/* ============================================================
   AEI - Institut Agro Montpellier
   Charte : Vert AEI + Jaune Institut Agro (equilibre 50/50)
   ============================================================ */

:root {
  /* Couleurs principales */
  --vert: #1a5c3a;          /* Vert AEI (proche de l'app) */
  --vert-fonce: #123f28;
  --vert-clair: #e8f2ec;
  --jaune: #f5a623;         /* Jaune Institut Agro */
  --jaune-fonce: #d98e0f;
  --jaune-clair: #fef3e0;

  /* Neutres */
  --noir: #1c1c1a;
  --gris-fonce: #44443f;
  --gris: #6b6b64;
  --gris-clair: #e5e5df;
  --blanc: #ffffff;
  --fond: #ffffff;
  --fond-alt: #f7f8f5;

  /* Typographie */
  --font-titre: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-texte: 'Inter', system-ui, -apple-system, sans-serif;

  /* Layout */
  --max-largeur: 1200px;
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-texte);
  color: var(--noir);
  background: var(--fond);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-titre);
  font-weight: 700;
  line-height: 1.15;
  color: var(--vert);
}

/* ---------- Conteneur ---------- */
.conteneur {
  max-width: var(--max-largeur);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.entete {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--blanc);
  border-bottom: 1px solid var(--gris-clair);
}
.entete-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo img { height: 52px; width: auto; max-width: 60px; object-fit: contain; }
.logo-texte { display: flex; flex-direction: column; line-height: 1.2; }
.logo-texte .nom { font-family: var(--font-titre); font-weight: 700; font-size: 1.15rem; color: var(--vert); }
.logo-texte .sous { font-size: 0.75rem; color: var(--gris); }

/* Navigation */
.nav-liens {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-liens a {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gris-fonce);
  padding: 6px 0;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
}
.nav-liens a:hover,
.nav-liens a.actif {
  color: var(--vert);
  border-bottom-color: var(--jaune);
}

/* Bouton burger (mobile) */
.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--vert);
}

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-titre);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 13px 26px;
  border-radius: 50px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}
.btn-jaune { background: var(--jaune); color: var(--noir); }
.btn-jaune:hover { background: var(--jaune-fonce); transform: translateY(-2px); }
.btn-vert { background: var(--vert); color: var(--blanc); }
.btn-vert:hover { background: var(--vert-fonce); transform: translateY(-2px); }
.btn-contour { background: transparent; color: var(--vert); border-color: var(--vert); }
.btn-contour:hover { background: var(--vert); color: var(--blanc); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  color: var(--blanc);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
/* Carrousel de fond : slides superposees en fondu */
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}
.hero-slide.active { opacity: 1; }
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(18,63,40,0.92) 0%, rgba(18,63,40,0.75) 45%, rgba(18,63,40,0.35) 100%);
}
.hero-contenu {
  position: relative;
  z-index: 1;
  max-width: 620px;
}
.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-titre);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--jaune);
  margin-bottom: 20px;
}
.hero h1 {
  color: var(--blanc);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  margin-bottom: 20px;
}
.hero p {
  font-size: 1.15rem;
  margin-bottom: 32px;
  border-left: 4px solid var(--jaune);
  padding-left: 18px;
  color: #f0f0ec;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* Badge campus (haut droite hero) */
.badge-campus {
  position: absolute;
  top: 24px;
  right: 24px;
  z-index: 2;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--blanc);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--fond-alt); }
.section-titre {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-titre .eyebrow {
  font-family: var(--font-titre);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--jaune-fonce);
  display: block;
  margin-bottom: 12px;
}
.section-titre h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin-bottom: 16px; }
.section-titre p { color: var(--gris); font-size: 1.05rem; }

/* ---------- Cartes ---------- */
.grille-cartes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.carte {
  background: var(--blanc);
  border: 1px solid var(--gris-clair);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: var(--transition);
}
.carte:hover {
  transform: translateY(-6px);
  border-color: var(--jaune);
  box-shadow: 0 12px 30px rgba(26,92,58,0.1);
}
.carte-icone {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--vert-clair);
  color: var(--vert);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}
.carte h3 { font-size: 1.3rem; margin-bottom: 12px; }
.carte p { color: var(--gris); }

