange);}
.level-card.n5{border-top:3px solid var(--accent);}

.section-title{display:flex;align-items:baseline;gap:10px;margin:44px 0 16px;}
.section-title h2{font-size:1.3rem;margin:0;}
.section-title .count{color:var(--ink-soft);font-size:.85rem;font-family:'JetBrains Mono',monospace;}

.mini-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px;}
.mini-link{
  padding:18px;border-radius:var(--radius);background:var(--white);border:1px solid rgba(28,43,57,.1);
  box-shadow:var(--shadow);cursor:pointer;transition:.15s;
}
.mini-link:hover{transform:translateY(-2px);}
.mini-link .t{font-weight:600;font-family:'Space Grotesk',sans-serif;}
.mini-link .d{color:var(--ink-soft);font-size:.85rem;margin-top:4px;}

/* ---------- niveau view ---------- */
.niveau-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-bottom:22px;}
.back-btn{
  display:inline-flex;align-items:center;gap:6px;font-size:.85rem;font-weight:600;color:var(--ink-soft);
  cursor:pointer;padding:6px 4px;
}
.back-btn:hover{color:var(--ink);}
.view-toggle{display:flex;background:rgba(28,43,57,.06);border-radius:8px;padding:3px;}
.view-toggle button{border:none;background:transparent;padding:7px 14px;border-radius:6px;font-size:.82rem;font-weight:600;cursor:pointer;font-family:'Space Grotesk',sans-serif;color:var(--ink-soft);}
.view-toggle button.active{background:var(--white);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12);}

.cat-block{margin-bottom:30px;}
.cat-label{
  display:inline-flex;align-items:center;gap:8px;font-family:'Space Grotesk',sans-serif;font-weight:700;
  font-size:.95rem;margin-bottom:12px;padding:5px 12px 5px 5px;border-radius:20px;
}
.cat-dot{width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:.68rem;font-weight:700;}

.chap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;}
.chap-card{
  background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:var(--radius);
  padding:16px;cursor:pointer;transition:.15s;border-left:5px solid transparent;position:relative;
}
.chap-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.chap-card .code{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:var(--ink-soft);}
.chap-card .titre{font-family:'Space Grotesk',sans-serif;font-weight:600;margin:6px 0 10px;line-height:1.25;font-size:.98rem;}
.chap-card .meta{display:flex;justify-content:space-between;font-size:.74rem;color:var(--ink-soft);}
.chap-card .status{
  position:absolute; top:12px; right:12px; font-size:.65rem; padding:2px 7px; border-radius:20px;
  font-family:'JetBrains Mono',monospace; background:rgba(28,43,57,.07); color:var(--ink-soft);
}
.chap-card.ready .status{background:rgba(45,106,79,.15); color:#2C5A2E;}

/* timeline view */
.timeline{position:relative; padding-left:20px; border-left:2px solid rgba(28,43,57,.12);}
.tl-period{margin-bottom:26px;}
.tl-period-label{font-family:'JetBrains Mono',monospace; font-size:.75rem; color:var(--ink-soft); margin-bottom:10px;}
.tl-vac{
  font-size:.78rem; color:var(--accent-orange); font-weight:600; margin:14px 0 14px -20px; padding-left:20px;
  border-left:2px dashed var(--accent-orange);
}
.tl-item{
  display:flex;align-items:center;gap:12px;background:var(--white);border:1px solid rgba(28,43,57,.1);
  border-radius:8px; padding:10px 14px; margin-bottom:8px; cursor:pointer; transition:.15s;
}
.tl-item:hover{transform:translateX(3px);}
.tl-item .dot{width:10px;height:10px;border-radius:50%;flex:none;}
.tl-item .titre{font-weight:600;font-size:.9rem;flex:1;}
.tl-item .dates{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:var(--ink-soft);white-space:nowrap;}
.tl-item.tl-done{background:rgba(31,107,58,.05);border-color:rgba(31,107,58,.25);}
.tl-content-badge{font-size:.68rem;font-weight:700;padding:3px 9px;border-radius:20px;white-space:nowrap;flex:none;font-family:'Space Grotesk',sans-serif;}
.tl-content-badge.ready{background:rgba(38,170,177,.15);color:var(--accent-teal);}
.tl-content-badge.missing{background:rgba(28,43,57,.06);color:var(--ink-soft);}
.tl-check{
  flex:none;width:20px;height:20px;border-radius:50%;background:#1F6B3A;color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;
}

