/* ============================================================
   Altus Conseil — design-system/sections/altus-section-article.css
   ------------------------------------------------------------
   Gabarit de page « actualité » (article long) : tête charbon,
   cover 21/9 à cheval sur la tête et le corps papier, corps en deux
   colonnes (article + sidebar collante). Ton « Architecture du calme ».
   Se BRANCHE sur la couche altus-motion (reveal-stagger, reveal,
   parallaxe, scroll-spy) ; ne ré-implémente aucun motion.

   La TÊTE et la SIDEBAR sont générées par le serveur (contrat figé).
   L'assistante ne rédige que l'intérieur de .altus-article (balises
   nues + vocabulaire riche ci-dessous) et les chiffres-clés.

   Class names — convention §00 (préfixe .altus-section-article) :
     .altus-section-article                                  <section>
       .altus-section-article-head        [theme dark]       <header> charbon + dégradé de chevauchement
         .altus-section-article-head-inner  (reveal-stagger, max 1080px)
           .altus-section-article-crumb                      <nav> fil d'Ariane, liens séparés par « / »
           .altus-section-article-meta                       <p>
             .altus-section-article-tag                      <span> étiquette (fond bronze, texte charbon)
             time[datetime]                                  date longue
             .altus-section-article-read                     <span> « Lecture 6 min »
           .altus-section-article-title                      <h1>
           .altus-section-article-chapo                      <p>
           .altus-section-article-byline                     <p> « Par <b>Josette Frigara</b>, Altus Conseil »
         .altus-section-article-cover       (reveal)         <figure> 21/9, max 1240px, à cheval
           img[data-altus-parallax]
       .altus-section-article-body        [theme light]      <div> grille minmax(0,1fr) 300px, gap 72px
         .altus-section-article-content .altus-article       <article> mesure 700px
         .altus-section-article-aside                        <aside>
           .altus-section-article-sticky                     <div> sticky top 110px, grid gap 20px
             .altus-article-card (.altus-article-card-facts)
               .altus-article-card-title
               .altus-article-fact > -fact-value (.is-accent) + -fact-label
             .altus-article-card.altus-article-card-toc      <nav data-altus-spy>
               .altus-article-card-title
               .altus-article-toc > li > a.altus-spy-link (.is-active)
             .altus-article-card.altus-article-card-cta
               .altus-article-card-cta-text + a.altus-btn.altus-btn-primary

   Vocabulaire éditorial dans .altus-article (préfixe .altus-article-) :
     p.altus-article-lead              lettrine bronze
     h2 (+ id) > span.altus-article-kicker
     h3, p, ul, ol, a, strong, em, blockquote
     figure.altus-article-figure > img + figcaption
     .altus-article-panel > -panel-title, -grid > -cell (.is-key) > -cell-num / -cell-title / -cell-text,
       -panel-sum, -strip > -strip-item (.is-on)[data-short], -strip-legend,
       -stats > -stat > -stat-label / -stat-value,
       -rows > -row (.is-key) > -row-label / -row-arrow / -row-value
     .altus-article-callout > -callout-eyebrow + -callout-text
     table.altus-article-table ; .altus-article-badge (.is-yes | .is-no | .is-maybe)
     ol.altus-article-steps > li > h3 + p
     .altus-article-faq > details > summary + p
     p.altus-article-sources

   RÈGLE BRONZE (long-form) — étiquette de thème, kickers, lettrine,
   liens, .is-active du sommaire et UN seul chiffre-clé .is-accent.
   Aucun autre bronze.

