:root {
  --nuit: #16293A;
  --nuit-2: #20374C;
  --vert: #81A61B;
  --vert-fonce: #5F7A14;
  --vert-clair: #A9C94A;
  --page: #FBFBF8;
  --pale: #F2F6E8;
  --blanc: #FFFFFF;
  --texte-2: #3D4C5C;
  --filet: #E3E8D8;
  --sur-nuit: #D5DEE6;

  --serif: 'Source Serif 4', Georgia, serif;
  --sans: 'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;

  --gouttiere: clamp(16px, 5vw, 64px);
  --largeur: 1152px;

  /* Créneaux : proportions du sommet de la tour du logo (merlon 6,2 / créneau 3,8 / hauteur 6,5), x4 */
  --merlon: 62px;
  --pas: 100px;
  --creneau-h: 65px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--page);
  color: var(--nuit);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

button { font: inherit; }

a { color: var(--vert-fonce); text-underline-offset: 3px; }
a:hover { color: var(--nuit); }

:focus-visible {
  outline: 3px solid var(--vert);
  outline-offset: 3px;
  border-radius: 2px;
}

.evitement {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 10;
  padding: 10px 16px;
  background: var(--blanc);
  color: var(--nuit);
  font-weight: 700;
}
.evitement:focus { top: 16px; }

.cadre {
  width: 100%;
  max-width: calc(var(--largeur) + 2 * var(--gouttiere));
  margin: 0 auto;
  padding: 0 var(--gouttiere);
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  max-width: 26ch;
}

h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

p { margin: 0; }

.chapeau {
  font-size: clamp(19px, 1.6vw, 22px);
  line-height: 1.55;
  color: var(--texte-2);
  max-width: 62ch;
}

/* Boutons */
.bouton {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 26px;
  border-radius: 6px;
  border: 2px solid transparent;
  font-weight: 700;
  font-size: 17px;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.bouton--vert { background: var(--vert); color: var(--nuit); }
.bouton--vert:hover { background: var(--vert-clair); color: var(--nuit); }
.bouton--nuit { background: var(--nuit); color: var(--blanc); }
.bouton--nuit:hover { background: var(--nuit-2); color: var(--blanc); }
.bouton--contour { border-color: currentColor; color: var(--blanc); }
.bouton--contour:hover { background: var(--blanc); border-color: var(--blanc); color: var(--nuit); }

/* Bandeau Darkmira Service */
.bandeau {
  display: block;
  padding: 12px var(--gouttiere);
  background: var(--vert);
  color: var(--nuit);
  font-size: 16px;
  line-height: 1.45;
  text-align: center;
  text-decoration: none;
}
.bandeau:hover { background: var(--vert-clair); color: var(--nuit); }
.bandeau span { text-decoration: underline; text-underline-offset: 3px; }

/* En-tête et hero : le rempart */
.rempart {
  position: relative;
  overflow: hidden;
  background: var(--nuit);
  color: var(--blanc);
}

.rempart::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  height: var(--creneau-h);
  background: linear-gradient(to right, var(--page) 0 var(--merlon), transparent var(--merlon) var(--pas)) 0 0 / var(--pas) 100% repeat-x;
}

.entete {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 88px;
}

.entete__logo { color: var(--blanc); }
.entete__logo svg { width: 170px; height: auto; }

.entete nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 17px;
  font-weight: 600;
}
.entete nav a:not(.bouton) { color: var(--blanc); text-decoration: none; }
.entete nav a:not(.bouton):hover { color: var(--vert-clair); }
.entete .bouton { min-height: 44px; padding: 8px 18px; font-size: 16px; }

.hero {
  position: relative;
  z-index: 2;
  padding-top: clamp(72px, 10vw, 128px);
  padding-bottom: calc(clamp(88px, 11vw, 144px) + var(--creneau-h));
}

.hero h1 {
  font-size: clamp(42px, 6.4vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.hero .chapeau {
  margin-top: 28px;
  color: var(--sur-nuit);
  max-width: 54ch;
}

