* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: Arial, Helvetica, sans-serif;
  background: #000000;
  color: #ffffff;
  line-height: 1.55;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: #b197fc;
}

main {
  flex: 1;
  background: linear-gradient(180deg, #000000, #2e114d 42%, #0a0a0a 78%, #000000);
}

.entete {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #000000;
  border-bottom: 1px solid #222222;
}

.largeur {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 2rem;
}

.entete .largeur {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.marque {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: 1.25rem;
  justify-content: flex-end;
}

.menu a {
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.menu a.actif {
  color: #b197fc;
}

.pied {
  margin-top: auto;
  padding: 2rem 0;
  background: #000000;
  border-top: 1px solid #222222;
}

.pied .largeur {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #9a9a9a;
}

.pied nav {
  display: flex;
  gap: 1.25rem;
}

.pied a {
  color: #9a9a9a;
}

.pied a:hover {
  color: #b197fc;
}

.haut-projet {
  padding: 2.5rem 0 1.5rem;
}

.grille {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.grille figure {
  margin: 0;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid #333333;
}

.grille img {
  width: 100%;
  object-fit: cover;
}

.carte {
  background: #1a1a1a;
  border-radius: 24px;
  padding: 2rem;
  border: 1px solid #2a2a2a;
}

.carte h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.carte .bouton {
  margin-bottom: 1.25rem;
}

.carte .texte {
  margin: 0;
  color: #c8c8c8;
  font-size: 0.95rem;
}

.bouton {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: #b197fc;
  color: #0a0a0a;
}

.bouton.grand {
  padding: 1rem 2.25rem;
  font-size: 0.8rem;
}

.bouton:hover {
  filter: brightness(1.05);
}

.milieu {
  padding: 2rem 0;
}

.encadre {
  max-width: 820px;
  margin: 0 auto;
}

.encadre .texte {
  margin: 0;
  text-align: center;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.07em;
  line-height: 1.7;
  color: #c8c8c8;
}

.appel {
  padding: 2rem 0;
}

.appel .carte {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.appel h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.appel .texte {
  margin: 0 0 1.5rem;
  color: #c8c8c8;
}

.fin {
  padding: 3rem 0 4rem;
  text-align: center;
}

.fin h2 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 800;
}

.violet {
  color: #b197fc;
}

@media (max-width: 900px) {
  .grille {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .largeur {
    padding: 0 1.25rem;
  }

  .entete .largeur {
    gap: 0.75rem;
  }

  .marque {
    font-size: 0.85rem;
    letter-spacing: 0.04em;
  }

  .menu {
    max-width: 72vw;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .menu ul {
    gap: 0.85rem;
  }

  .menu a {
    font-size: 0.7rem;
    letter-spacing: 0.06em;
  }

  .fin h2 {
    font-size: 1.35rem;
  }
}