/* ═══════════════════════════════════════════════════════════════
   prof-prive.com — Charte commune des ressources de SECONDE
   Cours · Exercices · TP · Évaluations
   Palette du site : navy #1E3A5F · orange #EC5F2A · cyan #2DABCF
   ═══════════════════════════════════════════════════════════════ */
:root{
  --navy:#1E3A5F; --blue:#2C5AA0; --cyan:#2DABCF; --cyan-d:#0E6F8C;
  --orange:#EC5F2A; --orange-d:#C2461A; --gold:#FF8C00; --gold-d:#9A5200;
  --green:#1F7A4D; --green-bg:#E8F6EE; --red:#B3362C; --red-bg:#FDEDEB;
  --violet:#5B3FA8;
  --bg:#F6F8FA; --paper:#FFFFFF; --ink:#14202B; --text2:#2F3E4C; --text3:#4E5D6B;
  --line:#DCE3EA; --soft:#EEF4F9; --soft-cyan:#E9F6FB; --soft-gold:#FFF5E6; --soft-orange:#FFEFE8;
  --radius:10px; --shadow:0 3px 14px rgba(30,58,95,.08);
  --fs-body:18px; --fs-text:16.5px; --fs-small:14px; --fs-table:16px;
  --pp-top:0px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:var(--fs-body);line-height:1.65;-webkit-font-smoothing:antialiased}
p,li{font-size:var(--fs-text)}
strong,b{font-weight:700;color:var(--navy)}
a{color:var(--cyan-d)}
img,svg,canvas{max-width:100%}
button,input,textarea,select{font:inherit}
.k-o{color:var(--orange-d);font-weight:700}   /* vocabulaire clé orange */
.k-b{color:var(--blue);font-weight:700}       /* vocabulaire clé bleu   */
.k-c{color:var(--cyan-d);font-weight:700}
.k-g{color:var(--green);font-weight:700}
.k-v{color:var(--violet);font-weight:700}
.muted{color:var(--text3)}
.small{font-size:var(--fs-small)}
.center{text-align:center}
.nowrap{white-space:nowrap}

/* ── HERO ─────────────────────────────────────────────── */
.pp-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;
  padding:3.2rem 1.2rem 2.8rem;text-align:center}
.pp-hero.tp{background:linear-gradient(135deg,#0E5C74,var(--cyan))}
.pp-hero.exo{background:linear-gradient(160deg,var(--cyan) 0%,var(--navy) 100%)}
.pp-hero .wm{position:absolute;font:800 clamp(1.8rem,7vw,3.6rem)/1 "Playfair Display",Georgia,serif;color:rgba(255,255,255,.10);
  white-space:nowrap;pointer-events:none}
.pp-hero .wm.a{right:8px;top:6px;transform:rotate(-7deg)}
.pp-hero .wm.b{left:8px;bottom:6px;transform:rotate(5deg);font-size:clamp(1.4rem,6vw,3rem)}
.pp-hero-in{position:relative;z-index:1;max-width:820px;margin:auto}
.eyebrow{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#fff;
  font-size:13.5px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;padding:6px 16px;border-radius:20px;margin-bottom:1rem}
.pp-hero h1{font:700 clamp(1.9rem,4.6vw,2.9rem)/1.15 "Playfair Display",Georgia,serif;margin:.2rem 0 1rem;letter-spacing:-.5px}
.pp-hero h1 span{color:#FFD9A8}
.pp-hero p{font-size:18px;color:rgba(255,255,255,.94);max-width:62ch;margin:0 auto}
.pp-hero .chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:1.2rem}
.pp-hero .chip{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);padding:5px 12px;border-radius:16px;font-size:14px;font-weight:600}
.pp-hero .back{display:inline-block;margin-top:1.1rem;color:#fff;font-size:15px;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.5)}

/* ── NAVIGATION DE CHAPITRE (pastilles collantes) ───────── */
.pp-cnav{position:sticky;top:var(--pp-top);z-index:40;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);
  overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.pp-cnav div{display:flex;gap:6px;max-width:1080px;margin:auto;padding:9px 12px;min-width:max-content}
.pp-cnav a{color:var(--navy);text-decoration:none;font-size:14.5px;font-weight:600;padding:7px 12px;border-radius:18px;border:1px solid transparent;white-space:nowrap}
.pp-cnav a:hover,.pp-cnav a.on{background:var(--soft-cyan);border-color:var(--cyan)}
.pp-cnav a.res{background:var(--orange);color:#fff}
.pp-cnav a.res:hover{background:var(--orange-d)}