.hero__tour {
  position: absolute;
  z-index: 1;
  right: max(-120px, calc((100vw - var(--largeur)) / 2 - 220px));
  bottom: calc(var(--creneau-h) - 150px);
  width: clamp(420px, 52vw, 760px);
  height: auto;
  pointer-events: none;
}
.hero__tour .t { fill: var(--nuit-2); }
.hero__tour .m { fill: var(--vert); }

/* Sections */
.section { padding: clamp(72px, 9vw, 120px) 0; }

.charte__tete {
  display: grid;
  gap: 18px;
  margin-bottom: clamp(40px, 5vw, 64px);
}

.esprits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.esprits li {
  padding-top: 24px;
  border-top: 3px solid var(--vert);
}

.esprits h3 {
  font-size: 25px;
  line-height: 1.2;
  margin-bottom: 10px;
}

.esprits p { color: var(--texte-2); }

.offre {
  background: var(--nuit);
  color: var(--blanc);
}

.offre .cadre {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  align-items: end;
  gap: 48px;
}

.offre__nom {
  margin-bottom: 14px;
  color: var(--vert-clair);
  font-weight: 700;
  font-size: 18px;
}

.offre h2 { max-width: 24ch; }

.offre p.chapeau {
  margin-top: 18px;
  color: var(--sur-nuit);
}

.offre__action { justify-self: end; }

.contact { background: var(--pale); }

.contact .cadre {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px 48px;
}

/* Pied de page */
.pied {
  padding: 48px 0;
  background: var(--nuit);
  color: #C9D3DD;
  font-size: 16px;
}

.pied .cadre {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px 48px;
}

.pied__nom {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--blanc);
}

.pied nav { display: flex; flex-wrap: wrap; gap: 12px 28px; }
.pied a { color: #C9D3DD; text-decoration: none; }
.pied a:hover { color: var(--blanc); text-decoration: underline; }


@media (max-width: 900px) {
  .esprits { grid-template-columns: 1fr; }
  .offre .cadre { grid-template-columns: 1fr; align-items: start; }
  .offre__action { justify-self: start; }
  .hero__tour { opacity: .55; }
}

@media (max-width: 600px) {
  body { font-size: 17px; }
  .entete { flex-wrap: wrap; padding-top: 16px; padding-bottom: 16px; }
  .entete nav { gap: 20px; width: 100%; justify-content: space-between; }
  .entete__logo svg { width: 140px; }
  .hero__tour { right: -140px; width: 380px; opacity: .4; }
  .bouton { width: 100%; justify-content: center; }
  .entete .bouton { width: auto; }
  :root { --merlon: 31px; --pas: 50px; --creneau-h: 33px; }
}

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

/* Darkmira Service */
.entete__logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.entete__logo svg { width: 48px; }
.entete__logo .t { fill: var(--blanc); }
.entete__logo .m { fill: var(--vert); }
.marque { display: grid; gap: 2px; line-height: 1; }
.marque strong { font-family: var(--serif); font-size: 22px; font-weight: 600; color: var(--blanc); }
.marque span { font-size: 13px; color: #A9B8C6; }

.hero--service h1 {
  font-size: clamp(30px, 3.9vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  max-width: 34ch;
}
.signature {
  margin-top: 28px;
  font-size: clamp(20px, 1.8vw, 24px);
  font-weight: 700;
  color: var(--vert-clair);
}
.actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

.deux-colonnes {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  gap: clamp(32px, 5vw, 72px);
}
.deux-colonnes > div { display: grid; gap: 22px; }
.deux-colonnes p { color: var(--texte-2); max-width: 64ch; }
.deux-colonnes p.encadre {
  margin-top: 8px;
  padding: 28px 32px;
  background: var(--pale);
  border-left: 4px solid var(--vert);
  font-family: var(--serif);
  font-size: clamp(21px, 2vw, 25px);
  font-weight: 500;
  line-height: 1.4;
  color: var(--nuit);
}