/* ---------- chapitre view ---------- */
.chap-head{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:16px;margin-bottom:8px;}
.chap-head h1{font-size:1.9rem;margin:6px 0 6px;}
.chap-tags{display:flex;gap:8px;align-items:center;}
.tag{font-family:'JetBrains Mono',monospace;font-size:.72rem;padding:3px 9px;border-radius:20px;}

.tabs{display:flex;gap:6px;margin:26px 0 20px;border-bottom:1px solid rgba(28,43,57,.12);}
.tab-btn{
  border:none;background:transparent;padding:10px 16px;font-family:'Space Grotesk',sans-serif;font-weight:600;
  font-size:.9rem;color:var(--ink-soft);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;
}
.tab-btn.active{color:var(--ink);border-bottom-color:var(--accent);}
.tab-panel{display:none;}
.tab-panel.active{display:block;animation:fadein .3s ease;}

.tool-group-tabs{border-bottom:1px solid rgba(28,43,57,.1);}
.tool-tab-btn{
  border:none;background:transparent;padding:8px 14px;font-family:'Space Grotesk',sans-serif;font-weight:600;
  font-size:.85rem;color:var(--ink-soft);cursor:pointer;border-radius:8px 8px 0 0;
}
.tool-tab-btn.active{color:#fff;background:var(--accent);}

.tool-icon-btn{
  border:1px solid rgba(28,43,57,.12); background:#fff; border-radius:10px;
  width:44px; height:44px; font-size:1.3rem; cursor:pointer; display:inline-flex;
  align-items:center; justify-content:center; transition:background .15s, border-color .15s;
  color:var(--ink-soft);
}
.tool-icon-btn:hover{background:rgba(28,43,57,.05); border-color:rgba(28,43,57,.25); color:var(--ink);}

.placeholder-box{
  border:1.5px dashed rgba(28,43,57,.25); border-radius:var(--radius); padding:34px; text-align:center;
  color:var(--ink-soft); background:rgba(28,43,57,.02);
}
.placeholder-box strong{display:block;color:var(--ink);font-family:'Space Grotesk',sans-serif;margin-bottom:6px;font-size:1.05rem;}

.pt-cross{stroke-linecap:square;}
.pt-tick{stroke-linecap:square;}
.vertex-handle{fill:transparent;stroke:none;transition:.12s;}
.vertex-handle:hover, .vertex-handle.dragging{fill:rgba(31,58,92,.14);stroke:#1F3A5C;stroke-width:1.2;}
.redaction-note{
  background:rgba(227,93,58,.08);border:1px solid rgba(227,93,58,.25);
  border-radius:8px;padding:10px 14px;font-size:.82rem;line-height:1.6;color:#8A2E1C;margin-bottom:16px;
}
.figure-wrap{
  background:var(--white); border:1px solid rgba(28,43,57,.1); border-radius:var(--radius); padding:18px;
  box-shadow:var(--shadow); margin-bottom:18px;
}
.figure-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px;align-items:center;}
button.btn{
  font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:.85rem; border:none; cursor:pointer;
  padding:9px 16px; border-radius:8px; background:var(--accent); color:#fff; transition:.15s;
}
button.btn:hover{filter:brightness(1.08);}
button.btn.secondary{background:rgba(28,43,57,.08); color:var(--ink);}
button.btn.orange{background:var(--accent-orange);}
button.btn:disabled{opacity:.4;cursor:not-allowed;}
.hint{font-size:.78rem;color:var(--ink-soft);margin-top:8px;}