/* ---------- Bande CTA ---------- */
.bande-cta {
  background: var(--vert);
  color: var(--blanc);
  text-align: center;
  padding: 70px 0;
}
.bande-cta h2 { color: var(--blanc); font-size: clamp(1.8rem, 3.5vw, 2.4rem); margin-bottom: 16px; }
.bande-cta p { max-width: 560px; margin: 0 auto 32px; color: #e0ece5; font-size: 1.05rem; }

/* ---------- Pied de page ---------- */
.pied {
  background: var(--vert-fonce);
  color: #d6e2db;
  padding: 60px 0 24px;
}
.pied-grille {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.pied h4 { color: var(--blanc); font-size: 1.05rem; margin-bottom: 18px; }
.pied a { color: #d6e2db; transition: var(--transition); }
.pied a:hover { color: var(--jaune); }
.pied-liens li { margin-bottom: 10px; }
.pied-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.pied-logo img { height: 48px; width: auto; max-width: 56px; object-fit: contain; }
.pied-logo .nom { font-family: var(--font-titre); font-weight: 700; color: var(--blanc); }
.reseaux { display: flex; gap: 14px; margin-top: 16px; }
.reseaux a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}
.reseaux a:hover { background: var(--jaune); color: var(--noir); }
.pied-bas {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: #a9bdb2;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-liens {
    position: fixed;
    top: 76px;
    right: 0;
    width: 260px;
    height: calc(100vh - 76px);
    background: var(--blanc);
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 26px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -6px 0 20px rgba(0,0,0,0.08);
  }
  .nav-liens.ouvert { transform: translateX(0); }
  .nav-liens a { width: 100%; border-bottom: 1px solid var(--gris-clair); padding: 12px 0; }
  .nav-liens a:hover, .nav-liens a.actif { border-bottom-color: var(--gris-clair); }
  .burger { display: block; }
  .pied-grille { grid-template-columns: 1fr; gap: 30px; }
  .hero { min-height: 480px; }
}

/* ---------- Section Guide (telechargement) ---------- */
.guide-bloc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  background: var(--jaune-clair);
  border-radius: var(--radius);
  padding: 50px;
}
.guide-bloc .guide-texte h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 16px; }
.guide-bloc .guide-texte p { color: var(--gris-fonce); margin-bottom: 26px; font-size: 1.05rem; }
.guide-visuel {
  display: flex;
  justify-content: center;
}
.guide-visuel .fa-book-open {
  font-size: 8rem;
  color: var(--jaune);
}
@media (max-width: 760px) {
  .guide-bloc { grid-template-columns: 1fr; padding: 34px; text-align: center; gap: 30px; }
  .guide-visuel .fa-book-open { font-size: 5rem; }
}

/* ---------- Page interieure : banniere titre ---------- */
.banniere {
  background: var(--vert);
  color: var(--blanc);
  padding: 70px 0 60px;
  text-align: center;
}
.banniere h1 { color: var(--blanc); font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 14px; }
.banniere p { color: #d6e2db; max-width: 620px; margin: 0 auto; font-size: 1.1rem; }
.fil { font-size: 0.85rem; color: #a9bdb2; margin-bottom: 18px; }
.fil a { color: var(--jaune); }

/* ---------- Contenu texte (pages) ---------- */
.prose { max-width: 800px; margin: 0 auto; }
.prose h2 { font-size: 1.7rem; margin: 40px 0 16px; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 18px; color: var(--gris-fonce); font-size: 1.05rem; }
.prose ul.puces { margin: 0 0 20px 0; }
.prose ul.puces li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  color: var(--gris-fonce);
}
.prose ul.puces li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--jaune-fonce);
  font-weight: bold;
}

/* ---------- Grille equipe ---------- */
.pole-titre {
  text-align: center;
  font-family: var(--font-titre);
  font-size: 1.5rem;
  color: var(--vert);
  margin: 50px 0 30px;
  position: relative;
}
.pole-titre::after {
  content: '';
  display: block;
  width: 60px; height: 3px;
  background: var(--jaune);
  margin: 12px auto 0;
}
.grille-equipe {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 26px;
  max-width: 1000px;
  margin: 0 auto;
}
.membre {
  text-align: center;
}
.membre-photo {
  width: 150px; height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 4px solid var(--vert-clair);
  transition: var(--transition);
}
.membre:hover .membre-photo { border-color: var(--jaune); transform: scale(1.05); }
.membre .nom-membre { font-family: var(--font-titre); font-weight: 600; font-size: 1.05rem; color: var(--noir); }
.membre .role-membre { color: var(--jaune-fonce); font-weight: 600; font-size: 0.9rem; margin-bottom: 8px; }
.membre .wa {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; color: var(--vert);
}