.blanc { background: var(--blanc); border-top: 1px solid var(--filet); border-bottom: 1px solid var(--filet); }

.tete { display: grid; gap: 18px; margin-bottom: clamp(40px, 5vw, 64px); }

.hero__tour--discret {
  width: clamp(300px, 30vw, 440px);
  right: max(-90px, calc((100vw - var(--largeur)) / 2 - 140px));
  bottom: calc(var(--creneau-h) - 90px);
}
@media (max-width: 1100px) { .hero__tour--discret { display: none; } }

/* Méthode : frise en trois temps */
.frise {
  --frise-gap: clamp(24px, 3vw, 48px);
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--frise-gap);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: temps;
}
/* Un trait relie chaque étape à la suivante, et s'arrête à la dernière */
.frise li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 23px;
  left: 60px;
  right: calc(12px - var(--frise-gap));
  height: 2px;
  background: var(--filet);
}
.frise li { position: relative; counter-increment: temps; }
.frise li::before {
  content: counter(temps);
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  border-radius: 50%;
  background: var(--nuit);
  color: var(--blanc);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  box-shadow: 0 0 0 8px var(--blanc);
}
.frise h3 { font-size: 24px; line-height: 1.25; margin-bottom: 10px; }
.frise p { color: var(--texte-2); }
.apres-frise {
  margin-top: clamp(40px, 5vw, 64px);
  padding-left: 24px;
  border-left: 4px solid var(--vert);
  color: var(--nuit);
}

.usages {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.usages li { padding-top: 24px; border-top: 3px solid var(--vert); }
.usages h3 { font-size: 25px; line-height: 1.2; margin-bottom: 10px; }
.usages p { color: var(--texte-2); }

/* Garantie */
.garantie { background: var(--nuit); color: var(--blanc); }
.garantie .garantie__nom {
  max-width: none;
  margin-bottom: 18px;
  color: var(--vert-clair);
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0;
}
.garantie blockquote {
  margin: 0;
  max-width: 24ch;
  font-family: var(--serif);
  font-size: clamp(32px, 4.4vw, 54px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.garantie p.chapeau { margin-top: 28px; color: var(--sur-nuit); }

/* Qui valide : trois options, une seule par projet */
.valideurs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}
.valideurs li {
  display: grid;
  grid-row: span 2;
  grid-template-rows: subgrid;
  row-gap: 14px;
  padding: 4px clamp(20px, 3vw, 40px);
}
.valideurs li:first-child { padding-left: 0; }
.valideurs li + li { border-left: 1px solid var(--filet); }
.valideurs__si { color: var(--texte-2); font-size: 17px; }
.valideurs__alors {
  font-family: var(--serif);
  font-size: clamp(22px, 2.1vw, 26px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--nuit);
}

.darkmira { background: var(--pale); }
.darkmira .cadre { display: grid; gap: 18px; }
.darkmira p.chapeau { color: var(--nuit); }
.darkmira a { font-weight: 700; font-size: 18px; }

.contact .cadre { display: grid; justify-content: start; gap: 18px; }
.contact .chapeau { margin-bottom: 14px; }
.contact__adresse { color: var(--texte-2); }

.pied .cadre { align-items: center; }
.pied a.fort { color: var(--blanc); font-weight: 700; text-decoration: underline; }

@media (max-width: 900px) {
  .deux-colonnes, .usages { grid-template-columns: 1fr; }
  .frise { grid-template-columns: 1fr; --frise-gap: 40px; }
  .frise li:not(:last-child)::after { top: 60px; bottom: calc(12px - var(--frise-gap)); left: 23px; right: auto; width: 2px; height: auto; }
  .frise li { padding-left: 72px; }
  .frise li::before { position: absolute; left: 0; top: 0; margin: 0; }
  .valideurs { grid-template-columns: 1fr; }
  .valideurs li { padding: 24px 0; }
  .valideurs li + li { border-left: 0; border-top: 1px solid var(--filet); }
}

