/* TP Spark — thème « cahier Seyès » : papier ligné, encre, étincelle orange */
:root {
  --papier: #fbfaf7;
  --papier-2: #ffffff;
  --encre: #16202e;
  --encre-2: #4a5568;
  --encre-3: #7b8597;
  --orange: #e25a1c;
  --orange-2: #c44a12;
  --orange-pale: #fde7da;
  --bleu-ligne: rgba(74, 128, 196, .13);
  --bleu-fort: rgba(74, 128, 196, .26);
  --marge: rgba(226, 90, 28, .35);
  --teal: #1f7a8c;
  --teal-pale: #dcf0f3;
  --violet: #7a4fb3;
  --violet-pale: #efe6fa;
  --gris-pale: #eef1f5;
  --code-bg: #16202e;
  --code-tete: #202c3d;
  --ombre: 0 1px 2px rgba(22, 32, 46, .06), 0 8px 24px rgba(22, 32, 46, .07);
  --rayon: 14px;
  --display: "Fraunces", "Cambria", Georgia, serif;
  --corps: "Atkinson Hyperlegible", "Calibri", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Courier New", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --papier: #111823;
    --papier-2: #172131;
    --encre: #e9edf3;
    --encre-2: #b3bdcc;
    --encre-3: #8591a4;
    --orange: #f07236;
    --orange-2: #ff8a52;
    --orange-pale: #3a2418;
    --bleu-ligne: rgba(120, 160, 220, .07);
    --bleu-fort: rgba(120, 160, 220, .13);
    --marge: rgba(240, 114, 54, .3);
    --teal: #5cc2d3;
    --teal-pale: #14343b;
    --violet: #b894ea;
    --violet-pale: #2c2140;
    --gris-pale: #1d2838;
    --code-bg: #0b1119;
    --code-tete: #151f2c;
    --ombre: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  font-family: var(--corps);
  font-size: 17px;
  line-height: 1.6;
  color: var(--encre);
  background-color: var(--papier);
  /* Le cahier Seyès : lignes fines tous les 8px, ligne forte tous les 32px, marge rouge */
  background-image:
    linear-gradient(90deg, transparent 0 calc(max(16px, 4vw) + 40px), var(--marge) calc(max(16px, 4vw) + 40px) calc(max(16px, 4vw) + 42px), transparent calc(max(16px, 4vw) + 42px)),
    repeating-linear-gradient(0deg, var(--bleu-fort) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(0deg, var(--bleu-ligne) 0 1px, transparent 1px 8px),
    repeating-linear-gradient(90deg, var(--bleu-ligne) 0 1px, transparent 1px 32px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--orange-2); }
code {
  font-family: var(--mono);
  font-size: .86em;
  background: var(--orange-pale);
  color: var(--encre);
  padding: .1em .35em;
  border-radius: 5px;
}
h1, h2, h3 { font-family: var(--display); line-height: 1.12; margin: 0; letter-spacing: -.01em; }

/* ---------------------------------------------------------------- Barre du haut */
.barre {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 18px;
  padding: 10px max(16px, 4vw);
  background: color-mix(in srgb, var(--papier) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--bleu-fort);
}
.logo {
  display: flex; align-items: center; gap: 9px; flex: none;
  font-family: var(--display); font-weight: 900; font-size: 20px;
  color: var(--encre); text-decoration: none;
}
.etincelle {
  width: 26px; height: 26px; border-radius: 50%; background: var(--orange); position: relative;
}
.etincelle::after {
  content: ""; position: absolute; inset: 6px 8px;
  background: #fff;
  clip-path: polygon(55% 0, 15% 58%, 45% 58%, 35% 100%, 88% 38%, 56% 38%);
}
.parties { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 0; }
.parties::-webkit-scrollbar { display: none; }
.chip {
  display: flex; align-items: center; gap: 7px; flex: none;
  padding: 5px 12px 5px 5px; border-radius: 99px;
  color: var(--encre-2); text-decoration: none; font-size: 14px;
  border: 1px solid transparent; transition: background .2s, border-color .2s;
}
.chip span {
  display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%;
  background: var(--gris-pale); color: var(--encre); font-weight: 700; font-size: 13px;
}
.chip em { font-style: normal; }
.chip:hover { border-color: var(--bleu-fort); background: var(--papier-2); }
.chip.actif { background: var(--papier-2); border-color: var(--orange); color: var(--encre); }
.chip.actif span, .chip.complet span { background: var(--orange); color: #fff; }
.lien-jupyter {
  flex: none; font-weight: 700; font-size: 14px; text-decoration: none; color: #fff;
  background: var(--orange); padding: 5px 12px; border-radius: 99px;
}
.lien-jupyter[hidden], .btn[hidden], .note[hidden] { display: none; }
.lien-fichiers {
  flex: none; font-weight: 700; font-size: 14px; text-decoration: none;
  color: var(--encre); border-bottom: 2px solid var(--orange);
}
@media (max-width: 1100px) { .chip em { display: none; } .chip { padding-right: 5px; } }