/* Grille equipe : sur mobile, 2 colonnes */
@media (max-width: 640px) {
  .grille-equipe { grid-template-columns: 1fr 1fr; gap: 20px; }
  .membre-photo { width: 120px; height: 120px; }
}

/* ---------- Galerie evenements ---------- */
.galerie {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.galerie img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.galerie img:hover { transform: scale(1.03); }

/* ---------- Boutons stores (app) ---------- */
.stores { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; margin-top: 30px; }
.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--noir);
  color: var(--blanc);
  padding: 12px 24px;
  border-radius: 12px;
  transition: var(--transition);
  position: relative;
}
.btn-store:hover { background: var(--vert); transform: translateY(-2px); }
.btn-store i { font-size: 1.8rem; }
.btn-store .store-txt { display: flex; flex-direction: column; line-height: 1.2; text-align: left; }
.btn-store .store-txt .petit { font-size: 0.7rem; opacity: 0.8; }
.btn-store .store-txt .gros { font-size: 1rem; font-weight: 600; font-family: var(--font-titre); }
.btn-store .soon {
  position: absolute;
  top: -10px; right: -10px;
  background: var(--jaune);
  color: var(--noir);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  text-transform: uppercase;
}

/* ---------- Formulaire contact ---------- */
.form-contact { max-width: 620px; margin: 0 auto; }
.form-contact .champ { margin-bottom: 20px; }
.form-contact label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--vert); }
.form-contact input,
.form-contact textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--gris-clair);
  border-radius: var(--radius-sm);
  font-family: var(--font-texte);
  font-size: 1rem;
  transition: var(--transition);
}
.form-contact input:focus,
.form-contact textarea:focus {
  outline: none;
  border-color: var(--vert);
  box-shadow: 0 0 0 3px var(--vert-clair);
}
.form-contact textarea { resize: vertical; min-height: 140px; }

/* Cartes contact */
.contact-grille {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 50px;
}
.contact-carte {
  text-align: center;
  padding: 30px 24px;
  border: 1px solid var(--gris-clair);
  border-radius: var(--radius);
}
.contact-carte i { font-size: 2rem; color: var(--jaune); margin-bottom: 14px; }
.contact-carte h3 { font-size: 1.1rem; margin-bottom: 8px; }
.contact-carte a, .contact-carte p { color: var(--gris); font-size: 0.95rem; }

/* ---------- Sélecteur de langue ---------- */
.selecteur-langue {
  border: 1px solid var(--gris-clair);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-family: var(--font-titre);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--vert);
  background: var(--blanc);
  cursor: pointer;
  margin-left: 14px;
  transition: border-color var(--transition);
}
.selecteur-langue:hover { border-color: var(--vert); }
.selecteur-langue:focus { outline: 2px solid var(--vert); outline-offset: 1px; }
@media (max-width: 900px) {
  .selecteur-langue { margin-left: auto; margin-right: 10px; }
}

/* ---------- FAQ (accordéon) ---------- */
.faq-liste { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--blanc);
  border: 1px solid var(--gris-clair);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.faq-item:hover { border-color: var(--vert); }
.faq-item[open] { box-shadow: 0 8px 22px rgba(26,92,58,0.08); border-color: var(--vert); }
.faq-item summary {
  cursor: pointer;
  padding: 18px 20px;
  font-family: var(--font-titre);
  font-weight: 600;
  font-size: 1rem;
  color: var(--vert);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--jaune-fonce);
  transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-reponse {
  padding: 0 20px 20px;
  color: var(--gris-fonce);
  line-height: 1.7;
}

/* ---------- Correctif mobile : boutons dans le hero ---------- */
@media (max-width: 600px) {
  .hero { min-height: 0; padding: 100px 0 70px; }
  .hero-btns { margin-bottom: 10px; }
  .hero-btns .btn { width: 100%; text-align: center; justify-content: center; }
}