/* ==========================================================================
   ADValor — Feuille de style du modèle de mise en page
   Couleurs neutres, à remplacer par la charte définitive.
   ========================================================================== */

:root {
  /* Couleurs — remplacer par la charte ADValor */
  --encre:        #12161c;
  --encre-fonce:  #0b1420;
  --encre-douce:  #4a5361;
  --accent:       #1f3864;
  --accent-vif:   #2d55a0;
  --accent-clair: #eaeef6;
  --fond:         #ffffff;
  --fond-alterne: #f6f7f9;
  --bordure:      #dde1e7;

  /* Typographie */
  --police-titre: Georgia, "Times New Roman", serif;
  --police-texte: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Rythme */
  --largeur: 1160px;
  --gouttiere: 24px;
  --rayon: 4px;
  --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* --- Base ---------------------------------------------------------------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--police-texte);
  font-size: 17px;
  line-height: 1.65;
  color: var(--encre);
  background: var(--fond);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--police-titre);
  font-weight: 600;
  line-height: 1.18;
  margin: 0 0 16px;
}

h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); letter-spacing: -0.015em; }
h2 { font-size: clamp(1.55rem, 2.9vw, 2.15rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }

h1 em, h2 em {
  font-style: normal;
  color: var(--accent-vif);
}

p { margin: 0 0 16px; }

a { color: var(--accent); text-underline-offset: 3px; }

ul { margin: 0 0 16px; padding-left: 20px; }

/* --- Utilitaires --------------------------------------------------------- */

.conteneur {
  width: 100%;
  max-width: var(--largeur);
  margin: 0 auto;
  padding: 0 var(--gouttiere);
}

.conteneur--etroit { max-width: 720px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* --- Barre de progression de lecture ------------------------------------- */

.barre-progression {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 80;
  background: transparent;
}

.barre-progression span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent-vif);
  transition: width 0.12s linear;
}

/* --- En-tête ------------------------------------------------------------- */

.entete {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.entete.est-dense {
  border-bottom-color: var(--bordure);
  box-shadow: 0 6px 24px rgba(18, 22, 28, 0.06);
}

.entete__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--encre);
}

.logo__nom {
  font-family: var(--police-titre);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.logo__secteur {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--encre-douce);
}

.menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.menu__liste {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu__liste a {
  position: relative;
  text-decoration: none;
  color: var(--encre);
  font-size: 0.94rem;
  padding-bottom: 3px;
}

.menu__liste a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent-vif);
  transition: width var(--transition);
}

.menu__liste a:hover::after { width: 100%; }

.menu-bouton {
  display: none;
  width: 42px; height: 42px;
  background: none;
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  cursor: pointer;
  position: relative;
}

.menu-bouton__barre,
.menu-bouton__barre::before,
.menu-bouton__barre::after {
  position: absolute;
  left: 50%;
  width: 20px; height: 2px;
  background: var(--encre);
  transform: translateX(-50%);
  content: "";
}
.menu-bouton__barre { top: 50%; margin-top: -1px; }
.menu-bouton__barre::before { top: -6px; }
.menu-bouton__barre::after { top: 6px; }

/* --- Boutons ------------------------------------------------------------- */

.bouton {
  position: relative;
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--rayon);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  overflow: hidden;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.bouton--principal {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 2px rgba(31, 56, 100, 0.2);
}
.bouton--principal:hover {
  background: var(--accent-vif);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(31, 56, 100, 0.24);
}

.bouton--secondaire {
  background: transparent;
  color: var(--encre);
  border-color: var(--bordure);
}
.bouton--secondaire:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.bouton--large { width: 100%; text-align: center; padding: 15px 26px; }

/* --- Ouverture ----------------------------------------------------------- */

.hero {
  position: relative;
  padding: 92px 0 72px;
  background:
    radial-gradient(circle at 88% 8%, rgba(45, 85, 160, 0.09), transparent 55%),
    linear-gradient(180deg, #fbfcfd 0%, #ffffff 100%);
  border-bottom: 1px solid var(--bordure);
}