@media (max-width: 600px) {
  .entete nav a:not(.bouton) { display: none; }
  .entete nav { width: auto; }
  .entete { flex-wrap: nowrap; }
  .marque span { display: none; }
  .marque strong { font-size: 19px; }
  .entete nav { display: none; }
}

/* Diagnostic */
[hidden] { display: none !important; }

.diag { max-width: 760px; }

.diag__progression {
  height: 6px;
  border-radius: 3px;
  background: var(--filet);
  overflow: hidden;
}
.diag__progression span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--vert);
  transition: width .25s ease;
}

.diag__etape { margin: 14px 0 22px; color: var(--texte-2); font-size: 16px; font-weight: 600; }

.diag fieldset { margin: 0; padding: 0; border: 0; display: grid; gap: 12px; }
.diag legend {
  margin-bottom: 18px;
  padding: 0;
  font-family: var(--serif);
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  line-height: 1.2;
}
.diag legend:focus { outline: none; }
.diag legend:focus-visible { outline: 3px solid var(--vert); outline-offset: 4px; }

.choix {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 56px;
  padding: 14px 18px;
  border: 2px solid var(--filet);
  border-radius: 8px;
  background: var(--page);
  font-size: 18px;
  line-height: 1.35;
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease;
}
.choix:hover { border-color: #B8C4A0; }
.choix input {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--vert-fonce);
}
.choix:has(input:checked) { border-color: var(--vert); background: var(--pale); }
.choix:has(input:focus-visible) { outline: 3px solid var(--vert); outline-offset: 3px; }

.diag__nav { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 28px; }
.diag__nav [data-suivant] { margin-left: auto; }
.bouton:disabled { opacity: .45; cursor: not-allowed; }

.bouton--lien {
  padding-left: 0;
  padding-right: 0;
  background: none;
  border-color: transparent;
  color: var(--vert-fonce);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.bouton--lien:hover { color: var(--nuit); }

.diag__resultat:focus { outline: none; }
.diag__titre {
  margin-bottom: 36px;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.2;
}
.diag__frise { grid-template-columns: 1fr; --frise-gap: 28px; }
.diag__frise li:not(:last-child)::after { top: 60px; bottom: calc(12px - var(--frise-gap)); left: 23px; right: auto; width: 2px; height: auto; }
.diag__frise li { padding-left: 72px; }
.diag__frise li::before { position: absolute; left: 0; top: 0; margin: 0; }
.diag__frise h4 { margin: 0 0 6px; font-family: var(--serif); font-size: 22px; font-weight: 600; line-height: 1.25; }

.diag__synthese {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 40px 0 0;
}
.diag__synthese > div { padding: 24px 26px; border-radius: 8px; background: var(--pale); border-left: 4px solid var(--vert); }
.diag__synthese dt { margin-bottom: 8px; color: var(--texte-2); font-size: 16px; font-weight: 600; }
.diag__synthese dd { margin: 0; display: grid; gap: 8px; }
.diag__synthese strong { font-family: var(--serif); font-size: 24px; font-weight: 600; line-height: 1.2; }
.diag__synthese span { color: var(--texte-2); font-size: 17px; }

.diag__mention { margin-top: 24px; color: var(--texte-2); font-size: 16px; font-style: italic; }
.diag__resultat .actions { margin-top: 28px; align-items: center; }
.diag__resultat .bouton--lien { width: auto; }

@media (max-width: 600px) {
  .diag__synthese { grid-template-columns: 1fr; }
  .diag__nav .bouton--lien, .diag__resultat .bouton--lien { width: auto; }
  .diag__nav [data-suivant] { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .diag__progression span { transition: none; }
}

/* En-tête : le logo garde sa taille, les liens laissent la place au bouton sur tablette */
.entete__logo { flex: none; }
.entete nav a { white-space: nowrap; }
@media (max-width: 900px) {
  .entete nav a:not(.bouton) { display: none; }
}
@media (max-width: 1100px) {
  .entete nav a:not(.bouton) { display: none; }
}