   Requiert : colors_and_type.css + altus-motion.css/.js + hero.css (.altus-btn).
   ============================================================ */

/* ─── Variables locales ────────────────────────────────────── */

.altus-section-article {
  --altus-article-card: #fff;
  --altus-article-line: color-mix(in srgb, var(--altus-fg1-inverse) 14%, transparent);
  --altus-article-overlap: 0.24;           /* part (0..1) de la cover qui reste sur le charbon */
  position: relative;
  font-family: var(--altus-font);
  font-weight: var(--altus-w-light);
  color: var(--altus-fg1-inverse);
  background: var(--altus-light);
}
.altus-section-article *, .altus-section-article *::before, .altus-section-article *::after { box-sizing: border-box; }

/* ─── Tête — charbon ───────────────────────────────────────── */

.altus-section-article-head {
  position: relative;
  color: var(--altus-fg1);
  /* Respiration sous le header fixé (156px au repos sur desktop) : jamais
     moins de 180px, 25vh sur les grands écrans, comme les autres têtes de page. */
  padding: clamp(180px, 25vh, 260px) 24px 0;
  background: var(--altus-bg);
  container-type: inline-size;
}
/* Pas de bonus :first-child ici : la tête porte déjà sa propre respiration
   sous le header fixé, comme les autres sections du site. */

.altus-section-article-head-inner {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
}

.altus-section-article-crumb {
  margin: 0 0 28px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--altus-fg2);
  display: flex;
  flex-wrap: wrap;
  gap: 0 10px;
}
.altus-section-article-crumb a {
  color: var(--altus-fg2);
  text-decoration: none;
  transition: color 200ms var(--altus-ease);
}
.altus-section-article-crumb a:hover { color: var(--altus-fg1); }
.altus-section-article-crumb a + a::before { content: '/'; margin-right: 10px; color: var(--altus-fg2); }

.altus-section-article-meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  font-size: 14px;
  color: var(--altus-fg2);
}
.altus-section-article-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: var(--altus-w-medium);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--altus-bg);
  background: var(--altus-accent);
  padding: 6px 12px;
}
.altus-section-article-read::before { content: '·'; margin-right: 14px; }

.altus-section-article-title {
  margin: 22px 0;
  font-size: clamp(34px, 5.2vw, 64px);
  font-weight: var(--altus-w-medium);
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 18ch;
  color: var(--altus-fg1);
  text-wrap: balance;
}
.altus-section-article-chapo {
  margin: 0 0 36px;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
  color: color-mix(in srgb, var(--altus-fg1) 82%, transparent);
  max-width: 62ch;
  text-wrap: pretty;
}
.altus-section-article-byline {
  margin: 0;
  padding-bottom: 48px;
  font-size: 14px;
  color: var(--altus-fg2);
}
.altus-section-article-byline b { color: var(--altus-fg1); font-weight: var(--altus-w-medium); }

/* Cover — figure = cadre (reveal) ; parallaxe sur l'img sur-cadrée.
   Chevauchement SANS marge négative : la figure reste en flux dans le
   header ; une bande papier (::after, calée en bas du header) remonte
   sous les 76 % inférieurs de la cover. Sa hauteur suit la largeur
   réelle de la cover via les unités de conteneur (cqw). */
.altus-section-article-cover {
  position: relative;
  margin: 0 auto;
  max-width: 1240px;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  isolation: isolate;
  z-index: 1;
}
.altus-section-article-cover img {
  position: absolute;
  inset: -6% 0;
  width: 100%;
  height: 112%;
  object-fit: cover;
  display: block;
  background: var(--altus-bg);
}
.altus-section-article-head::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: calc(min(100cqw - 48px, 1240px) * 9 / 21 * (1 - var(--altus-article-overlap)));
  background: var(--altus-light);
  z-index: 0;
}

/* ─── Corps — papier, deux colonnes ────────────────────────── */

.altus-section-article-body {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 72px;
  align-items: start;
  background: var(--altus-light);
}

.altus-section-article-content {
  min-width: 0;
  max-width: 700px;
}

/* ─── Sidebar ──────────────────────────────────────────────── */

.altus-section-article-aside { position: relative; min-width: 0; }
.altus-section-article-sticky {
  position: sticky;
  top: 110px;
  display: grid;
  gap: 20px;
}

