@import url('https://fonts.googleapis.com/css2?family=Public+Sans:wght@400;500;600;700;800&display=swap');

:root{
  --bleu: #000091;
  --bleu-fonce: #00006b;
  --bleu-clair: #6a6af4;
  --rouge: #E1000F;
  --blanc: #FFFFFF;
  --creme: #f2f2f7;
  --encre: #1b1b3a;
  --gris-bord: rgba(255,255,255,.22);
  --ombre: rgba(0,0,10,.35);
  --radius: 10px;
  --bar-height: 92px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family:'Public Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bleu);
  color: var(--blanc);
  padding-bottom: calc(var(--bar-height) + 18px);
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; }

/* ---------- Header ---------- */
.site-header{
  padding: 28px 18px 20px;
  border-bottom: 1px solid var(--gris-bord);
}
.site-header h1{
  font-size: 2rem;
  line-height: 1.25;
  font-weight: 800;
  margin: 0 0 6px;
  max-width: 46ch;
}
.site-header p.accroche{
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: .95rem;
  max-width: 52ch;
}

/* ---------- Contexte (bloc Lecornu) ---------- */
.contexte{
  margin: 18px 18px 0;
  background: var(--bleu-fonce);
  border-left: 4px solid var(--rouge);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 16px 14px;
}
.contexte h2{
  font-size: .8rem;
  text-transform: none;
  letter-spacing: .01em;
  margin: 0 0 10px;
  font-weight: 700;
  color: rgba(255,255,255,.92);
}
.contexte ul{
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}
.contexte li{
  font-size: .88rem;
  color: rgba(255,255,255,.86);
  line-height: 1.4;
}

.intro-note {
  padding: 28px 18px 20px;
  font-size: .95rem;
  color: rgba(255,255,255,.78);
}

/* ---------- Chapitres ---------- */
main{ padding: 20px 18px 12px; display: grid; gap: 14px; }

.chapitre{
  background: var(--creme);
  color: var(--encre);
  border-radius: var(--radius);
  overflow: hidden;
}

.chapitre-entete{
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: transparent;
  border: none;
  color: inherit;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}
.chapitre-entete .titre-wrap{ flex: 1; min-width: 0; }
.chapitre-entete h3{
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}
.chapitre-entete .sous-total{
  display: block;
  margin-top: 3px;
  font-size: .8rem;
  font-weight: 600;
  color: #5a5a72;
}
.chapitre-entete .sous-total.actif{ color: var(--bleu); }
.chapitre-entete .chevron{
  flex-shrink: 0;
  width: 22px; height: 22px;
  display: grid; place-items: center;
  transition: transform .2s ease;
  color: var(--bleu);
}
.chapitre[data-ouvert="true"] .chevron{ transform: rotate(180deg); }

.chapitre-notes{
  margin: 0 16px 10px;
  padding: 10px 12px;
  background: #e4e4f4;
  border-radius: 6px;
  font-size: .82rem;
  color: #45455e;
}

.chapitre-corps{
  display: grid;
  gap: 1px;
  background: #e2e2ec;
  border-top: 1px solid #e2e2ec;
}
.chapitre[data-ouvert="false"] .chapitre-corps,
.chapitre[data-ouvert="false"] .chapitre-notes{ display: none; }

/* ---------- Mesure (ligne à cocher) ---------- */
.mesure{
  background: var(--blanc);
  padding: 13px 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.mesure label.case{
  flex-shrink: 0;
  position: relative;
  width: 22px; height: 22px;
  margin-top: 2px;
}
.mesure input[type="checkbox"]{
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: pointer;
}
.mesure .boite{
  width: 22px; height: 22px;
  border: 2px solid var(--rouge);
  border-radius: 5px;
  display: grid;
  place-items: center;
  background: var(--blanc);
  pointer-events: none;
}
.mesure input:checked + .boite{
  background: var(--rouge);
}
.mesure .boite svg{
  width: 13px; height: 13px;
  opacity: 0;
  transform: scale(.6);
  transition: opacity .12s ease, transform .12s ease;
}
.mesure input:checked + .boite svg{ opacity: 1; transform: scale(1); }
.mesure input:focus-visible + .boite{ outline: 2px solid var(--bleu); outline-offset: 2px; }

.mesure .contenu{ flex: 1; min-width: 0; }
.mesure .ligne-haut{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.mesure .libelle{
  font-size: .92rem;
  line-height: 1.35;
  font-weight: 500;
}
.mesure .note{
  margin-top: 4px;
  font-size: .78rem;
  color: #6b6b82;
  line-height: 1.3;
}
.mesure .bas{
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
}