.hero__inner { max-width: 940px; }

.sur-titre {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 20px;
}

.sur-titre--clair { color: rgba(255,255,255,0.75); }

.hero__sous-titre {
  font-size: clamp(1.05rem, 1.75vw, 1.28rem);
  color: var(--encre-douce);
  max-width: 720px;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 8px;
}

/* Bandeau de preuves chiffrées */

.preuves {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin: 40px 0 34px;
  padding: 28px 0;
  border-top: 1px solid var(--bordure);
  border-bottom: 1px solid var(--bordure);
}

.preuve__valeur {
  font-family: var(--police-titre);
  font-size: clamp(1.75rem, 2.7vw, 2.3rem);
  line-height: 1;
  margin: 0 0 8px;
  color: var(--accent);
}

.preuve__legende {
  font-size: 0.85rem;
  color: var(--encre-douce);
  line-height: 1.45;
  margin: 0;
}

.hero__signature {
  font-family: var(--police-titre);
  font-size: 1.12rem;
  font-style: italic;
  color: var(--accent);
  margin: 0;
}

/* --- Ruban --------------------------------------------------------------- */

.ruban {
  padding: 20px 0;
  background: var(--accent);
  color: #fff;
}

.ruban__liste {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* --- Sections ------------------------------------------------------------ */

.section { padding: 88px 0; }
.section--alternee { background: var(--fond-alterne); }

.section--encre {
  background: var(--encre-fonce);
  color: #fff;
}
.section--encre .section__chapô { color: rgba(255,255,255,0.78); }
.section--encre .chiffre { border-left-color: var(--accent-vif); }
.section--encre .chiffre__legende { color: rgba(255,255,255,0.72); }
.section--encre .note { color: rgba(255,255,255,0.6); }
.section--encre .section__titre em { color: #8fb0e8; }

.section--sombre {
  background: var(--accent);
  color: #fff;
}
.section--sombre .section__titre,
.section--sombre a { color: #fff; }

.entete-section { margin-bottom: 48px; }
.entete-section .section__titre { margin-bottom: 18px; }

.section__titre { max-width: 780px; }

.section__chapô {
  max-width: 700px;
  color: var(--encre-douce);
  font-size: 1.06rem;
  margin-bottom: 0;
}
.section--sombre .section__chapô { color: rgba(255,255,255,0.82); }

/* --- Grilles ------------------------------------------------------------- */

.grille {
  display: grid;
  gap: var(--gouttiere);
}

.grille--2 { grid-template-columns: repeat(2, 1fr); }
.grille--3 { grid-template-columns: repeat(3, 1fr); }

/* --- Cartes -------------------------------------------------------------- */

.carte {
  position: relative;
  background: var(--fond);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition),
              border-color var(--transition);
}

.carte:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(18, 22, 28, 0.09);
  border-color: #c6ccd6;
}

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

.carte__rang {
  font-family: var(--police-titre);
  font-size: 1.6rem;
  color: var(--accent-vif);
  margin-bottom: 6px;
  line-height: 1;
}

.carte--offre { border-top: 3px solid var(--accent); }
.carte--offre:hover { border-top-color: var(--accent-vif); }

.carte--offre__haut { flex: 1; }

.carte__accroche {
  font-family: var(--police-titre);
  font-size: 1.04rem;
  font-style: italic;
  color: var(--accent);
  padding-left: 14px;
  border-left: 2px solid var(--accent-clair);
  margin-bottom: 16px;
}

.etiquette {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.liste-simple {
  list-style: none;
  padding: 0;
  margin: 8px 0 22px;
  font-size: 0.94rem;
  color: var(--encre-douce);
}

.liste-simple li {
  padding: 6px 0 6px 22px;
  position: relative;
}

.liste-simple li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 8px; height: 8px;
  background: var(--accent-clair);
  border: 1px solid var(--accent);
  border-radius: 50%;
}

.lien-fleche {
  margin-top: auto;
  font-weight: 600;
  font-size: 0.94rem;
  text-decoration: none;
  align-self: flex-start;
}
.lien-fleche::after {
  content: " →";
  display: inline-block;
  transition: transform var(--transition);
}
.lien-fleche:hover::after { transform: translateX(5px); }

