/* Études de cas — gabarit cas-<slug>.html (build-cas.mjs), DA Home V5 · Impulsion.
   Ordre des sections repris de CaseStudyView.tsx du site. En-tête clair + nav forcée sombre (comme l'article),
   chiffres-clés en orange, corps 2 colonnes (sommaire collant), bande Résultats sombre texturée, autres cas, CTA.
   Typo : classes .t-* de base.css uniquement (aucune propriété de police ici). */

:root {
  --cs-orange: #e8520e;
  --cs-orange-dark: #ffb25c;
  --cs-orange-soft: #fff1e4;
  --cs-orange-line: #f6c9a4;
  --cs-warm: #f4f2ef;
  --cs-tex-quote: url(../augment/assets/bg-ambre.jpg);
  --cs-tex-results: url(../augment/assets/bg-ondule.jpg);
}
.cs-muted { color: var(--muted); }
.cs-dim { color: rgba(12, 12, 13, .45); }
.cs-accent { color: #b8430b; }
.cs-on-dark-muted { color: var(--on-dark-muted); }
.cs-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* La navigation reste sombre au-dessus de l'en-tête clair */
body:has(.cs-head) .nav { background-color: rgba(20, 17, 15, .96); border-bottom-color: rgba(255, 255, 255, .08); }

/* ---------- 01 · En-tête ---------- */
.cs-head { background: var(--surface); padding: 150px 0 72px; }
.cs-head__inner { display: flex; flex-direction: column; align-items: flex-start; }
.cs-crumbs { display: flex; flex-wrap: wrap; gap: 8px; color: #6b6359; }
.cs-crumbs a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.cs-crumbs [aria-current] { color: var(--ink); }
.cs-head__top { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 20px; margin-top: 32px; }
.cs-logo { width: auto; height: 52px; max-width: 160px; object-fit: contain; }
.cs-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.cs-pills li { padding: 6px 12px; border-radius: 999px; background: var(--cs-warm); }
.cs-pills li.is-accent { background: var(--cs-orange-soft); color: #b8430b; box-shadow: inset 0 0 0 1px var(--cs-orange-line); }
.cs-title { max-width: 1040px; margin-top: 28px; }
.cs-lead { max-width: 820px; margin-top: 24px; color: var(--muted); }
.cs-head__ctas { margin-top: 28px; }
.cs-cover { width: 100%; margin-top: 48px; }
.cs-cover__media { position: relative; aspect-ratio: 16 / 8; border-radius: 24px; overflow: hidden; background: #3a2616; }
.cs-cover__media > img, .cs-cover__media > video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cs-cover--top .cs-cover__media > img, .cs-cover--top .cs-cover__media > video { object-position: top; }

/* Chiffres-clés : le premier en orange */
.cs-stats { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); width: 100%; margin: 0; border-bottom: 1px solid var(--line); }
.cs-stat { display: flex; flex-direction: column; gap: 10px; padding: 32px 32px 32px 0; border-right: 1px solid var(--line); }
.cs-stat + .cs-stat { padding-left: 32px; }
.cs-stat:last-child { border-right: 0; }
.cs-stat dd { margin: 0; max-width: 30ch; }
.cs-stat__v { color: var(--ink); font-variant-numeric: tabular-nums; }
.cs-stat.is-key .cs-stat__v { color: var(--cs-orange); }
.cs-stat__note { display: block; opacity: .8; }