.altus-article-card {
  background: var(--altus-article-card);
  border: 1px solid var(--altus-article-line);
  padding: 26px;
  color: var(--altus-fg1-inverse);
}
.altus-article-card-title {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: var(--altus-w-medium);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--altus-fg2-inverse);
}

.altus-article-fact {
  border-top: 1px solid var(--altus-article-line);
  padding: 14px 0;
}
.altus-article-fact:last-child { padding-bottom: 0; }
.altus-article-fact-value {
  display: block;
  font-size: 30px;
  font-weight: var(--altus-w-medium);
  line-height: 1.1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}
.altus-article-fact-value.is-accent { color: var(--altus-accent); }
.altus-article-fact-label {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--altus-fg2-inverse);
}

/* Sommaire — le conteneur sticky est le wrapper, pas le nav
   (neutralise le sticky par défaut de [data-altus-spy]). */
.altus-article-card.altus-article-card-toc { position: static; top: auto; }
.altus-article-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 15px;
}
.altus-article-toc li { border-top: 1px solid var(--altus-article-line); }
.altus-article-toc .altus-spy-link {
  display: block;
  padding: 10px 0;
  border-left: 0;
  color: var(--altus-fg1-inverse);
  text-decoration: none;
  transition: color 200ms var(--altus-ease);
}
.altus-article-toc .altus-spy-link:hover { color: var(--altus-accent); }
.altus-article-toc .altus-spy-link.is-active {
  color: var(--altus-accent);
  font-weight: var(--altus-w-medium);
}

.altus-article-card.altus-article-card-cta {
  background: var(--altus-bg);
  border-color: var(--altus-bg);
  color: var(--altus-fg1);
}
.altus-article-card-cta-text {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: var(--altus-w-medium);
  line-height: 1.4;
  text-wrap: pretty;
}

/* ─── Article — balises nues ───────────────────────────────── */

.altus-article {
  font-size: 18px;
  line-height: 1.7;
  font-weight: var(--altus-w-light);
  color: var(--altus-fg1-inverse);
  text-wrap: pretty;
}
.altus-article p { margin: 0 0 22px; }
.altus-article ul, .altus-article ol { margin: 0 0 22px; padding-left: 1.3em; }
.altus-article li { margin: 0 0 8px; }
.altus-article a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--altus-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 200ms var(--altus-ease);
}
.altus-article a:hover { color: var(--altus-accent); }
.altus-article strong, .altus-article b { font-weight: var(--altus-w-medium); }
.altus-article em { font-style: italic; }
.altus-article img { max-width: 100%; }

.altus-article h2 {
  margin: 64px 0 20px;
  font-size: clamp(26px, 3vw, 34px);
  font-weight: var(--altus-w-medium);
  line-height: 1.2;
  letter-spacing: -0.015em;
  scroll-margin-top: 110px;
  text-wrap: balance;
}
.altus-article-kicker {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: var(--altus-w-light);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--altus-accent);
}
.altus-article h3 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: var(--altus-w-medium);
  line-height: 1.3;
}

.altus-article-lead::first-letter {
  float: left;
  font-size: 74px;
  line-height: 0.9;
  padding: 6px 12px 0 0;
  font-weight: var(--altus-w-medium);
  color: var(--altus-accent);
}

.altus-article blockquote {
  margin: 32px 0;
  padding-left: 24px;
  border-left: 1px solid var(--altus-accent);
  font-size: 20px;
  line-height: 1.5;
}
.altus-article blockquote p:last-child { margin-bottom: 0; }

.altus-article-figure { margin: 40px 0; }
.altus-article-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.altus-article-figure figcaption {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--altus-article-line);
  font-size: 13px;
  line-height: 1.5;
  color: var(--altus-fg2-inverse);
}

/* ─── Panel « Schéma » ─────────────────────────────────────── */

.altus-article-panel {
  margin: 36px 0;
  padding: 32px;
  background: var(--altus-article-card);
  border: 1px solid var(--altus-article-line);
}
.altus-article-panel-title {
  margin: 0 0 20px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--altus-fg2-inverse);
}