/* --- Bandeau d'urgence --------------------------------------------------- */

.bandeau-urgence {
  margin-top: 32px;
  padding: 30px 32px;
  background: var(--fond);
  border: 1px solid var(--bordure);
  border-left: 3px solid var(--accent);
  border-radius: var(--rayon);
}

.bandeau-urgence__titre {
  font-family: var(--police-titre);
  font-size: 1.15rem;
  margin-bottom: 14px;
}

.bandeau-urgence__liste {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.bandeau-urgence__liste li {
  font-size: 0.94rem;
  color: var(--encre-douce);
  padding-top: 14px;
  border-top: 1px solid var(--bordure);
}

/* --- Chiffres ------------------------------------------------------------ */

.chiffres { margin-bottom: 28px; }

.chiffre {
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.chiffre__valeur {
  font-family: var(--police-titre);
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  line-height: 1;
  margin: 0 0 12px;
}

.chiffre__legende {
  font-size: 0.94rem;
  color: var(--encre-douce);
  margin: 0;
}

.note {
  font-size: 0.85rem;
  color: var(--encre-douce);
  font-style: italic;
}

/* --- Bandeau des bénéfices ----------------------------------------------- */

.bandeau {
  margin-top: 32px;
  padding: 32px;
  background: var(--fond);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
}

.benefices__titre {
  font-family: var(--police-titre);
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.benefice__nom {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
  font-size: 0.98rem;
}

.benefice p:last-child { margin-bottom: 0; }

.benefice p {
  font-size: 0.94rem;
  color: var(--encre-douce);
}

/* --- Appel à l'action en ligne ------------------------------------------- */

.appel-inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 32px;
  padding: 28px 32px;
  background: var(--accent-clair);
  border-radius: var(--rayon);
}

.appel-inline p { margin: 0; max-width: 620px; }

/* --- Associés ------------------------------------------------------------ */

.associes {
  display: grid;
  grid-template-columns: minmax(0, 460px);
  gap: var(--gouttiere);
  margin: 56px 0 18px;
}

.associe {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  border-top: 1px solid var(--bordure);
  padding-top: 26px;
}

.associe__portrait {
  flex: 0 0 auto;
  width: 74px; height: 74px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-clair);
  color: var(--accent);
  font-family: var(--police-titre);
  font-size: 1.35rem;
  border-radius: 50%;
  transition: transform var(--transition);
}

.associe:hover .associe__portrait { transform: scale(1.06); }

.associe h3 { margin-bottom: 4px; }

.associe__fonction {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--encre-douce);
  margin-bottom: 14px;
}

.associe blockquote {
  margin: 0;
  font-size: 0.96rem;
  color: var(--encre-douce);
  line-height: 1.6;
}

/* --- Engagements --------------------------------------------------------- */

.engagement { border-left: 3px solid transparent; }

.engagement:hover { border-left-color: var(--accent-vif); }

.engagement__demande {
  font-family: var(--police-titre);
  font-size: 1.08rem;
  color: var(--accent);
  margin-bottom: 12px;
}

/* --- Contact ------------------------------------------------------------- */

.grille-contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.liste-atouts {
  list-style: none;
  padding: 0;
  margin: 24px 0 24px;
}

.liste-atouts li {
  position: relative;
  padding: 8px 0 8px 30px;
  font-size: 0.98rem;
}

.liste-atouts li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 8px;
  color: #8fb0e8;
  font-weight: 700;
}

.formulaire {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--rayon);
  padding: 30px;
}

.formulaire__ligne {
  display: flex;
  flex-direction: column;
  margin-bottom: 18px;
}

.formulaire__ligne label {
  font-size: 0.85rem;
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.formulaire__ligne input[type="text"],
.formulaire__ligne input[type="email"],
.formulaire__ligne input[type="tel"],
.formulaire__ligne textarea {
  font: inherit;
  font-size: 0.98rem;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--rayon);
  background: rgba(255,255,255,0.96);
  color: var(--encre);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.formulaire__ligne input:focus,
.formulaire__ligne textarea:focus {
  outline: none;
  border-color: #fff;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.28);
}

.facultatif { opacity: 0.7; }

.formulaire__ligne--case {
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
}