/* ---------- 02 · Corps ---------- */
.cs-body { background: var(--surface); padding: 24px 0 120px; }
.cs-body__grid { display: grid; grid-template-columns: 260px minmax(0, 760px); justify-content: space-between; gap: 64px; align-items: start; }
.cs-side { position: sticky; top: 112px; display: flex; flex-direction: column; gap: 36px; padding-top: 40px; }
.cs-side__k { margin-bottom: 14px; }
.cs-toc__list { position: relative; padding-left: 18px; }
.cs-toc__track { position: absolute; left: 0; top: 0; bottom: 0; width: 2px; border-radius: 2px; background: rgba(12, 12, 13, .08); overflow: hidden; }
.cs-toc__track span { position: absolute; inset: 0; background: var(--cs-orange); transform-origin: 50% 0; transform: scaleY(0); }
.cs-toc ol { display: flex; flex-direction: column; gap: 2px; }
.cs-toc a { display: block; padding: 6px 0; color: rgba(12, 12, 13, .55); transition: color .25s, transform .35s cubic-bezier(.2, .8, .2, 1); }
.cs-toc a:hover { color: var(--ink); }
.cs-toc a.is-active { color: var(--ink); transform: translateX(4px); }
.cs-toc a.is-active::before { content: ""; display: inline-block; width: 6px; height: 6px; margin: 0 8px 1px -2px; border-radius: 50%; background: var(--cs-orange); }
.cs-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.cs-tags li { padding: 5px 10px; border-radius: 999px; background: var(--cs-warm); }
.cs-meta { margin: 0; padding-top: 20px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; }
.cs-meta dd { margin: 4px 0 0; }
.cs-meta a { text-decoration: underline; text-decoration-color: rgba(12, 12, 13, .25); text-underline-offset: 3px; }
.cs-meta a:hover { text-decoration-color: var(--ink); }

.cs-text { min-width: 0; padding-top: 40px; display: flex; flex-direction: column; gap: 72px; }
.cs-part { display: flex; flex-direction: column; gap: 20px; }
.cs-h2 { scroll-margin-top: 120px; padding-top: 24px; border-top: 1px solid var(--line); }
.cs-eyebrow { color: #b8430b; margin-bottom: -4px; }
.cs-eyebrow + .cs-h2 { border-top: 0; padding-top: 0; }
.cs-part:has(.cs-eyebrow) { padding-top: 24px; border-top: 1px solid var(--line); }
.cs-intro { color: var(--ink); }
.cs-p { color: rgba(12, 12, 13, .72); }

/* Verbatim : carte sombre texturée */
.cs-quote { position: relative; isolation: isolate; overflow: hidden; padding: 44px 44px 36px; border-radius: 24px; background: var(--ink-2); color: #fff; }
.cs-quote::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--cs-tex-quote) center / cover no-repeat; opacity: .55; }
.cs-quote::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(115deg, rgba(20, 17, 15, .92) 30%, rgba(20, 17, 15, .45)); }
.cs-quote__mark { display: block; height: .5em; color: var(--cs-orange-dark); }
.cs-quote blockquote { margin: 16px 0 0; }
.cs-quote figcaption { display: flex; flex-direction: column; gap: 2px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line-dark); }
.cs-quote__role { color: var(--on-dark-muted); }

/* Enjeux */
.cs-enjeux { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 8px; }
.cs-enjeu { display: flex; flex-direction: column; gap: 10px; padding: 24px; border-radius: 16px; background: var(--cs-warm); }
.cs-enjeu:only-child, .cs-enjeux > .cs-enjeu:nth-child(3):last-child { grid-column: 1 / -1; }
.cs-enjeu__n { color: var(--cs-orange); }

/* Dispositif */
.cs-steps { display: flex; flex-direction: column; gap: 56px; margin-top: 16px; }
.cs-step { display: flex; flex-direction: column; gap: 12px; }
.cs-step__n { color: #b8430b; }
.cs-step__media { position: relative; aspect-ratio: 16 / 10; margin-top: 12px; border-radius: 16px; overflow: hidden; background: var(--cs-warm); }
.cs-step__media > img, .cs-step__media > video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cs-step__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.cs-step__cell { position: relative; aspect-ratio: 3 / 4; border-radius: 12px; overflow: hidden; background: var(--cs-warm); }
.cs-step__cell > img, .cs-step__cell > video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cs-note { padding: 20px 24px; border-radius: 14px; background: var(--cs-orange-soft); box-shadow: inset 0 0 0 1px var(--cs-orange-line); color: #7a2d07; }

