:root {
  --vert-principal: #075E54;
  --vert-clair: #25D366;
  --fond-clair: #F0F2F5;
  --texte-sombre: #1c1e21;
  --texte-gris: #667781;
  --blanc: #ffffff;
  --erreur: #d32f2f;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--fond-clair);
  color: var(--texte-sombre);
  min-height: 100vh;
}

.entete {
  background-color: var(--blanc);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--vert-principal);
  letter-spacing: -0.5px;
}

.conteneur-accueil {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px;
  text-align: center;
}

.slogan {
  font-size: 28px;
  font-weight: 600;
  color: var(--texte-sombre);
  margin-bottom: 16px;
  line-height: 1.3;
}

.message-bienvenue {
  font-size: 17px;
  color: var(--texte-gris);
  margin-bottom: 24px;
  line-height: 1.5;
}

.description {
  font-size: 15px;
  color: var(--texte-gris);
  margin-bottom: 40px;
  line-height: 1.6;
}

.boutons-action {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.bouton {
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s;
}

.bouton:hover { opacity: 0.9; }

.bouton-principal {
  background-color: var(--vert-principal);
  color: var(--blanc);
}

.bouton-secondaire {
  background-color: var(--blanc);
  color: var(--vert-principal);
  border: 2px solid var(--vert-principal);
}

.conteneur-formulaire {
  max-width: 420px;
  margin: 60px auto;
  padding: 40px 32px;
  background-color: var(--blanc);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.titre-formulaire {
  font-size: 22px;
  font-weight: 700;
  color: var(--texte-sombre);
  margin-bottom: 28px;
  text-align: center;
}

.champ-groupe {
  margin-bottom: 20px;
}

.champ-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--texte-sombre);
  margin-bottom: 6px;
}

.champ-saisie {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid #d0d5dd;
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.2s;
}

.champ-saisie:focus {
  outline: none;
  border-color: var(--vert-principal);
}

.checkbox-groupe {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}

.checkbox-groupe input { margin-top: 3px; }

.checkbox-groupe label {
  font-size: 14px;
  color: var(--texte-gris);
  line-height: 1.4;
}

.bouton-pleine-largeur {
  width: 100%;
  padding: 14px;
  background-color: var(--vert-principal);
  color: var(--blanc);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 20px;
}

.bouton-pleine-largeur:hover { opacity: 0.9; }

.liens-secondaires {
  text-align: center;
}

.liens-secondaires a {
  display: block;
  color: var(--vert-principal);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 10px;
}

.liens-secondaires a:hover { text-decoration: underline; }

.message-erreur {
  background-color: #fdecea;
  color: var(--erreur);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.message-succes {
  background-color: #e6f4ea;
  color: #1e7e34;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

@media (max-width: 600px) {
  .slogan { font-size: 22px; }
  .conteneur-formulaire { margin: 24px 16px; padding: 28px 20px; }
}