/* Feuille commune : en-tête, pages de lecture, accueil.
   Une seule teinte d'accent, celle des données (bleu pétrole) ; le rouge
   est réservé aux anomalies. Texte courant en IBM Plex Serif pour la
   lecture longue, interface en IBM Plex Sans. */

@font-face { font-family: "Plex"; src: url("vendor/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex"; src: url("vendor/fonts/ibm-plex-sans-latin-400-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Plex"; src: url("vendor/fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Plex"; src: url("vendor/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Plex Serif"; src: url("vendor/fonts/ibm-plex-serif-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Serif"; src: url("vendor/fonts/ibm-plex-serif-latin-400-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Plex Serif"; src: url("vendor/fonts/ibm-plex-serif-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --fond: #f3f4f2;
  --panneau: #fbfbfa;
  --blanc: #ffffff;
  --ligne: #d9dcd8;
  --ligne-forte: #b9beb9;
  --encre: #1f2a2c;
  --encre-2: #4b5759;
  --encre-3: #6f7a7c;
  --petrole: #206068;
  --petrole-clair: #e3eeec;
  --a1: #f0c05a;
  --a2: #e07a2c;
  --a3: #b8202e;
  --a4: #5e0b25;
  --rampe: linear-gradient(90deg, var(--a1), var(--a2) 35%, var(--a3) 70%, var(--a4));
  --rayon: 3px;
  --sans: "Plex", "Segoe UI", system-ui, sans-serif;
  --serif: "Plex Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 400 14px/1.5 var(--sans); color: var(--encre); background: var(--fond); font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased; }
:focus-visible { outline: 2px solid var(--petrole); outline-offset: 2px; }
[hidden] { display: none !important; }
a { color: var(--petrole); }
.discret { color: var(--encre-3); }

/* En-tête ------------------------------------------------------------------ */
.entete {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 22px;
  height: 52px; padding: 0 16px;
  background: var(--panneau); border-bottom: 1px solid var(--ligne);
}
.marque { display: flex; align-items: center; gap: 9px; color: var(--encre); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; white-space: nowrap; }
.marque svg { width: 20px; height: 20px; }
.nav-principale { display: flex; align-items: center; gap: 2px; flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.nav-principale a { color: var(--encre-2); text-decoration: none; padding: 6px 9px; border-radius: var(--rayon); white-space: nowrap; }
.nav-principale a:hover { color: var(--encre); background: var(--fond); }
.nav-principale a.actif { color: var(--encre); box-shadow: inset 0 -2px 0 var(--encre); border-radius: 0; }
.nav-sep { width: 1px; height: 18px; background: var(--ligne); margin: 0 6px; flex: none; }
.entete-actions { display: flex; gap: 8px; }
.menu-mobile { display: none; background: none; border: 0; padding: 6px; cursor: pointer; }
.menu-mobile svg { width: 22px; height: 22px; stroke: var(--encre); stroke-width: 1.7; fill: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 32px; padding: 0 13px; font: inherit; color: var(--encre); text-decoration: none;
  background: var(--panneau); border: 1px solid var(--ligne-forte); border-radius: var(--rayon);
  cursor: pointer; white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--blanc); border-color: var(--encre-3); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.plein { background: var(--encre); border-color: var(--encre); color: #fff; }
.btn.plein:hover:not(:disabled) { background: #33413f; }
.btn.grand { height: 40px; padding: 0 18px; font-size: 15px; }
.btn.petit { height: 26px; padding: 0 9px; font-size: 12.5px; }

/* Pages de lecture ----------------------------------------------------------- */
body.lecture { background: var(--blanc); }
.page { max-width: 1080px; margin: 0 auto; padding: 40px 32px 24px; }
.tete-page { max-width: 760px; }
.tete-page h1 { font: 600 34px/1.15 var(--sans); letter-spacing: -0.02em; margin: 0 0 14px; }
.intro { font: 400 18px/1.6 var(--serif); color: var(--encre-2); }
.intro p { margin: 0 0 10px; }

.onglets-page {
  position: sticky; top: 52px; z-index: 10;
  display: flex; gap: 4px; flex-wrap: wrap;
  margin: 26px 0 0; padding: 8px 0; background: var(--blanc); border-bottom: 1px solid var(--ligne);
}
.onglets-page a {
  padding: 6px 11px; border-radius: var(--rayon); text-decoration: none; color: var(--encre-2);
  border: 1px solid transparent; font-size: 13.5px;
}
.onglets-page a:hover { background: var(--fond); color: var(--encre); }
.onglets-page a.actif { background: var(--encre); color: #fff; }

.texte { max-width: 760px; font: 400 17px/1.68 var(--serif); padding-top: 22px; }
.texte h2 { font: 600 24px/1.25 var(--sans); letter-spacing: -0.015em; margin: 8px 0 16px; }
.texte h3, .texte h4 { font: 600 17px/1.3 var(--sans); margin: 28px 0 8px; }
.texte h5 { font: 600 15px/1.4 var(--sans); margin: 22px 0 4px; color: var(--encre); }
.texte p { margin: 0 0 14px; }
.texte ul, .texte ol { padding-left: 22px; margin: 0 0 14px; }
.texte li { margin-bottom: 6px; }
.texte strong { font-weight: 600; }
.texte code { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.86em; background: var(--fond); padding: 1px 4px; border-radius: 2px; }
.texte .math.display { display: block; overflow-x: auto; margin: 16px 0; }
.texte a.citation, .texte span.citation a { text-decoration: none; }