.altus-article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.altus-article-cell {
  display: flex;
  flex-direction: column;
  padding: 22px 18px;
  background: var(--altus-light);
  border: 1px solid var(--altus-article-line);
}
.altus-article-cell-num {
  font-size: 30px;
  line-height: 1;
  color: var(--altus-fg2);
}
.altus-article-cell-title {
  display: block;
  margin: 18px 0 6px;
  font-size: 22px;
  font-weight: var(--altus-w-medium);
  line-height: 1.2;
}
.altus-article-cell-text {
  font-size: 15px;
  line-height: 1.4;
  color: var(--altus-fg2-inverse);
}
.altus-article-cell.is-key {
  background: var(--altus-bg);
  border-color: var(--altus-bg);
  color: var(--altus-fg1);
}
.altus-article-cell.is-key .altus-article-cell-title span { color: var(--altus-accent); }
.altus-article-cell.is-key .altus-article-cell-text { color: var(--altus-fg2); }
.altus-article-panel-sum {
  margin: 16px 0 0;
  text-align: center;
  font-size: 15px;
  color: var(--altus-fg2-inverse);
}

.altus-article-strip-legend {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--altus-fg2-inverse);
}
.altus-article-strip-legend b { color: var(--altus-fg1-inverse); font-weight: var(--altus-w-medium); }
.altus-article-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 5px;
}
.altus-article-strip-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 58px;
  border: 1px solid var(--altus-article-line);
  font-size: 15px;
  color: var(--altus-fg2-inverse);
  overflow: hidden;
}
.altus-article-strip-item.is-on {
  background: var(--altus-accent);
  border-color: var(--altus-accent);
  color: var(--altus-article-card);
  font-weight: var(--altus-w-medium);
}
.altus-article-strip + .altus-article-stats { margin-top: 24px; }

.altus-article-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--altus-article-line);
}
.altus-article-stat { padding: 18px 14px 0 0; min-width: 0; }
.altus-article-stat + .altus-article-stat { padding-left: 18px; border-left: 1px solid var(--altus-article-line); }
.altus-article-stat-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--altus-fg2-inverse);
}
.altus-article-stat-value {
  display: block;
  margin-top: 6px;
  font-size: 26px;
  font-weight: var(--altus-w-medium);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.altus-article-rows { display: grid; gap: 12px; }
.altus-article-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  background: var(--altus-light);
  border: 1px solid var(--altus-article-line);
}
.altus-article-row-label { font-size: 17px; line-height: 1.4; }
.altus-article-row-arrow { font-size: 22px; color: var(--altus-fg2); }
.altus-article-row-value {
  font-size: 24px;
  font-weight: var(--altus-w-medium);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.altus-article-row.is-key {
  background: var(--altus-bg);
  border-color: var(--altus-bg);
  color: var(--altus-fg1);
}
.altus-article-row.is-key .altus-article-row-value { color: var(--altus-accent); }

/* ─── Callout « À retenir » ────────────────────────────────── */

.altus-article-callout {
  margin: 40px 0;
  padding: 34px 36px;
  background: var(--altus-bg);
  color: var(--altus-fg1);
}
.altus-article-callout-eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--altus-accent);
}
.altus-article-callout-text {
  margin: 0;
  font-size: 24px;
  font-weight: var(--altus-w-medium);
  line-height: 1.35;
  color: var(--altus-fg1);
}

/* ─── Tableau ──────────────────────────────────────────────── */

.altus-article-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 16px;
}
.altus-article-table th {
  text-align: left;
  padding: 0 12px 12px 0;
  font-size: 12px;
  font-weight: var(--altus-w-medium);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--altus-fg2-inverse);
  border-bottom: 2px solid var(--altus-fg1-inverse);
}
.altus-article-table td {
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--altus-article-line);
  vertical-align: top;
  line-height: 1.45;
}
.altus-article-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: var(--altus-w-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1.4;
}
.altus-article-badge.is-yes   { background: var(--altus-bg); color: var(--altus-fg1); }
.altus-article-badge.is-no    { border: 1px solid var(--altus-fg2); color: var(--altus-fg2-inverse); }
.altus-article-badge.is-maybe { border: 1px solid var(--altus-accent); color: var(--altus-fg1-inverse); }

