/* Études de cas V2 : même grammaire que l'accueil (base.css). Titre géant
   condensé, promesse en Bodoni italique, filets, un seul rouge. */

.page-cas main {
  padding-top: var(--header);
}

/* En-tête de l'étude */
.cas-tete {
  padding-top: clamp(28px, 4vw, 56px);
}
.cas-fil {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ligne);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.cas-activite {
  margin-top: clamp(40px, 6vw, 88px);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.cas-tete h1 {
  margin-top: 14px;
  font-family: var(--display);
  font-size: clamp(76px, 12.4vw, 224px);
  font-weight: 600;
  line-height: 0.84;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  text-wrap: balance;
  view-transition-name: titre-projet;
}
.cas-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 28px clamp(32px, 6vw, 96px);
  align-items: end;
  margin-top: clamp(28px, 4vw, 52px);
}
.cas-promesse {
  max-width: 18ch;
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 58px);
  font-style: italic;
  line-height: 1.08;
  letter-spacing: -0.01em;
}
.cas-resume p {
  max-width: 46ch;
  color: var(--encre-douce);
  font-size: 15px;
  line-height: 1.7;
}
.cas-lien {
  margin-top: 20px;
}
.cas-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(40px, 5vw, 72px);
  border-top: 1px solid var(--ligne-forte);
}
.cas-meta > div {
  display: grid;
  gap: 8px;
  padding: 18px 20px 0 0;
}
.cas-meta > div + div {
  padding-left: 20px;
  border-left: 1px solid var(--ligne);
}
.cas-meta dt {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.cas-meta dd {
  font-size: 15px;
  line-height: 1.45;
}
.cas-statut {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.cas-statut::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rouge);
}

/* Captures */
.cas-apercu {
  margin-top: clamp(48px, 6vw, 96px);
}
.cas-ecran {
  overflow: hidden;
  border: 1px solid #ffffff17;
  border-radius: 6px;
  background: var(--fond-bas);
  box-shadow: 0 60px 120px -60px #000;
}
.cas-ecran a {
  display: block;
}
.cas-ecran img {
  width: 100%;
  height: auto;
}
.cas-apercu figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}

/* Sections de récit */
.cas-contexte,
.cas-decisions,
.cas-bilan,
.cas-systeme {
  padding-top: var(--section);
}
.cas-contexte {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 32px clamp(40px, 7vw, 120px);
  align-items: start;
}
.cas-repere {
  position: sticky;
  top: calc(var(--header) + 32px);
}
.cas-repere h2,
.cas-section-tete h2,
.cas-bilan-tete h2,
.cas-systeme h2 {
  margin-top: 20px;
  font-family: var(--display);
  font-size: clamp(46px, 5.4vw, 92px);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.015em;
  text-transform: uppercase;
  text-wrap: balance;
}
.cas-texte {
  display: grid;
  gap: 22px;
  padding-top: 8px;
}
.cas-texte p {
  max-width: 34em;
  color: var(--encre-douce);
  font-size: clamp(17px, 1.35vw, 21px);
  line-height: 1.6;
}
.cas-texte p:first-child {
  color: var(--encre);
  font-size: clamp(21px, 1.9vw, 28px);
  font-weight: 460;
  line-height: 1.35;
  letter-spacing: -0.015em;
}
.cas-section-tete h2 {
  max-width: 14ch;
}
.cas-choix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: clamp(40px, 5vw, 72px);
  border-top: 1px solid var(--ligne-forte);
}
.cas-choix-item {
  position: relative;
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 28px 24px 32px 0;
}
.cas-choix-item + .cas-choix-item {
  padding-left: 24px;
  border-left: 1px solid var(--ligne);
}
.cas-choix-item::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto;
  height: 1px;
  background: var(--rouge);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 700ms var(--sortie);
}
@media (hover: hover) {
  .cas-choix-item:hover::before {
    transform: scaleX(1);
  }
}
.cas-numero {
  color: var(--rouge);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.cas-choix-item h3 {
  font-family: var(--display);
  font-size: clamp(28px, 2.4vw, 38px);
  font-weight: 600;
  line-height: 0.96;
  text-transform: uppercase;
}
.cas-choix-item p {
  color: var(--encre-douce);
  font-size: 15px;
  line-height: 1.65;
}

/* Galerie : téléphone et détail en relief */
.cas-galerie {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  padding-top: var(--section);
}
.cas-galerie figure {
  display: grid;
  gap: 14px;
}
.cas-galerie figcaption {
  color: var(--muted);
  font-size: 12px;
}
.cas-support {
  overflow: hidden;
  border: 1px solid #ffffff17;
  border-radius: 6px;
  background: var(--fond-bas);
  box-shadow: 0 50px 100px -50px #000;
}
.cas-mobile .cas-support {
  justify-self: center;
  width: min(100%, 330px);
  border: 6px solid #0a0a0b;
  border-radius: 34px;
  box-shadow:
    0 0 0 1px #ffffff1f,
    0 60px 100px -40px #000;
}
.cas-mobile figcaption {
  text-align: center;
}
.cas-support img {
  width: 100%;
}