.texte figure { margin: 26px 0; }
.texte figure img { display: block; max-width: 100%; height: auto; border: 1px solid var(--ligne); background: #fff; }
.texte figcaption { font: 400 13.5px/1.5 var(--sans); color: var(--encre-2); margin-top: 8px; }
.texte figure.photo img { border: 0; }
.texte .credit { color: var(--encre-3); }
@media (min-width: 1100px) { .texte figure.photo { margin-right: -160px; } }
.texte figure img[src*="figures/e"] { max-width: 640px; width: 100%; }

.texte table { border-collapse: collapse; width: 100%; font: 400 13.5px/1.45 var(--sans); margin: 18px 0 22px; display: block; overflow-x: auto; }
.texte table caption { caption-side: top; text-align: left; color: var(--encre-2); padding-bottom: 6px; }
.texte th { text-align: left; font-weight: 600; border-bottom: 1px solid var(--encre-3); padding: 6px 10px 6px 0; }
.texte td { border-bottom: 1px solid var(--ligne); padding: 6px 10px 6px 0; vertical-align: top; }

.suite { display: flex; justify-content: space-between; gap: 16px; margin: 36px 0 8px; padding-top: 16px; border-top: 1px solid var(--ligne); font: 400 14px/1.4 var(--sans); }
.suite a { text-decoration: none; }

.refs { margin: 32px 0 10px; font: 400 14px/1.5 var(--sans); border-top: 1px solid var(--ligne); padding-top: 12px; }
.refs summary { cursor: pointer; color: var(--encre-2); }
.refs .csl-entry, .biblio .csl-entry { margin: 8px 0; padding-left: 1.6em; text-indent: -1.6em; }
.biblio { font: 400 15px/1.55 var(--sans); }

/* Guide du code */
.code-ref { font: 400 12.5px/1.4 var(--sans); color: var(--encre-3); margin: 18px 0 4px; }
.texte div.sourceCode { margin: 0 0 18px; }
.texte pre { font: 400 12.8px/1.5 ui-monospace, "Cascadia Mono", Consolas, monospace; background: #f6f7f5; border: 1px solid var(--ligne); border-radius: var(--rayon); padding: 12px 14px; overflow-x: auto; margin: 0 0 18px; }
@media (min-width: 1100px) { .texte div.sourceCode { margin-right: -260px; } }
.texte div.sourceCode pre { margin: 0; }
.texte pre code { background: none; padding: 0; font-size: inherit; }
code span.kw, code span.cf { color: #1f5f8b; font-weight: 600; }
code span.st, code span.dv, code span.fl { color: #7a4a00; }
code span.co { color: #6a737d; font-style: italic; }
code span.fu { color: #206068; }
code span.bu { color: #5a3e8a; }

.pied { max-width: 1080px; margin: 30px auto 0; padding: 18px 32px 32px; color: var(--encre-3); font-size: 13px; border-top: 1px solid var(--ligne); }

/* Accueil ------------------------------------------------------------------ */
.page.large { max-width: 1180px; }
.une { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; padding: 20px 0 40px; }
.une h1 { font: 600 42px/1.1 var(--sans); letter-spacing: -0.025em; margin: 0 0 18px; }
.une-texte p { font: 400 18px/1.6 var(--serif); color: var(--encre-2); margin: 0 0 14px; }
.une-texte p.discret { font: 400 14px/1.5 var(--sans); }
.une-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.une-carte { margin: 0; }
.une-carte img { width: 100%; height: auto; display: block; }
.une-carte figcaption { font-size: 13px; color: var(--encre-3); margin-top: 8px; }

.bande-etapes { border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); padding: 28px 0 30px; }
.bande-etapes h2, .deux-col h2 { font: 600 20px/1.3 var(--sans); margin: 0 0 16px; }
.etapes-une { list-style: none; counter-reset: e; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.etapes-une li { counter-increment: e; font: 400 15.5px/1.55 var(--serif); color: var(--encre-2); }
.etapes-une li::before { content: counter(e); display: block; font: 600 13px var(--sans); color: var(--petrole); margin-bottom: 6px; }
.etapes-une b { display: block; font: 600 15px/1.4 var(--sans); color: var(--encre); margin-bottom: 4px; }
.deux-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; padding: 34px 0 10px; }
.chiffres-une { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.chiffres-une td { padding: 9px 0; border-bottom: 1px solid var(--ligne); vertical-align: top; }
.chiffres-une td + td { text-align: right; font-weight: 600; white-space: nowrap; padding-left: 16px; }
.sommaire { margin: 0; }
.sommaire dt { font-weight: 600; margin-top: 10px; }
.sommaire dt a { text-decoration: none; }
.sommaire dd { margin: 2px 0 0; color: var(--encre-2); font: 400 15px/1.5 var(--serif); }

@media (max-width: 1150px) {
  .nav-principale { display: none; }
  .menu-mobile { display: block; margin-left: auto; }
  body.menu-ouvert .nav-principale { display: flex; flex-direction: column; align-items: stretch; position: absolute; top: 52px; left: 0; right: 0; background: var(--panneau); border-bottom: 1px solid var(--ligne); padding: 8px 16px; }
  body.menu-ouvert .nav-sep { display: none; }
}
@media (max-width: 860px) {
  .une, .deux-col { grid-template-columns: 1fr; gap: 28px; }
  .etapes-une { grid-template-columns: 1fr 1fr; }
  .page { padding: 24px 16px; }
  .une h1 { font-size: 32px; }
  .tete-page h1 { font-size: 28px; }
  .entete-actions .btn:not(.plein) { display: none; }
}
@media (max-width: 520px) { .etapes-une { grid-template-columns: 1fr; } .marque span { display: none; } }