.formulaire__ligne--case label {
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0;
}

.contact-direct { font-size: 0.94rem; color: rgba(255,255,255,0.85); }

/* --- Messages du formulaire ---------------------------------------------- */

.formulaire__erreur {
  margin: 0 0 16px;
  padding: 12px 16px;
  background: rgba(255, 214, 214, 0.14);
  border-left: 3px solid #ffb4b4;
  border-radius: var(--rayon);
  font-size: 0.92rem;
  color: #ffe4e4;
}

.formulaire__aide {
  margin: 14px 0 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.68);
}

/* --- Confirmation d'envoi ------------------------------------------------ */

.confirmation {
  padding: 34px 32px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-left: 4px solid #8fb0e8;
  border-radius: var(--rayon);
  animation: apparitionConfirmation 0.5s ease both;
}

@keyframes apparitionConfirmation {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

.confirmation__titre {
  font-family: var(--police-titre);
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.confirmation p:last-child {
  margin-bottom: 0;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.82);
}

@media (prefers-reduced-motion: reduce) {
  .confirmation { animation: none; }
}

/* --- Pied de page -------------------------------------------------------- */

.pied {
  padding: 32px 0;
  border-top: 1px solid var(--bordure);
  font-size: 0.88rem;
  color: var(--encre-douce);
}

.pied__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.pied__marque { margin: 0; }

.pied__liste {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ==========================================================================
   Mouvement
   Apparition au défilement, décalée pour créer un effet de vague.
   ========================================================================== */

.apparait {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}

.apparait.est-visible {
  opacity: 1;
  transform: none;
}

/* Les cartes apparaissent avec un très léger effet de montée, décalé. */
.grille .apparait:nth-child(1) { transition-delay: 0s; }
.grille .apparait:nth-child(2) { transition-delay: 0.08s; }
.grille .apparait:nth-child(3) { transition-delay: 0.16s; }
.grille .apparait:nth-child(4) { transition-delay: 0.24s; }

/* --- Illustration pleine largeur ----------------------------------------- */

.visuel {
  margin: 0;
  background: var(--encre-fonce);
  border-bottom: 1px solid var(--bordure);
}

.visuel img {
  display: block;
  width: 100%;
  height: clamp(240px, 34vw, 460px);
  object-fit: cover;
  filter: saturate(0.85) contrast(1.03);
}

.visuel figcaption {
  max-width: var(--largeur);
  margin: 0 auto;
  padding: 18px var(--gouttiere);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.5;
}

/* --- Bandeau d'approche (trois principes) -------------------------------- */

.bandeau__titre {
  font-family: var(--police-titre);
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.approche__nom {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
  font-size: 0.98rem;
}

.approche__item p:last-child {
  margin-bottom: 0;
  font-size: 0.94rem;
  color: var(--encre-douce);
}

/* --- Adaptation mobile --------------------------------------------------- */

@media (max-width: 980px) {
  .grille-contact { grid-template-columns: 1fr; gap: 36px; }
  .visuel img { height: clamp(200px, 46vw, 320px); }
}

@media (max-width: 900px) {
  .grille--2,
  .grille--3 { grid-template-columns: 1fr; }

  .preuves { grid-template-columns: repeat(2, 1fr); gap: 20px; }

  .hero { padding: 64px 0 56px; }
  .section { padding: 60px 0; }
  .associes { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .menu-bouton { display: block; }

  .menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--bordure);
    padding: 16px var(--gouttiere) 24px;
    display: none;
    box-shadow: 0 18px 30px rgba(18, 22, 28, 0.08);
  }

  .menu.est-ouvert { display: flex; }

  .menu__liste {
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
  }

  .menu__liste a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--bordure);
  }

  .ruban__liste { gap: 10px 20px; font-size: 0.75rem; }

  .preuves { grid-template-columns: 1fr 1fr; }

  .appel-inline { flex-direction: column; align-items: flex-start; }

  .associe { flex-direction: column; gap: 16px; }
}

/* --- Accessibilité ------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .apparait { opacity: 1; transform: none; }
}

:focus-visible {
  outline: 2px solid var(--accent-vif);
  outline-offset: 3px;
}