/* ---------------------------------------------------------------- Boutons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 700 16px var(--corps); padding: 12px 20px; border-radius: 99px; cursor: pointer;
  border: 2px solid var(--encre); background: transparent; color: var(--encre); text-decoration: none;
  transition: transform .15s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible, .chip:focus-visible, a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 3px solid var(--orange); outline-offset: 2px;
}
.btn.plein { background: var(--orange); border-color: var(--orange); color: #fff; }
.btn.plein:hover { background: var(--orange-2); border-color: var(--orange-2); }
.btn[disabled] { opacity: .35; cursor: default; transform: none; }

/* ---------------------------------------------------------------- Accueil */
.accueil { max-width: 1120px; margin: 0 auto; padding: 0 max(16px, 4vw) 60px calc(max(16px, 4vw) + 60px); }
@media (max-width: 700px) { .accueil { padding-left: max(16px, 4vw); } }
.hero { padding: 72px 0 56px; }
.surtitre {
  font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: .12em;
  color: var(--orange-2); margin: 0 0 14px;
}
.hero h1 { font-size: clamp(48px, 9vw, 104px); font-weight: 900; }
.hero h1 span { color: var(--orange); font-style: italic; font-weight: 500; }
.chapo { font-size: 20px; color: var(--encre-2); max-width: 640px; margin: 22px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.prerequis { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 8px 26px; color: var(--encre-2); font-size: 15px; }

.accueil section > h2 { font-size: 34px; margin-bottom: 22px; }
.mode-emploi, .plan, .telechargements { padding: 34px 0; }
.legende { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.legende > div { background: var(--papier-2); border-radius: var(--rayon); padding: 18px; box-shadow: var(--ombre); }
.legende p { margin: 10px 0 0; color: var(--encre-2); font-size: 15px; }
.note { color: var(--encre-3); font-size: 15px; margin-top: 16px; }

.cartes { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.carte-partie {
  position: relative; overflow: hidden; display: flex; flex-direction: column; gap: 8px;
  padding: 22px 22px 18px; min-height: 190px;
  background: var(--papier-2); border-radius: var(--rayon); box-shadow: var(--ombre);
  color: var(--encre); text-decoration: none;
  animation: monte .6s both cubic-bezier(.2, .7, .2, 1); animation-delay: calc(var(--i) * 70ms);
  transition: transform .2s, box-shadow .2s;
}
.carte-partie:hover { transform: translateY(-3px) rotate(-.3deg); }
.grand-num {
  position: absolute; right: 12px; top: -18px;
  font: 900 118px/1 var(--display); color: var(--orange); opacity: .14;
}
.carte-partie h3 { font-size: 24px; padding-right: 60px; }
.carte-partie p { margin: 0; color: var(--encre-2); font-size: 15px; flex: 1; }
.meta { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 12.5px; color: var(--encre-3); }
.meta .fait { color: var(--orange-2); font-weight: 600; }
.carte-partie.termine { outline: 2px solid var(--orange); }
@keyframes monte { from { opacity: 0; transform: translateY(14px); } }