/* ── STRUCTURE ────────────────────────────────────────── */
main.pp-main{max-width:1000px;margin:auto;padding:2.6rem 1.2rem 2rem}
.pp-sec{margin:0 0 3.4rem;scroll-margin-top:calc(var(--pp-top) + 70px)}
.pp-h2{display:flex;gap:12px;align-items:center;font:700 clamp(1.6rem,3.8vw,2.15rem)/1.2 "Playfair Display",Georgia,serif;color:var(--navy);margin:0 0 1rem}
.pp-h2 .n{display:grid;place-items:center;min-width:44px;height:44px;border-radius:10px;background:var(--navy);color:#fff;font:700 18px Inter,sans-serif}
h3{font:700 1.22rem/1.3 "Playfair Display",Georgia,serif;color:var(--navy);margin:1.6rem 0 .6rem}
h4{font-size:1.05rem;color:var(--navy);margin:1.2rem 0 .4rem}
.lead{font-size:18px;color:var(--text2)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.1rem}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.3rem;box-shadow:var(--shadow)}
.card h3,.card h4{margin-top:0}

/* ── ENCADRÉS PÉDAGOGIQUES (6 types, pas plus) ─────────── */
.box{border-radius:0 var(--radius) var(--radius) 0;padding:1rem 1.2rem;margin:1.1rem 0;border-left:6px solid}
.box>.tag{display:inline-block;font-size:13.5px;font-weight:800;letter-spacing:.6px;text-transform:uppercase;margin-bottom:.35rem}
.box p:first-of-type{margin-top:.2rem}
.box p:last-child{margin-bottom:0}
.box.def{background:var(--soft-cyan);border-color:var(--cyan)}         .box.def>.tag{color:var(--cyan-d)}
.box.loi{background:#EEF2FA;border-color:var(--navy)}                   .box.loi>.tag{color:var(--navy)}
.box.meth{background:#F3F0FB;border-color:var(--violet)}                .box.meth>.tag{color:var(--violet)}
.box.ex{background:var(--green-bg);border-color:var(--green)}           .box.ex>.tag{color:var(--green)}
.box.piege{background:var(--soft-orange);border-color:var(--orange)}    .box.piege>.tag{color:var(--orange-d)}
.box.retenir{background:var(--soft-gold);border-color:var(--gold)}      .box.retenir>.tag{color:var(--gold-d)}
.box.vie{background:var(--paper);border-color:var(--line);border-left-color:var(--blue)} .box.vie>.tag{color:var(--blue)}
mjx-container[display="true"],.step mjx-container,.cs mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden}
.formule{background:#fff;border:1px solid var(--line);border-radius:8px;padding:.9rem 1rem;margin:.8rem 0;text-align:center;font-size:20px;overflow-x:auto}
.sym{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 12px;font-size:16px;margin:.6rem 0}
.sym dt{font-weight:700;color:var(--navy)}
.sym dd{margin:0}

/* ── ÉTAPES ───────────────────────────────────────────── */
.steps{counter-reset:s;margin:.6rem 0}
.step{counter-increment:s;display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;margin:.7rem 0;align-items:start}
.step::before{content:counter(s);display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;font-size:15px}

/* ── TABLEAUX ─────────────────────────────────────────── */
.tbl-wrap{overflow-x:auto;margin:1rem 0}
table.t{width:100%;border-collapse:collapse;background:#fff;font-size:var(--fs-table)}
table.t th{background:var(--navy);color:#fff;padding:9px 10px;text-align:center;font-weight:600}
table.t td{border:1px solid var(--line);padding:8px 10px;text-align:center}
table.t tr:nth-child(even) td{background:#F8FAFC}
table.t td.l,table.t th.l{text-align:left}
table.t input{width:100%;min-width:70px;border:1px solid var(--line);border-radius:6px;padding:5px;text-align:center;font-size:16px}