/* Dominance de couleur par niveau (issue du logo) : orange pour la 6e, bleu pour la 5e. */
#view-chapitre.lvl-6e .tab-btn.active{border-bottom-color:var(--accent-orange);}
#view-chapitre.lvl-6e button.btn:not(.secondary):not(.orange){background:var(--accent-orange);}
#view-chapitre.lvl-5e .tab-btn.active{border-bottom-color:var(--accent);}
#view-chapitre.lvl-5e button.btn:not(.secondary):not(.orange){background:var(--accent);}
#view-chapitre.lvl-5e .lesson-header{background:var(--accent);}
#view-chapitre.lvl-5e .lesson-header .num{color:var(--accent);}
#view-chapitre.lvl-5e .sub-header .letter{background:var(--accent);}

.step-list{margin-top:14px;}
.step-item{
  display:flex;gap:12px;padding:10px 0;border-bottom:1px solid rgba(28,43,57,.08);opacity:.35;transition:.25s;
}
.step-item.done{opacity:1;}
.step-num{
  width:22px;height:22px;border-radius:50%;background:var(--ink);color:#fff;font-size:.72rem;
  display:flex;align-items:center;justify-content:center;flex:none;font-family:'JetBrains Mono',monospace;
}
.step-item.done .step-num{background:var(--accent);}

.redaction-block{background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:var(--radius);padding:22px;margin-bottom:16px;box-shadow:var(--shadow);}
.redaction-block h3{margin:0 0 10px;font-size:1.02rem;}
.redaction-template{
  background:rgba(31,58,92,.06); border-left:3px solid var(--accent); padding:12px 16px; border-radius:6px;
  font-size:.9rem; line-height:1.65; margin:10px 0;
}
.redaction-template .fill{color:var(--accent-orange);font-weight:600;}
.exo-card{border:1px solid rgba(28,43,57,.1);border-radius:8px;padding:16px;margin-top:12px;}
.exo-card .num{font-family:'JetBrains Mono',monospace;color:var(--ink-soft);font-size:.78rem;}

.quiz-shell{background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);}
.api-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:14px 0;}
.api-row input{
  flex:1;min-width:220px;padding:10px 12px;border-radius:8px;border:1px solid rgba(28,43,57,.2);font-family:'JetBrains Mono',monospace;font-size:.85rem;
}
.quiz-q{border-top:1px solid rgba(28,43,57,.1);padding:16px 0;}
.quiz-opt{
  display:block;width:100%;text-align:left;padding:10px 14px;margin:6px 0;border-radius:8px;
  border:1px solid rgba(28,43,57,.15);background:var(--paper);cursor:pointer;font-family:'Inter',sans-serif;font-size:.9rem;
}
.quiz-opt.correct{background:rgba(45,106,79,.18);border-color:#2C5A2E;}
.quiz-opt.wrong{background:rgba(211,90,60,.15);border-color:#a83c1f;}

/* ---------- automatismes ---------- */
.cm-picker{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;margin-bottom:22px;}
.cm-chip{
  background:var(--white);border:1px solid rgba(28,43,57,.12);border-radius:8px;padding:10px 12px;
  cursor:pointer;font-size:.83rem;transition:.15s;position:relative;
}
.cm-chip:hover{border-color:var(--accent);}
.cm-chip.active{background:var(--accent);color:#fff;}
.cm-chip .seq{font-family:'JetBrains Mono',monospace;font-size:.7rem;opacity:.7;}
.cm-chip-badge{position:absolute;top:8px;right:8px;width:9px;height:9px;border-radius:50%;}
.cm-chip-badge.cm-badge-done{background:#C77D1E;}
.cm-chip-badge.cm-badge-perfect{background:#1F6B3A;}
.cm-chip-records{margin-top:8px;padding-top:6px;border-top:1px dashed rgba(28,43,57,.15);font-family:'JetBrains Mono',monospace;font-size:.7rem;color:var(--ink-soft);display:flex;flex-wrap:wrap;gap:8px;}
.cm-timer{font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:700;color:var(--accent);}
.pgame-board{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:380px;margin:0 auto;}
.pgame-col{display:flex;flex-direction:column;gap:8px;}
.pgame-card{
  background:var(--white);border:1px solid rgba(28,43,57,.16);border-radius:8px;padding:10px 12px;
  text-align:center;cursor:pointer;font-size:.9rem;transition:.15s;user-select:none;
}
.pgame-card:hover{border-color:var(--accent);}
.pgame-card.selected{border-color:var(--accent);background:rgba(31,58,92,.08);}
.pgame-card.matched{background:rgba(31,107,58,.1);border-color:#1F6B3A;color:#1F6B3A;font-weight:700;cursor:default;}
.pgame-card.wrong{border-color:#9E1F5E;background:rgba(158,31,94,.08);}
.cm-legend-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:4px;vertical-align:middle;}
.cm-legend-dot.cm-legend-done{background:#C77D1E;}
.cm-legend-dot.cm-legend-perfect{background:#1F6B3A;}
.cm-records{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;}
.cm-record-box{background:var(--paper);border-radius:8px;padding:8px 14px;font-size:.85rem;flex:1;min-width:130px;text-align:center;}
.cm-record-box .cm-record-val{display:block;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:1.05rem;margin-top:2px;}
.cm-record-box.cm-record-mine{background:rgba(31,58,92,.08);}
.cm-workspace{background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);}
.cm-q-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin:18px 0;}
.cm-q{background:var(--paper);border-radius:8px;padding:14px;font-family:'JetBrains Mono',monospace;font-size:.95rem;}
.cm-q input{width:64px;padding:4px 6px;border-radius:5px;border:1px solid rgba(28,43,57,.25);font-family:'JetBrains Mono',monospace;}
.cm-q.ok input{background:rgba(45,106,79,.15);border-color:#2C5A2E;}
.cm-q.ko input{background:rgba(211,90,60,.12);border-color:#a83c1f;}