.fichiers { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.fichier {
  display: grid; grid-template-columns: 58px 1fr auto; grid-template-rows: auto auto; column-gap: 14px;
  align-items: center; padding: 14px 16px; border-radius: var(--rayon);
  background: var(--papier-2); box-shadow: var(--ombre); color: var(--encre); text-decoration: none;
  transition: transform .15s;
}
.fichier:hover { transform: translateY(-2px); }
.fichier:hover .ext { background: var(--orange); color: #fff; }
.ext {
  grid-row: 1 / 3; display: grid; place-items: center; height: 58px; border-radius: 10px;
  font: 600 12px var(--mono); text-transform: uppercase; background: var(--orange-pale); color: var(--orange-2);
  transition: background .2s, color .2s;
}
.nom { font-weight: 700; word-break: break-word; }
.desc { grid-column: 2; font-size: 14px; color: var(--encre-2); line-height: 1.4; }
.poids { grid-row: 1; grid-column: 3; font: 12px var(--mono); color: var(--encre-3); }

/* ---------------------------------------------------------------- Page de partie */
.partie { max-width: 1240px; margin: 0 auto; padding: 0 max(16px, 4vw) 40px calc(max(16px, 4vw) + 60px); }
@media (max-width: 700px) { .partie { padding-left: max(16px, 4vw); } }
.partie-tete { padding: 44px 0 26px; }
.partie-tete h1 { font-size: clamp(38px, 6vw, 64px); font-weight: 900; }
.partie-tete .chapo { font-size: 18px; margin-top: 10px; }
.progression { display: flex; align-items: center; gap: 14px; margin-top: 22px; max-width: 560px; }
.jauge { flex: 1; height: 8px; border-radius: 99px; background: var(--gris-pale); overflow: hidden; }
.jauge i { display: block; height: 100%; width: 0; background: var(--orange); border-radius: inherit; transition: width .35s cubic-bezier(.2, .7, .2, 1); }
.compteur { font: 13px var(--mono); color: var(--encre-2); white-space: nowrap; }

.grille { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 34px; align-items: start; }
@media (max-width: 900px) { .grille { grid-template-columns: minmax(0, 1fr); gap: 14px; } }

.sommaire { position: sticky; top: 72px; }
.sommaire ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.sommaire a {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: 10px;
  color: var(--encre-2); text-decoration: none; font-size: 14.5px; line-height: 1.3;
}
.sommaire a:hover { background: var(--papier-2); }
.sommaire a.courant { background: var(--papier-2); color: var(--encre); box-shadow: var(--ombre); font-weight: 700; }
.pastille {
  flex: none; display: grid; place-items: center; min-width: 34px; height: 24px; border-radius: 99px;
  font: 600 11.5px var(--mono); background: var(--gris-pale); color: var(--encre-2);
}
.sommaire a.courant .pastille { background: var(--encre); color: var(--papier); }
.sommaire a.fait .pastille { background: var(--orange); color: #fff; }
.sommaire a.fait .pastille::before { content: "✓ "; }
.lib { flex: 1; }
.bonus-mini { color: var(--violet); }
.sommaire-bascule { display: none; }
@media (max-width: 900px) {
  .sommaire { position: static; }
  .sommaire-bascule {
    display: block; width: 100%; text-align: left; font: 700 15px var(--corps); color: var(--encre);
    background: var(--papier-2); border: 1px solid var(--bleu-fort); border-radius: 10px; padding: 10px 14px; cursor: pointer;
  }
  .sommaire-bascule::after { content: " ▾"; }
  .sommaire ol { display: none; margin-top: 8px; }
  .sommaire.ouvert ol { display: flex; }
}

/* ---------------------------------------------------------------- Étape */
.scene { min-width: 0; }
.etape {
  background: var(--papier-2); border-radius: 20px; box-shadow: var(--ombre);
  padding: clamp(20px, 4vw, 40px);
}
.js .etape { display: none; }
.js .etape.visible { display: block; animation: entre .35s both cubic-bezier(.2, .7, .2, 1); }
.js .etape.visible.retour { animation-name: entre-retour; }
@keyframes entre { from { opacity: 0; transform: translateX(22px); } }
@keyframes entre-retour { from { opacity: 0; transform: translateX(-22px); } }
.etape + .etape { margin-top: 20px; }
.js .etape + .etape { margin-top: 0; }