/* ── SIMULATIONS (fond sombre, texte clair) ───────────── */
.lab{background:#10283A;color:#EAF3F9;border-radius:12px;padding:1.1rem;margin:1.2rem 0}
.lab h4{color:#FFD9A8;margin:0 0 .6rem;font-size:1.1rem}
.lab p{color:#DCE9F2}
.lab canvas{display:block;width:100%;height:auto;background:#163548;border-radius:9px;touch-action:none}
.lab .ctrls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:.8rem}
.lab label{font-size:15px;font-weight:600;display:flex;gap:8px;align-items:center}
.lab input[type=range]{accent-color:var(--gold);width:170px}
.lab .lab-btn{background:rgba(255,255,255,.13);color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:8px;padding:8px 14px;font-weight:600;font-size:15px;cursor:pointer}
.lab .lab-btn.on,.lab .lab-btn:hover{background:var(--orange);border-color:var(--orange)}
.lab .ro{display:flex;flex-wrap:wrap;gap:8px;margin-top:.7rem;align-items:center}
.lab .ro>span{background:rgba(255,255,255,.09);border-radius:8px;padding:6px 11px;font-size:15px}
.lab .ro b{color:#FFD9A8;color:#FFD9A8}
.lab .legend{font-size:14.5px;color:#C9DBE7;margin-top:.5rem}
.lab mjx-container{color:#fff}
.lab b,.lab strong{color:#FFD9A8}
.lab label b{min-width:4.2em;display:inline-block}

/* ── BOUTONS ──────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:6px;border:0;border-radius:22px;background:var(--orange);color:#fff;padding:10px 18px;font-weight:700;font-size:15.5px;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--orange-d)}
.btn.sec{background:var(--navy)}
.btn.sec:hover{background:#13283F}
.btn.line{background:#fff;color:var(--navy);border:2px solid var(--navy)}
.btn.line:hover{background:var(--soft)}

/* ── QUIZ ─────────────────────────────────────────────── */
.quiz{display:grid;gap:1rem}
.qcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.2rem}
.qcard>p{font-weight:600;margin-top:0}
.answers{display:grid;gap:8px}
.answer{background:#fff;border:2px solid var(--line);border-radius:8px;padding:10px 12px;text-align:left;cursor:pointer;font-size:16.5px;color:var(--ink)}
.answer:hover:not(:disabled){border-color:var(--cyan)}
.answer.good{background:var(--green-bg);border-color:var(--green);font-weight:600}
.answer.bad{background:var(--red-bg);border-color:var(--red)}
.qfb{display:none;margin-top:.7rem;padding:.7rem .9rem;border-radius:8px;background:var(--soft);font-size:16px}
.qfb.show{display:block}
.qscore{font-weight:700;color:var(--navy);font-size:18px;margin-top:1rem}

/* ── LIENS RESSOURCES DU CHAPITRE ─────────────────────── */
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem}
.res-card{display:block;background:#fff;border:2px solid var(--line);border-radius:12px;padding:1.1rem 1.2rem;text-decoration:none;color:var(--ink);transition:.2s}
.res-card:hover{border-color:var(--orange);transform:translateY(-2px)}
.res-card .t{font-weight:800;color:var(--navy);font-size:17px}
.res-card .d{font-size:15px;color:var(--text2);margin-top:4px}
.res-card .k{display:inline-block;font-size:13.5px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;color:var(--orange-d);margin-bottom:4px}
.res-card.here{border-color:var(--cyan);background:var(--soft-cyan);pointer-events:none}