footer{text-align:center;color:var(--ink-soft);font-size:.78rem;padding:30px;}
footer a{text-decoration:underline;text-underline-offset:2px;}
footer a:hover{color:var(--accent);}

/* ---------- print export ---------- */
@media print{
  .topbar, .tabs, .back-btn, .figure-toolbar, footer, .view-toggle, .nav-links,
  .chap-tags, #correctionForm, .correction-toolbar, .cahier-list-actions { display:none !important; }
  main{padding:0;max-width:100%;}
  body{background:#fff;}
  .figure-wrap, .redaction-block{box-shadow:none;border:1px solid #ccc;break-inside:avoid;}
  .cahier-entry{break-inside:avoid;border:none;padding:0 0 18px;}
}

/* ---------- outil prof : correction projetée ---------- */
.tool-shell{background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:20px;}
.tool-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px;}
.tool-row select, .tool-row input[type=text]{
  padding:9px 12px;border-radius:8px;border:1px solid rgba(28,43,57,.2);font-family:'Inter',sans-serif;font-size:.88rem;
}
#correctionInput{
  width:100%;min-height:120px;padding:14px;border-radius:8px;border:1px solid rgba(28,43,57,.2);
  font-family:'JetBrains Mono',monospace;font-size:1rem;line-height:1.6;resize:vertical;
}
.correction-preview{
  background:var(--paper);border:1.5px dashed rgba(28,43,57,.25);border-radius:8px;padding:20px;
  min-height:100px;font-size:1.15rem;line-height:2;margin-top:14px;transition:.2s;
}
.cor-header{margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid rgba(28,43,57,.12);}
.cor-header-title{font-family:'Space Grotesk',sans-serif;font-weight:700;color:var(--accent);font-size:1.05rem;}
.cor-header-date{font-size:.85rem;color:var(--ink-soft);margin-top:2px;text-transform:capitalize;}