.etape-tete { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 18px; }
.etape-tete > div { min-width: 0; }
.etape h2 { overflow-wrap: anywhere; }
.num {
  flex: none; font: 900 clamp(40px, 6vw, 58px)/.9 var(--display); color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.etape h2 { font-size: clamp(24px, 3.4vw, 32px); margin-top: 8px; }
.badge {
  display: inline-block; font: 600 11.5px var(--mono); text-transform: uppercase; letter-spacing: .08em;
  padding: 3px 9px; border-radius: 99px; background: var(--gris-pale); color: var(--encre-2);
}
.type-guide .badge { background: var(--orange-pale); color: var(--orange-2); }
.type-exercice .badge { background: var(--teal-pale); color: var(--teal); }
.type-bonus .badge { background: var(--violet-pale); color: var(--violet); }

.texte { max-width: 70ch; }
.texte p { margin: 0 0 14px; }
.texte ul, .texte ol { margin: 0 0 14px; padding-left: 22px; }
.texte li { margin-bottom: 6px; }
.table-wrap { overflow-x: auto; margin: 4px 0 16px; }
table { border-collapse: collapse; font-size: 15px; min-width: 100%; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--gris-pale); vertical-align: top; }
th { font-weight: 700; background: var(--gris-pale); }
th:first-child { border-radius: 8px 0 0 8px; }
th:last-child { border-radius: 0 8px 8px 0; }

.code { margin: 18px 0 0; border-radius: 12px; overflow: hidden; background: var(--code-bg); }
.code figcaption {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 8px 10px 8px 16px; background: var(--code-tete); color: #c9d3e0; font-size: 13.5px;
}
.code figcaption::before {
  content: ""; flex: none; width: 9px; height: 9px; border-radius: 50%; background: var(--orange);
  box-shadow: 14px 0 0 #3b4a60, 28px 0 0 #3b4a60; margin-right: 34px;
}
.code figcaption { justify-content: flex-start; }
.copier {
  margin-left: auto; font: 600 12.5px var(--mono); color: #e6edf3; cursor: pointer;
  background: transparent; border: 1px solid #3b4a60; border-radius: 7px; padding: 4px 10px;
}
.copier:hover { border-color: var(--orange); }
.copier.ok { background: var(--orange); border-color: var(--orange); color: #fff; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; }
.code pre code, .code pre code.hljs {
  background: none; padding: 0; font-size: 14.5px; line-height: 1.6; color: #e6edf3; border-radius: 0;
}
.squelette figcaption::before { background: var(--teal); }

details { margin-top: 14px; border-radius: 12px; background: var(--gris-pale); }
details > summary {
  cursor: pointer; padding: 11px 16px; font-weight: 700; font-size: 15px; list-style: none;
  display: flex; align-items: center; gap: 10px;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: "+"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--papier-2); font-family: var(--mono); transition: transform .2s;
}
details[open] > summary::before { transform: rotate(45deg); }
details > div { padding: 0 16px 14px; }
details > div p:last-child { margin-bottom: 0; }
details.solution > summary { color: var(--teal); }
details.solution .code { margin: 0 12px 12px; }

.attendu {
  margin-top: 18px; border: 2px dashed var(--bleu-fort); border-radius: 12px; padding: 12px 16px;
}
.attendu span {
  display: block; font: 600 11.5px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--encre-3);
  margin-bottom: 6px;
}
.attendu pre { margin: 0; font: 14px/1.5 var(--mono); white-space: pre-wrap; word-break: break-word; }

.js .navigation { justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.navigation .fin { display: none; }
.navigation.derniere .suivant { display: none; }
.navigation.derniere .fin { display: block; }
.navigation { display: none; }
.js .navigation { display: flex; }
.clavier { font-size: 13.5px; color: var(--encre-3); text-align: right; margin: 12px 0 0; }
@media (max-width: 600px) { .clavier { display: none; } .navigation .btn { flex: 1; } }

.pied { text-align: center; padding: 30px 16px 40px; font-size: 13.5px; color: var(--encre-3); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (max-width: 600px) { .barre { gap: 10px; } .logo { font-size: 0; gap: 0; } .etape-tete { gap: 12px; } }