/* ── EXERCICES ────────────────────────────────────────── */
.ex-tools{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin:1.2rem 0}
.toc{display:flex;flex-wrap:wrap;gap:8px}
.toc a{background:#fff;border:1px solid var(--line);color:var(--navy);font-size:15px;font-weight:700;padding:6px 12px;border-radius:18px;text-decoration:none}
.toc a:hover{background:var(--soft-cyan);border-color:var(--cyan)}
.exo{background:#fff;border:1px solid var(--line);border-radius:12px;margin:1.6rem 0;overflow:hidden;box-shadow:var(--shadow);scroll-margin-top:calc(var(--pp-top) + 16px)}
.exo-head{background:#F1F5F9;padding:1rem 1.2rem;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center;border-bottom:1px solid var(--line)}
.exo-title{font:700 1.15rem/1.3 "Playfair Display",Georgia,serif;color:var(--navy)}
.exo-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.stars{color:var(--orange);letter-spacing:1px;font-size:16px}
.stars i{color:#C9D2DA;font-style:normal}
.comp{font-size:13.5px;font-weight:700;background:var(--soft-cyan);color:var(--cyan-d);padding:3px 10px;border-radius:12px}
.exo-body{padding:1.2rem 1.3rem}
.exo-body ol.q{padding-left:1.4rem}
.exo-body ol.q>li{margin:.5rem 0}
.lens-svg{max-width:100%;height:auto;display:block;background:#fff;border:1px solid var(--line);border-radius:10px;margin:.6rem auto}
.lewis-row{display:flex;flex-wrap:wrap;gap:1rem 1.4rem;align-items:flex-end;margin:.6rem 0}
.lewis-row figure{margin:0;text-align:center}
.lewis-row figcaption{font-size:14px;color:var(--text3);font-weight:600;margin-top:.25rem}
.lewis-svg{max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:4px;display:block}
.data{background:#F8FAFC;border:1px dashed #B8C6D3;border-radius:8px;padding:.7rem 1rem;margin:.8rem 0;font-size:16px}
.corr-btn{margin-top:1rem}
.corr{display:none;margin-top:1.1rem;border-top:3px solid var(--green);padding-top:.6rem}
.corr.open{display:block}
.corr>h4{color:var(--green);margin:.6rem 0 .3rem}
.cq{border:1px solid #CFE6D9;border-radius:10px;margin:1rem 0;overflow:hidden}
.cq-h{background:var(--green-bg);padding:.55rem 1rem;font-weight:800;color:var(--green)}
.cs{display:grid;grid-template-columns:170px minmax(0,1fr);border-top:1px solid #E3EFE8}
.cs:first-of-type{border-top:0}
.cs>.lbl{background:#FAFCFB;padding:.65rem .9rem;font-size:14.5px;font-weight:800;color:var(--text2);border-right:1px solid #E3EFE8}
.cs>.val{padding:.65rem 1rem;font-size:16.5px}
.cs>.val p{margin:.2rem 0}
.cs.res>.lbl{color:var(--green)}
.cs.res>.val{background:#F1FAF5}
.cs.err>.lbl{color:var(--orange-d)}
.calc-line{display:block;margin:.25rem 0;max-width:100%;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch}
.result{display:inline-block;background:#fff;border:2px solid var(--green);border-radius:8px;padding:.25rem .7rem;font-weight:700}

/* ── TP : progression, questions, grille ──────────────── */
.tp-bar{position:sticky;top:var(--pp-top);z-index:40;background:#fff;border-bottom:1px solid var(--line);padding:9px 12px}
.tp-bar-in{max-width:1000px;margin:auto;display:flex;align-items:center;gap:12px}
.tp-track{flex:1;height:9px;background:#E6EDF3;border-radius:6px;overflow:hidden}
.tp-fill{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--orange));transition:width .3s}
.tp-lbl{font-size:14.5px;font-weight:700;color:var(--navy);white-space:nowrap}
.tp-dots{display:flex;gap:6px;max-width:1000px;margin:7px auto 0;flex-wrap:wrap}
.tp-dot{width:12px;height:12px;border-radius:50%;background:#D3DCE4;border:0;padding:0;cursor:pointer}
.tp-dot.done{background:var(--cyan)}
.tp-dot.on{background:var(--orange);transform:scale(1.3)}
.tp-part{scroll-margin-top:calc(var(--pp-top) + 80px);margin:2.6rem 0}
.tp-ph{display:flex;gap:12px;align-items:center;margin-bottom:.9rem}
.tp-pn{width:42px;height:42px;border-radius:50%;background:#0E5C74;color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px;flex-shrink:0}
.tp-pt{font:700 1.35rem/1.25 "Playfair Display",Georgia,serif;color:var(--navy)}
.tp-pd{font-size:14.5px;color:var(--text3);font-weight:600}
.qb{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;margin:1rem 0;box-shadow:var(--shadow)}
.qb-h{display:flex;gap:10px;align-items:flex-start}
.qb-n{min-width:32px;height:32px;border-radius:8px;background:var(--soft-cyan);color:var(--cyan-d);display:grid;place-items:center;font-weight:800}
.qb-t{font-weight:700;color:var(--navy)}
textarea.ans{width:100%;min-height:80px;border:1px solid #B8C6D3;border-radius:8px;padding:.6rem .8rem;font-size:16.5px;margin-top:.6rem;resize:vertical}
.qb-act{display:flex;gap:8px;flex-wrap:wrap;margin-top:.6rem}
.fb{display:none;font-size:15px;font-weight:600;margin-top:.5rem;padding:7px 11px;border-radius:8px}
.fb.ok{display:block;background:var(--green-bg);color:var(--green)}
.fb.info{display:block;background:var(--soft-gold);color:var(--gold-d)}
.qcorr{display:none;margin-top:.8rem;background:#F4FAF7;border-left:4px solid var(--green);border-radius:0 8px 8px 0;padding:.8rem 1rem}
.qcorr.open{display:block}
.grille{width:100%;border-collapse:collapse;font-size:16px;margin:1rem 0}
.grille th{background:var(--ink);color:#fff;padding:8px}
.grille td{border:1px solid var(--line);padding:8px}
.grille td.c{font-weight:600}
.niv{width:34px;height:34px;border-radius:50%;border:2px solid #B8C6D3;background:#fff;cursor:pointer;font-weight:800;display:block;margin:auto;color:var(--text2)}
.niv.A{background:var(--green);border-color:var(--green);color:#fff}
.niv.B{background:var(--cyan-d);border-color:var(--cyan-d);color:#fff}
.niv.C{background:var(--gold);border-color:var(--gold);color:#fff}
.niv.D{background:var(--red);border-color:var(--red);color:#fff}
.origin{display:inline-block;font-size:13.5px;font-weight:800;text-transform:uppercase;letter-spacing:.4px;padding:3px 10px;border-radius:12px;background:#F3F0FB;color:var(--violet)}