/* Aujourd'hui */
.cs-today .t-lead:last-child { color: var(--cs-orange); }

/* Avant / Après */
.cs-compare { border-top: 1px solid var(--line); }
.cs-compare__head, .cs-compare__row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; padding-block: 16px; border-bottom: 1px solid var(--line); }
.cs-compare__row { padding-block: 20px; }
.cs-compare__before { color: rgba(12, 12, 13, .45); }
.cs-compare__after { color: var(--ink); padding-left: 20px; position: relative; }
.cs-compare__after::before { content: "→"; position: absolute; left: 0; color: var(--cs-orange); }

/* En image : maçonnerie à ratio naturel */
.cs-gallery { columns: 2; column-gap: 8px; }
.cs-gallery__item { break-inside: avoid; margin-bottom: 8px; border-radius: 14px; overflow: hidden; background: var(--cs-warm); }
.cs-gallery__item > img { width: 100%; height: auto; }
.cs-gallery__item > video { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

/* ---------- 03 · Résultats ---------- */
.cs-results { position: relative; isolation: isolate; overflow: hidden; scroll-margin-top: 72px; }
.cs-results::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--cs-tex-results) right center / cover no-repeat; opacity: .28; -webkit-mask-image: linear-gradient(90deg, transparent 20%, #000); mask-image: linear-gradient(90deg, transparent 20%, #000); }
.cs-results__head { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; max-width: 760px; }
.cs-results__eyebrow { color: var(--on-dark-muted); }
.cs-results__eyebrow::before { background: var(--cs-orange-dark); }
.cs-results__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 64px; border-top: 1px solid var(--line-dark); }
.cs-results__grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cs-results__grid--1 { grid-template-columns: minmax(0, 1fr); }
.cs-result { display: flex; flex-direction: column; gap: 12px; padding: 40px 40px 8px 0; }
.cs-result + .cs-result { padding-left: 40px; border-left: 1px solid var(--line-dark); }
.cs-result__v { color: var(--cs-orange-dark); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.cs-results__fresh { margin-top: 40px; }

/* ---------- 04 · Services mobilisés ---------- */
.cs-services__title { margin-top: 18px; max-width: 24ch; }
.cs-services__list { margin-top: 48px; border-top: 1px solid var(--line); }
.cs-service { display: grid; grid-template-columns: minmax(0, 30ch) minmax(0, 1fr) auto; align-items: baseline; gap: 12px 40px; padding-block: 26px; border-bottom: 1px solid var(--line); transition: padding .35s cubic-bezier(.2, .8, .2, 1); }
.cs-service__arrow { color: var(--cs-orange); transition: transform .3s cubic-bezier(.2, .8, .2, 1); }
.cs-local { margin-top: 32px; max-width: 64ch; }
.cs-inline { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
@media (hover: hover) {
  .cs-service:hover { padding-inline: 12px; }
  .cs-service:hover .cs-service__arrow { transform: translate(3px, -3px); }
}

/* ---------- 05 · Autres cas (cartes de la page Résultats) ---------- */
.cs-others { background: var(--paper); }
.cs-others__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 48px; }
.cs-others__head > div { display: flex; flex-direction: column; gap: 18px; }
.cs-others__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.cs-card { position: relative; display: flex; flex-direction: column; padding: 10px 10px 22px; border-radius: 24px; background: var(--surface); overflow: hidden; transition: transform .35s cubic-bezier(.2, .8, .2, 1), box-shadow .35s; }
.cs-card__photo { height: 240px; border-radius: 16px; overflow: hidden; background: #3a2616; }
.cs-card__photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2, .7, .2, 1); }
.cs-card__body { flex: 1; display: flex; flex-direction: column; gap: 14px; padding: 22px 14px 0; }
.cs-card__top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.cs-card__pill { flex: none; padding: 5px 10px; border-radius: 999px; background: var(--cs-warm); white-space: nowrap; }
.cs-card__metric { display: flex; align-items: baseline; gap: 12px; padding-block: 16px; border-block: 1px solid var(--line); }
.cs-card__big { flex: none; color: var(--cs-orange); font-variant-numeric: tabular-nums; }
.cs-card__foot { margin-top: auto; padding-top: 6px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.cs-card__read span[aria-hidden] { display: inline-block; transition: transform .3s cubic-bezier(.2, .8, .2, 1); }
.cs-card__read::after { content: ""; position: absolute; inset: 0; border-radius: 24px; }
.cs-card__read:focus-visible { outline: none; }
.cs-card:has(.cs-card__read:focus-visible) { outline: 2px solid #f28c28; outline-offset: 3px; }
@media (hover: hover) {
  .cs-card:hover { transform: translateY(-4px); box-shadow: 0 30px 60px -36px rgba(60, 25, 5, .45); }
  .cs-card:hover .cs-card__photo img { transform: scale(1.05); }
  .cs-card:hover .cs-card__read span[aria-hidden] { transform: translate(3px, -3px); }
}

