:root {
  --vert: #0b7a52;
  --vert-fonce: #075a3c;
  --vert-clair: #e8f6ef;
  --accent: #23c48e;
  --encre: #10201a;
  --texte: #33433d;
  --doux: #5d6b66;
  --trait: #dfe7e3;
  --fond: #ffffff;
  --fond-alt: #f6f9f7;
  --rayon: 14px;
  --largeur: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--fond);
  color: var(--texte);
  font:
    16px/1.6 system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--vert);
}

h1,
h2,
h3 {
  color: var(--encre);
  line-height: 1.2;
  margin: 0 0 0.6em;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 0 0 1em;
}

.conteneur {
  max-width: var(--largeur);
  margin: 0 auto;
  padding: 0 20px;
}

.saut {
  position: absolute;
  left: -999px;
}

.saut:focus {
  left: 12px;
  top: 12px;
  background: var(--fond);
  padding: 8px 12px;
  z-index: 10;
}

/* En-tête */
.entete {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--trait);
}

.entete .conteneur {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.entete img {
  height: 30px;
  width: auto;
  display: block;
}

.entete nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
}

.entete nav a {
  color: var(--texte);
  text-decoration: none;
}

.entete nav a:hover {
  color: var(--vert);
}

.entete nav .langue {
  border: 1px solid var(--trait);
  border-radius: 999px;
  padding: 4px 12px;
  font-weight: 600;
}

@media (max-width: 760px) {
  .entete nav a:not(.langue) {
    display: none;
  }
}

/* Bandeau */
.bandeau {
  padding: 84px 0 72px;
  background:
    radial-gradient(900px 400px at 85% -10%, var(--vert-clair), transparent 70%), var(--fond);
}

.surtitre {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--vert);
  margin-bottom: 14px;
}

.bandeau .chapeau {
  font-size: 1.2rem;
  max-width: 720px;
  color: var(--texte);
}

.boutons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.bouton {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--vert);
}

.bouton.plein {
  background: var(--vert);
  color: #fff;
}

.bouton.plein:hover {
  background: var(--vert-fonce);
}

.bouton.vide {
  color: var(--vert);
  background: transparent;
}

/* Sections */
section {
  padding: 72px 0;
}

section.alt {
  background: var(--fond-alt);
  border-top: 1px solid var(--trait);
  border-bottom: 1px solid var(--trait);
}

.intro {
  max-width: 760px;
  margin-bottom: 36px;
}

.grille {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.carte {
  background: var(--fond);
  border: 1px solid var(--trait);
  border-radius: var(--rayon);
  padding: 24px;
}

.carte .num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--vert);
  letter-spacing: 0.06em;
}

.carte p:last-child,
.carte ul:last-child {
  margin-bottom: 0;
}

.carte ul {
  padding-left: 1.1em;
  margin: 0 0 1em;
}

/* Chiffres */
.chiffres {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-top: 8px;
}

.chiffre strong {
  display: block;
  font-size: 2rem;
  color: var(--vert);
  line-height: 1.1;
}

.chiffre span {
  color: var(--doux);
  font-size: 0.95rem;
}

/* Parcours */
.etapes {
  counter-reset: etape;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

.etapes li {
  counter-increment: etape;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: start;
  background: var(--fond);
  border: 1px solid var(--trait);
  border-radius: var(--rayon);
  padding: 20px;
}

.etapes li::before {
  content: counter(etape);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--vert-clair);
  color: var(--vert);
  font-weight: 700;
}

.etapes h3 {
  margin-bottom: 0.3em;
}

.etapes p {
  margin: 0;
}

/* Architecture */
.archi {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin: 8px 0 28px;
}

.archi div {
  border-radius: 12px;
  padding: 16px;
  background: var(--vert-clair);
  border: 1px solid #cdeadb;
}

.archi b {
  display: block;
  color: var(--vert-fonce);
  margin-bottom: 4px;
}

.archi span {
  font-size: 0.92rem;
}

/* Contact */
.contact {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.contact dt {
  font-weight: 700;
  color: var(--encre);
}

.contact dd {
  margin: 0 0 14px;
}

/* Pied */
footer {
  padding: 28px 0;
  border-top: 1px solid var(--trait);
  font-size: 0.9rem;
  color: var(--doux);
}

footer .conteneur {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* Marque Subflow */
.marque {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--encre);
}

.marque svg {
  width: 30px;
  height: 30px;
  display: block;
}

.marque b {
  font-size: 1.3rem;
  letter-spacing: -0.02em;
}

.marque small {
  color: var(--doux);
  font-size: 0.8rem;
  font-weight: 500;
}

@media (max-width: 420px) {
  .marque small {
    display: none;
  }
}

.produit-de {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.produit-de img {
  height: 18px;
  width: auto;
}