/* ── CTA FIN DE PAGE ──────────────────────────────────── */
.cta-end{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border-radius:14px;padding:1.6rem;text-align:center;margin:2.4rem 0 1rem}
.cta-end b{color:#fff}
.cta-end .btn{margin:.4rem}

/* ── RESPONSIVE ───────────────────────────────────────── */
@media (max-width:760px){
  :root{--fs-body:17px;--fs-text:16px}
  .grid2,.grid3{grid-template-columns:minmax(0,1fr)}
  main.pp-main{padding:2rem 1rem 1.5rem}
  .pp-hero{padding:2.4rem 1rem 2.2rem}
  .cs{grid-template-columns:minmax(0,1fr)}
  .cs>.lbl{border-right:0;border-bottom:1px solid #E3EFE8;padding:.45rem .9rem}
  .exo-body{padding:1rem}
  .cs>.val{padding:.55rem .7rem}
  .formule{font-size:18px}
  .lab input[type=range]{width:130px}
}

/* ── IMPRESSION ───────────────────────────────────────── */
@media print{
  :root{--fs-body:12pt;--fs-text:11.5pt;--fs-table:11pt}
  body{background:#fff}
  .pp-cnav,.tp-bar,.btn,.corr-btn,.qb-act,textarea.ans,.ex-tools .btn,#pp-proj-btn,.lab .ctrls,.no-print,header,footer,.__pnav,.pp-py-bar{display:none!important}
  .pp-hero{background:#fff!important;color:var(--navy);padding:1rem 0;border-bottom:3px solid var(--navy)}
  .pp-hero *{color:var(--navy)!important}
  .pp-hero .wm{display:none}
  .card,.exo,.qb,.lab{box-shadow:none;break-inside:avoid}
  .lab{background:#fff;color:#000;border:1px solid #999}
  .lab canvas{background:#fff}
  .corr{display:none}
  body.print-corr .corr{display:block}
  .exo{break-inside:auto}
  a{color:#000;text-decoration:none}
}

/* bouton retour vers la liste des cours */
.pp-hero .home-btn{display:inline-flex;align-items:center;gap:6px;margin:1.1rem 14px 0 0;padding:9px 18px;background:#fff;color:#1E3A5F;border-radius:999px;font-weight:700;font-size:16px;text-decoration:none;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.pp-hero .home-btn:hover{background:#FFD9A8}
@media print{.pp-hero .home-btn{display:none}}

.qb .qb-cor:disabled{opacity:.45;cursor:not-allowed}

/* fiche professeur des TP */
.fiche-prof{margin:2rem 0 1.4rem;border:2px solid #1E3A5F;border-radius:14px;background:#F4F8FB;color:#14202B}
.fiche-prof summary{cursor:pointer;padding:14px 18px;font-weight:800;font-size:18px;color:#1E3A5F}
.fiche-prof .fp-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 22px;padding:0 18px 6px}
.fiche-prof h4{margin:.4rem 0 .3rem;color:#C2410C;font-size:16.5px}
.fiche-prof p{margin:.2rem 0 .5rem;font-size:16px;line-height:1.55}
.fiche-prof .small{padding:0 18px 12px}
@media (max-width:720px){.fiche-prof .fp-grid{grid-template-columns:minmax(0,1fr)}}

/* premiers pas guidés */
.premiers-pas{margin:1.6rem 0 2.2rem;padding:1.2rem 1.2rem .4rem;border:2px dashed #2A9D8F;border-radius:16px;background:#F2FBF9}
.premiers-pas .pp-h2{margin-top:0}
.exo.guide .steps-guide li{margin:.25rem 0}