.hint-mono{font-family:'JetBrains Mono',monospace;font-size:.76rem;color:var(--ink-soft);}
.format-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:8px;}
.fmt-btn{width:32px;height:32px;border-radius:6px;border:1px solid rgba(28,43,57,.2);background:#fff;cursor:pointer;font-family:'Space Grotesk',sans-serif;font-size:.9rem;}
.fmt-btn:hover{background:rgba(28,43,57,.06);}
.fmt-swatch{width:22px;height:22px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px rgba(28,43,57,.25);background:var(--c);cursor:pointer;padding:0;}
.fmt-swatch:hover{box-shadow:0 0 0 2px rgba(28,43,57,.45);}
.fig-mode.active{background:var(--accent);color:#fff;}
.cahier-entry{
  background:var(--white);border:1px solid rgba(28,43,57,.1);border-radius:8px;padding:16px 18px;margin-bottom:12px;
  display:flex;justify-content:space-between;gap:14px;align-items:flex-start;
}
.cahier-entry .ref{font-family:'JetBrains Mono',monospace;font-size:.74rem;color:var(--ink-soft);margin-bottom:4px;}
.cahier-entry .body{font-size:1.02rem;line-height:1.9;flex:1;}
.cahier-entry .remove{border:none;background:transparent;color:var(--accent-orange);cursor:pointer;font-size:.8rem;font-weight:600;flex:none;}
.hamburger{
  display:none;flex-direction:column;justify-content:center;align-items:center;gap:4px;
  width:36px;height:36px;flex:none;border:none;background:transparent;cursor:pointer;padding:0;
}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;}
@media (max-width:720px){
  .hero{grid-template-columns:1fr;}
  .level-grid{grid-template-columns:1fr;}
  .mini-links{grid-template-columns:1fr;}
  .nav-links button{padding:8px 9px;font-size:.82rem;}
  /* Sur petit écran, chaque pixel compte pour les figures et widgets interactifs (rapporteur,
     schémas...) : on réduit les marges qui ne servent qu'à aérer la mise en page. */
  main{padding-left:10px;padding-right:10px;}
  .figure-wrap{padding-left:8px;padding-right:8px;}

  /* Menu hamburger : le logo agrandi laisse peu de place pour la liste des boutons de
     navigation sur mobile, on la replie donc dans un panneau déroulant. */
  .hamburger{display:flex;}
  .nav-links{
    display:none; position:absolute; top:100%; left:0; right:0; z-index:60;
    flex-direction:column; gap:2px; background:var(--paper);
    padding:8px; border-bottom:1px solid rgba(28,43,57,.12);
    box-shadow:0 10px 20px rgba(28,43,57,.12);
  }
  .nav-links.open{display:flex;}
  /* Sur mobile, les sous-menus restent toujours dépliés (pas de clic pour ouvrir) : le bouton
     de groupe devient un simple intitulé de section, les options suivent en retrait. */
  .nav-dropdown{display:contents;}
  .nav-dropdown-trigger{font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;opacity:.55;pointer-events:none;padding-bottom:0;margin-top:6px;}
  .nav-dropdown-trigger::after{display:none;}
  .nav-dropdown-menu{
    display:block !important;position:static;box-shadow:none;border:none;padding:0;margin:0 0 4px;
    background:transparent;min-width:0;
  }
  .nav-dropdown-menu button{padding-left:22px;}
  .nav-links button{width:100%;text-align:left;padding:12px 14px;font-size:.92rem;}
  .brand-mark{height:40px !important;}

  /* Barre d'onglets des chapitres (Cours/Méthode/Exercices/Quiz/Histoire) : 5 onglets ne
     tiennent pas sur la largeur d'un téléphone. Plutôt que de les tasser ou de les faire
     retourner à la ligne, on les rend défilables horizontalement, sur une seule ligne. */
  .tabs{overflow-x:auto;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;scrollbar-width:thin;}
  .tab-btn{white-space:nowrap;flex:none;padding:10px 12px;font-size:.82rem;}
}

/* KaTeX applique par défaut font:1.21em à sa classe racine .katex (voir katex.css),
   ce qui fait apparaître toutes les formules ~21% plus grandes que le texte
   environnant. On neutralise ce facteur pour aligner la taille des formules
   (fractions, \widehat, etc.) sur celle du texte courant. Même ramenée à une
   taille nominale égale, la police mathématique de KaTeX paraît visuellement
   plus petite que le texte courant (métriques de police différentes) : on
   compense donc par un léger surplus. */
.katex { font-size: 1.18em; }

/* ---------- modale signalement de bug ---------- */
.bug-tab{background:none;border:none;padding:8px 4px;margin-right:14px;font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:.9rem;color:var(--ink-soft);cursor:pointer;border-bottom:2px solid transparent;}
.bug-tab.active{color:var(--accent);border-bottom-color:var(--accent);}

/* ---------- bouton bascule (ex: lecture intérieure/extérieure du rapporteur) ---------- */
button.btn.secondary.active{background:var(--accent);color:#fff;}