.chip{
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-size: .78rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1.5px solid transparent;
  white-space: nowrap;
}
.chip{ color: #3a3a4d; background: #ececf2; border-color: #d9d9e4; }
.chip .type-libelle{ font-weight: 500; opacity: .8; font-size: .95em; }

.btn-info{
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1.5px solid #b9b9cf;
  background: var(--blanc);
  color: #55556e;
  display: grid;
  place-items: center;
  font-size: .72rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
}
.btn-info:hover{ border-color: var(--bleu); color: var(--bleu); }

/* ---------- Barre d'action (haut de la liste des chapitres) ---------- */
.barre-actions{
  display: flex;
  justify-content: flex-end;
  padding: 0 18px;
}
.btn-reset{
  background: none;
  border: none;
  color: rgba(255,255,255,.75);
  font-family: inherit;
  font-size: .82rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 6px 2px;
}
.btn-reset:hover{ color: var(--blanc); }

/* ---------- Bandeau sticky bas ---------- */
.bandeau{
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: var(--bleu-fonce);
  border-top: 2px solid var(--rouge);
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
  z-index: 40;
  box-shadow: 0 -6px 18px var(--ombre);
}
.bandeau-grille{
  display: grid;
  grid-template-columns: 1fr 1fr 1.15fr;
  gap: 8px;
  max-width: 720px;
  margin: 0 auto;
}
.bandeau-item{
  text-align: center;
  padding: 6px 4px;
  border-radius: 8px;
}
.bandeau-item .label{
  font-size: .66rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: rgba(255,255,255,.65);
  margin: 0 0 2px;
}
.bandeau-item .valeur{
  font-size: 1.05rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.bandeau-item.deficit .valeur{ font-size: 1.15rem; }
.valeur.bon{ color: #cfe2ff; }
.valeur.attention{ color: #ffd0d4; }
.bandeau-item .sous{
  font-size: .68rem;
  color: rgba(255,255,255,.6);
  margin-top: 1px;
}

/* ---------- FAQ ---------- */
.faq{
  padding: 4px 18px 0;
  display: grid;
  gap: 10px;
}
.faq h2{
  font-size: 1.1rem;
  font-weight: 800;
  margin: 10px 0 2px;
  color: var(--blanc);
}
.faq-item{
  background: var(--creme);
  color: var(--encre);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item summary{
  padding: 14px 16px;
  font-size: .92rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker{ display: none; }
.faq-item summary::after{
  content: "+";
  color: var(--bleu);
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.faq-item[open] summary::after{ content: "–"; }
.faq-item p{
  margin: 0;
  padding: 0 16px 14px;
  font-size: .88rem;
  line-height: 1.5;
  color: #33334d;
}
.faq-item p + p{ padding-top: 0; margin-top: -4px; }

/* ---------- Footer ---------- */
footer.site-footer{
  margin-top: 28px;
  padding: 22px 18px 26px;
  border-top: 1px solid var(--gris-bord);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: .82rem;
  color: rgba(255,255,255,.7);
}
footer.site-footer button, footer.site-footer a{
  background: none; border: none;
  font-family: inherit; font-size: inherit;
  color: rgba(255,255,255,.85);
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

/* ---------- Modale (source / mentions légales) ---------- */
.overlay{
  position: fixed; inset: 0;
  background: rgba(0,0,20,.55);
  display: none;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  padding: 0;
}
.overlay.ouvert{ display: flex; }
.modale{
  background: var(--blanc);
  color: var(--encre);
  width: 100%;
  max-width: 480px;
  border-radius: 16px 16px 0 0;
  padding: 22px 20px calc(24px + env(safe-area-inset-bottom, 0px));
  max-height: 78vh;
  overflow-y: auto;
}
.modale h4{
  margin: 0 0 10px;
  font-size: 1rem;
  padding-right: 30px;
}
.modale p{ margin: 0 0 8px; font-size: .9rem; line-height: 1.5; color: #33334d; }
.modale-tete{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.modale-fermer{
  border: none; background: #eeeef6; color: var(--encre);
  width: 30px; height: 30px; border-radius: 50%;
  font-size: 1rem; line-height: 1; cursor: pointer;
  flex-shrink: 0;
}

@media (min-width: 640px){
  .modale{ border-radius: 16px; margin-bottom: 40px; }
  .overlay{ align-items: center; }
}

@media (min-width: 760px){
  .site-header, .contexte, .intro-note, main, .faq, footer.site-footer{ max-width: 720px; margin-left: auto; margin-right: auto; }
  main{ padding-left: 0; padding-right: 0; }
  .contexte{ margin-left: auto; margin-right: auto; }
  .site-header h1{ font-size: 1.9rem; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .chevron{ transition: none; }
}