/* ─── Étapes ───────────────────────────────────────────────── */

.altus-article-steps {
  list-style: none;
  margin: 28px 0;
  padding: 0;
  counter-reset: altus-step;
}
.altus-article-steps > li {
  counter-increment: altus-step;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  margin: 0;
  border-top: 1px solid var(--altus-article-line);
}
.altus-article-steps > li::before {
  content: counter(altus-step, decimal-leading-zero);
  font-size: 28px;
  line-height: 1.1;
  color: var(--altus-accent);
  font-variant-numeric: tabular-nums;
}
.altus-article-steps > li > * { grid-column: 2; }
.altus-article-steps > li > h3 { grid-row: 1; }
.altus-article-steps > li p {
  margin: 0;
  font-size: 17px;
  color: var(--altus-fg2-inverse);
}

/* ─── FAQ ──────────────────────────────────────────────────── */

.altus-article-faq { margin: 28px 0; }
.altus-article-faq details {
  padding: 18px 0;
  border-top: 1px solid var(--altus-article-line);
}
.altus-article-faq details:last-child { border-bottom: 1px solid var(--altus-article-line); }
.altus-article-faq summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: var(--altus-w-medium);
  line-height: 1.4;
}
.altus-article-faq summary::-webkit-details-marker { display: none; }
.altus-article-faq summary::after {
  content: '+';
  flex: 0 0 auto;
  font-size: 24px;
  line-height: 1;
  color: var(--altus-accent);
}
.altus-article-faq details[open] summary::after { content: '–'; }
.altus-article-faq summary:focus-visible { outline: 1px solid var(--altus-fg2); outline-offset: 4px; }
.altus-article-faq details p {
  margin: 12px 0 0;
  font-size: 17px;
  color: var(--altus-fg2-inverse);
}

/* ─── Sources ──────────────────────────────────────────────── */

.altus-article-sources {
  margin: 48px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--altus-article-line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--altus-fg2-inverse);
}

/* ─── Responsive ───────────────────────────────────────────── */

@media (max-width: 960px) {
  .altus-section-article-body { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .altus-section-article-sticky { position: static; }
  .altus-section-article-cover { aspect-ratio: 16 / 10; }
  .altus-section-article-head::after {
    height: calc(min(100cqw - 48px, 1240px) * 10 / 16 * (1 - var(--altus-article-overlap)));
  }
}

@media (max-width: 560px) {
  .altus-section-article-head { padding-top: 140px; } /* header mobile : 116px */
  .altus-article { font-size: 17px; }
  .altus-article-panel { padding: 20px 16px; }
  .altus-article-grid { grid-template-columns: minmax(0, 1fr); }
  .altus-article-strip { gap: 3px; }
  .altus-article-strip-item { height: 44px; font-size: 0; }
  .altus-article-strip-item::after { content: attr(data-short); font-size: 14px; }
  .altus-article-strip-legend { flex-direction: column; gap: 4px; }
  .altus-article-stats { grid-template-columns: minmax(0, 1fr); }
  .altus-article-stat { padding: 14px 0; }
  .altus-article-stat + .altus-article-stat { padding-left: 0; border-left: 0; border-top: 1px solid var(--altus-article-line); }
  .altus-article-row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .altus-article-row-arrow { display: none; }
  .altus-article-row-value { text-align: left; }
  .altus-article-table thead { display: none; }
  .altus-article-table tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--altus-article-line); }
  .altus-article-table td { display: block; padding: 3px 0; border: 0; }
  .altus-article-callout { padding: 26px 22px; }
  .altus-article-card { padding: 22px 20px; }
}