/* Fonctionnement des applications */
.cas-systeme ol {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  margin-top: clamp(36px, 4vw, 60px);
  counter-reset: etape;
}
.cas-systeme li {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 24px 24px 26px 0;
  border-top: 1px solid var(--ligne-forte);
}
.cas-systeme li + li {
  padding-left: 24px;
}
.cas-systeme li + li::before {
  content: "";
  position: absolute;
  top: 30px;
  left: -5px;
  width: 9px;
  height: 9px;
  border-top: 1px solid var(--rouge);
  border-right: 1px solid var(--rouge);
  transform: rotate(45deg);
}
.cas-systeme li span {
  color: var(--rouge);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.cas-systeme li strong {
  font-family: var(--display);
  font-size: clamp(24px, 2vw, 32px);
  font-weight: 600;
  line-height: 1;
  text-transform: uppercase;
}

/* Bilan */
.cas-bilan {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px clamp(40px, 7vw, 120px);
  align-items: start;
}
.cas-livraison {
  display: grid;
  gap: 44px;
  padding-top: 8px;
}
.cas-livraison h3 {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.cas-livraison ul {
  display: grid;
  border-top: 1px solid var(--ligne);
}
.cas-livraison li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-bottom: 1px solid var(--ligne);
  font-size: 16px;
  line-height: 1.5;
}
.cas-livraison li::before {
  content: "";
  position: absolute;
  top: 1.45em;
  left: 0;
  width: 9px;
  height: 1px;
  background: var(--rouge);
}
.cas-etat p {
  max-width: 34em;
  color: var(--encre-douce);
  font-size: clamp(17px, 1.3vw, 20px);
  line-height: 1.6;
}
.cas-etat p + p {
  margin-top: 14px;
}

/* Projet relié et projet suivant */
.cas-projet-lie {
  padding-top: clamp(40px, 5vw, 72px);
}
.cas-suite {
  margin-top: var(--section);
}
.cas-suite a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  padding-block: clamp(32px, 4vw, 56px);
  border-block: 1px solid var(--ligne-forte);
}
.cas-suite h2 {
  margin-top: 18px;
  font-family: var(--display);
  font-size: clamp(60px, 8.6vw, 156px);
  font-weight: 600;
  line-height: 0.86;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  transition: transform 700ms var(--sortie);
}
.cas-suite p {
  margin-top: 16px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 20px;
  font-style: italic;
}
.cas-suite-action {
  margin-top: 28px;
}
@media (hover: hover) {
  .cas-suite a:hover h2 {
    transform: translateX(10px);
  }
}
.cas-suite-visuel {
  overflow: hidden;
  border: 1px solid #ffffff17;
  border-radius: 6px;
  aspect-ratio: 16 / 10;
}
.cas-suite-visuel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 0 0;
  transition: transform 1200ms var(--sortie);
}
@media (hover: hover) {
  .cas-suite a:hover .cas-suite-visuel img {
    transform: scale(1.04);
  }
}

/* Luméra : triptyque produit */
.lumera-artwork {
  padding-top: var(--section);
}
.lumera-triptych {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 1.6vw, 20px);
}
.lumera-triptych img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
}
.lumera-artwork figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}

/* Contact de fin d'étude */
.page-cas .contact {
  margin-top: var(--section);
}

@media (max-width: 1000px) {
  .cas-intro,
  .cas-contexte,
  .cas-bilan,
  .cas-galerie,
  .cas-suite a {
    grid-template-columns: minmax(0, 1fr);
  }
  .cas-repere {
    position: static;
  }
  .cas-mobile {
    order: 2;
  }
}
@media (max-width: 767px) {
  /* Le titre le plus long (« Transcrire ») tient en une ligne dès 320 px. */
  .cas-tete h1 {
    font-size: clamp(60px, 20vw, 140px);
  }
  .cas-promesse {
    font-size: clamp(30px, 8.6vw, 40px);
  }
  .cas-meta {
    grid-template-columns: minmax(0, 1fr);
  }
  .cas-meta > div,
  .cas-meta > div + div {
    padding: 14px 0;
    border-left: 0;
    border-bottom: 1px solid var(--ligne);
  }
  .cas-choix {
    grid-template-columns: minmax(0, 1fr);
  }
  .cas-choix-item,
  .cas-choix-item + .cas-choix-item {
    padding: 22px 0 24px;
    border-left: 0;
    border-top: 1px solid var(--ligne);
  }
  .cas-systeme li,
  .cas-systeme li + li {
    padding-left: 0;
  }
  .cas-systeme li + li::before {
    display: none;
  }
  .lumera-triptych {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .cas-ecran,
  .cas-suite-visuel {
    border-radius: 8px;
  }
  .cas-suite h2 {
    font-size: clamp(52px, 16vw, 96px);
  }
}