/* Styles communs à toutes les pages : variables, composants, en-tête, pied de page. */

:root {
  --bleu: #1E56A8;
  --bleu-2: #2563C0;
  --marine: #0D1B5E;
  --marine-2: #0A1447;
  --cyan: #00A8E8;
  --cyan-clair: #E6F6FD;
  --texte: #1C2541;
  --gris: #5B6478;
  --gris-clair: #E3E8F0;
  --fond: #F4F7FB;
  --blanc: #FFFFFF;
  --alerte: #E5484D;
  --succes: #12A150;
  --rayon: 14px;
  --ombre: 0 10px 30px rgba(13, 27, 94, .10);
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Montserrat", system-ui, sans-serif;
  color: var(--texte);
  background: var(--blanc);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

/* Mise en page */
.conteneur { width: min(1320px, 100% - 32px); margin-inline: auto; }
section { padding: 72px 0; scroll-margin-top: 72px; }
.fond-clair { background-color: var(--fond); }
.fond-marine {
  background-color: var(--marine);
  background-image: linear-gradient(160deg, var(--bleu) 0%, var(--marine) 55%, var(--marine-2) 100%);
  color: var(--blanc);
}

/* Titres de section : barre cyan + jeu de graisses, comme la brochure */
.titre {
  display: flex;
  gap: 14px;
  align-items: stretch;
  margin: 0 0 14px;
  font-weight: 800;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  text-transform: uppercase;
  color: var(--bleu);
}
.titre::before { content: ""; flex: none; width: 6px; border-radius: 3px; background: var(--cyan); }
.titre em { font-style: normal; font-weight: 300; }
.fond-marine .titre { color: var(--blanc); }
.chapo { max-width: 640px; margin: 0 0 32px; color: var(--gris); font-size: 1.05rem; }
.fond-marine .chapo { color: rgba(255, 255, 255, .78); }

/* Boutons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  font: 700 .95rem/1 "Montserrat", sans-serif;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease;
  box-shadow: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-cyan { background: var(--cyan); color: var(--blanc); }
.btn-cyan:hover { background: #0096d1; }
.btn-contour { border-color: rgba(255, 255, 255, .55); color: var(--blanc); }
.btn-contour:hover { background: rgba(255, 255, 255, .1); }
.btn-bleu { background: var(--bleu); color: var(--blanc); }
.btn-bleu:hover { background: var(--bleu-2); }
.btn[disabled] { background: var(--gris-clair); color: var(--gris); cursor: not-allowed; transform: none; }

/* Petits composants */
.icone {
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--cyan-clair);
  color: var(--bleu);
  display: grid;
  place-items: center;
}
.icone svg { width: 24px; height: 24px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--cyan-clair);
  color: var(--bleu);
  font-size: .8rem;
  font-weight: 700;
}

/* En-tête */
.entete {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gris-clair);
}
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo img { height: 44px; width: auto; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { text-decoration: none; font-weight: 600; font-size: .92rem; color: var(--texte); }
.nav a:hover { color: var(--bleu); }
.nav .btn { padding: 11px 20px; color: var(--blanc); }

/* Pied de page */
.pied {
  background: var(--marine-2);
  color: rgba(255, 255, 255, .75);
  padding: 48px 0 28px;
  font-size: .9rem;
  border-top: 4px solid var(--cyan);
}
.pied-grille { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; }
.pied img { height: 46px; width: auto; margin-bottom: 14px; }
.pied h4 { margin: 0 0 10px; color: var(--blanc); font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; }
.pied a { text-decoration: none; }
.pied a:hover { color: var(--cyan); }
.pied p { margin: 0 0 6px; }
.mention {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: .78rem;
  color: rgba(255, 255, 255, .55);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* WhatsApp flottant & barre mobile */
.whatsapp {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: grid;
  place-items: center;
  text-decoration: none;
  transition: transform .2s ease, bottom .25s ease;
  isolation: isolate;
}
.whatsapp:hover { transform: scale(1.06); }
.whatsapp svg { width: 30px; height: 30px; }
.barre-mobile { display: none; }

/* Responsive */
@media (max-width: 860px) {
  section { padding: 52px 0; }
  .nav a:not(.btn) { display: none; }
  .pied { padding-bottom: 110px; }
  .pied-grille { grid-template-columns: 1fr; }

  .barre-mobile {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 55;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    background: var(--blanc);
    border-top: 1px solid var(--gris-clair);
    transform: translateY(110%);
    transition: transform .25s ease;
  }
  .barre-mobile.visible { transform: none; }
  .barre-mobile b { display: block; color: var(--bleu); font-size: 1rem; line-height: 1.2; }
  .barre-mobile span { font-size: .8rem; color: var(--gris); }
  .barre-mobile .btn { padding: 12px 22px; flex: none; }
  .whatsapp { right: 16px; bottom: 16px; width: 54px; height: 54px; }
  body.barre-active .whatsapp { bottom: 88px; }
}

@media (max-width: 560px) {
  .logo img { height: 36px; }
}

/* Animations */
.entete { transition: box-shadow .25s ease; }
.entete.defile { box-shadow: 0 6px 20px rgba(13, 27, 94, .10); }

/* Apparition au défilement : ces classes ne sont posées que par main.js,
   le contenu reste donc visible si le JavaScript ne s'exécute pas. */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.2, .7, .3, 1);
}
.reveal.visible { opacity: 1; transform: none; }

/* Le bouton WhatsApp attire l'œil quelques instants, puis reste calme. */
.whatsapp::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25D366;
  z-index: -1;
  animation: pulsation 1.8s ease-out 1.5s 3 both;
}
@keyframes pulsation {
  from { transform: scale(1); opacity: .55; }
  to { transform: scale(1.7); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media print {
  .reveal { opacity: 1 !important; transform: none !important; }
}