/* ---------- Tablette ---------- */
@media (max-width: 1024px) {
  .cs-head { padding: 128px 0 56px; }
  .cs-cover__media { aspect-ratio: 16 / 9; }
  .cs-body { padding-bottom: 88px; }
  .cs-body__grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .cs-side { position: static; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 32px; }
  .cs-toc { display: none; }
  .cs-meta { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 24px; }
  .cs-side__block { grid-column: 1 / -1; }
  .cs-text { gap: 56px; }
  .cs-results__grid { grid-template-columns: minmax(0, 1fr) !important; }
  .cs-result, .cs-result + .cs-result { padding: 28px 0; border-left: 0; border-bottom: 1px solid var(--line-dark); }
  .cs-service { grid-template-columns: minmax(0, 1fr) auto; }
  .cs-service .t-body { grid-column: 1; }
  .cs-service__arrow { grid-column: 2; grid-row: 1; }
  .cs-others__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cs-others__grid > .cs-card:nth-child(3) { display: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  .cs-head { padding: 104px 0 40px; }
  .cs-head__top { margin-top: 24px; }
  .cs-logo { height: 40px; }
  .cs-title { margin-top: 20px; }
  .cs-lead { margin-top: 16px; }
  .cs-head__ctas { margin-top: 20px; }
  .cs-cover { margin-top: 28px; }
  .cs-cover__media { aspect-ratio: 4 / 3; border-radius: 18px; }
  .cs-stats { grid-auto-flow: row; grid-template-columns: minmax(0, 1fr); }
  .cs-stat, .cs-stat + .cs-stat { padding: 20px 0; border-right: 0; border-top: 1px solid var(--line); }
  .cs-stat:first-child { border-top: 0; }
  .cs-body { padding: 8px 0 64px; }
  .cs-side { grid-template-columns: minmax(0, 1fr); padding-top: 24px; }
  .cs-meta { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .cs-text { padding-top: 40px; gap: 48px; }
  .cs-quote { padding: 28px 22px 24px; border-radius: 20px; }
  .cs-enjeux { grid-template-columns: minmax(0, 1fr); }
  .cs-enjeu { padding: 20px 18px; }
  .cs-steps { gap: 40px; }
  .cs-step__media { border-radius: 14px; }
  .cs-compare__head { display: none; }
  .cs-compare__row { grid-template-columns: minmax(0, 1fr); gap: 6px; padding-block: 16px; }
  .cs-gallery { columns: 1; }
  .cs-results__grid { margin-top: 40px; }
  .cs-others__head { flex-direction: column; align-items: flex-start; gap: 20px; margin-bottom: 32px; }
  .cs-others__grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .cs-others__grid > .cs-card:nth-child(3) { display: flex; }
  .cs-card__photo { height: auto; aspect-ratio: 16 / 11; }
  .cs-card__body { padding: 18px 8px 0; }
  .cs-card__top { flex-wrap: wrap; }
  .cs-card__pill { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  .cs-card, .cs-card__photo img, .cs-service, .cs-service__arrow, .cs-toc a { transition: none !important; }
}