:root {
  --bleu:         #1C4E7E;
  --bleu-profond: #123252;
  --brume:        #EDF2F8;
  --encre:        #16232E;
  --encre-doux:   #5B6A78;
  --papier:       #FFFFFF;
  --papier-alt:   #F5F8FB;
  --bordure:      #E1E7EE;

  --serif:  "Newsreader", Georgia, serif;
  --sans:   "Public Sans", system-ui, -apple-system, sans-serif;

  --enveloppe:   1140px;
  --enveloppe-e:  720px;
  --rayon:          6px;
  --transition: 180ms ease;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--encre);
  background: var(--papier);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.25;
  color: var(--bleu-profond);
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.1rem, 5vw, 3.1rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); }
h3 { font-size: 1.2rem; font-weight: 500; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--bleu); }
a:hover { color: var(--bleu-profond); }

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

:focus-visible {
  outline: 2px solid var(--bleu);
  outline-offset: 3px;
  border-radius: 2px;
}

.evitement {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--bleu);
  color: #fff;
  padding: 12px 20px;
  text-decoration: none;
}
.evitement:focus { left: 0; color: #fff; }

.enveloppe {
  width: 100%;
  max-width: var(--enveloppe);
  margin-inline: auto;
  padding-inline: 24px;
}
.enveloppe--etroite { max-width: var(--enveloppe-e); }

.entete {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bordure);
}
.entete__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.logo {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--bleu-profond);
  text-decoration: none;
  line-height: 1.2;
}
.logo__role {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--encre-doux);
  margin-top: 3px;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav a {
  font-size: 0.93rem;
  text-decoration: none;
  color: var(--encre);
  transition: color var(--transition);
}
.nav a:hover { color: var(--bleu); }

.nav__item--sous { position: relative; }
.nav__item--sous > a::after {
  content: "▾";
  font-size: 0.7em;
  margin-left: 5px;
  vertical-align: middle;
}

.nav .sous-menu {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  margin: 0;
  padding: 8px 0;
  list-style: none;
  background: var(--papier);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  box-shadow: 0 10px 30px rgba(18, 50, 82, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 60;
}
.nav__item--sous:hover .sous-menu,
.nav__item--sous:focus-within .sous-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.nav .sous-menu li { border: 0; }
.nav .sous-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  white-space: nowrap;
  color: var(--encre);
}
.nav .sous-menu a:hover { background: var(--brume); color: var(--bleu); }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  width: 24px;
  margin-inline: auto;
  background: var(--bleu-profond);
  transition: transform var(--transition), opacity var(--transition);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.bouton {
  display: inline-block;
  background: var(--bleu);
  color: #fff!important;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: var(--rayon);
  transition: background var(--transition), transform var(--transition);
}
.bouton:hover {
  background: var(--bleu-profond);
  color: #fff;
  transform: translateY(-1px);
}
.bouton--petit { padding: 9px 18px; font-size: 0.88rem; }
.bouton--secondaire {
  background: var(--bleu);
  color: var(--bleu);
  box-shadow: inset 0 0 0 1px var(--bleu);
}
.bouton--secondaire:hover { background: var(--bleu-profond); color: var(--bleu-profond); }

.lien-discret {
  font-size: 0.95rem;
  color: var(--encre-doux);
  text-decoration: none;
  border-bottom: 1px solid var(--bordure);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}
.lien-discret:hover { color: var(--bleu); border-color: var(--bleu); }

.hero {
  padding: clamp(70px, 11vw, 130px) 0;
  background: linear-gradient(180deg, var(--brume) 0%, var(--papier) 100%);
}
.hero--court { padding: clamp(56px, 8vw, 90px) 0; }
.hero__inner { max-width: 760px; }

.surtitre {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bleu);
  margin-bottom: 1.2em;
}

.chapo {
  font-size: clamp(1.05rem, 2.2vw, 1.22rem);
  line-height: 1.65;
  color: var(--encre-doux);
  max-width: 60ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 30px;
  margin-top: 2.2em;
}

.section { padding: clamp(56px, 8vw, 96px) 0; }
.section--alt {
  background: var(--papier-alt);
  border-block: 1px solid var(--bordure);
}

.section h2 {
  position: relative;
  padding-left: 20px;
  margin-bottom: 1.1em;
}
.section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 3px;
  background: var(--bleu);
  border-radius: 2px;
}

.sous-titre { margin-top: 48px; margin-bottom: 0.7em; }
.note { font-size: 0.9rem; color: var(--encre-doux); }

.grille {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 36px;
}
.grille--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.carte {
  background: var(--papier);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 30px;
}
.carte h3 {
  color: var(--bleu);
  margin-bottom: 0.6em;
}
.carte p { font-size: 0.96rem; color: var(--encre-doux); }
.carte address { font-style: normal; color: var(--encre-doux); margin-bottom: 1.1em; }
.section--alt .carte { background: var(--papier); }

.carte--lien {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.carte--lien:hover {
  border-color: var(--bleu);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(18, 50, 82, 0.10);
}
.carte__fleche {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--bleu);
}

.etapes {
  list-style: none;
  counter-reset: etape;
  margin: 0 0 1.5em;
  padding: 0;
}
.etapes li {
  counter-increment: etape;
  position: relative;
  padding: 12px 0 12px 46px;
  border-bottom: 1px solid var(--bordure);
}
.etapes li::before {
  content: counter(etape);
  position: absolute;
  left: 0;
  top: 12px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: var(--brume);
  color: var(--bleu);
  border-radius: 50%;
  font-size: 0.82rem;
  font-weight: 600;
}

.tarifs { margin: 32px 0 24px; }
.tarifs > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--bordure);
}
.tarifs dt { margin: 0; }
.tarifs dd {
  margin: 0;
  font-weight: 600;
  white-space: nowrap;
  color: var(--bleu);
}
.precision {
  display: block;
  font-size: 0.84rem;
  font-weight: 400;
  color: var(--encre-doux);
}

.horaires { margin: 0; }
.horaires > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-bottom: 1px solid var(--bordure);
  font-size: 0.95rem;
}
.horaires > div:last-child { border-bottom: 0; }
.horaires dt { margin: 0; color: var(--encre-doux); }
.horaires dd { margin: 0; font-weight: 500; white-space: nowrap; }

.pied {
  background: var(--bleu-profond);
  color: #C6D5E4;
  padding: 48px 0;
  font-size: 0.88rem;
}
.pied__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px 40px;
}
.pied p { margin: 0; line-height: 1.8; }
.pied a { color: #fff; text-decoration: none; }
.pied a:hover { text-decoration: underline; }

.haut {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--papier);
  color: var(--bleu);
  box-shadow: inset 0 0 0 1px var(--bleu), 0 4px 14px rgba(18, 50, 82, 0.15);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition), color var(--transition);
  z-index: 40;
}
.haut--visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.haut:hover {
  background: var(--brume);
  color: var(--bleu-profond);
}

.nav__lien--actif { color: var(--bleu); font-weight: 600; }

.section,
.hero {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.est-visible {
  opacity: 1;
  transform: none;
}

/*MOBILE*/
@media (max-width: 900px) {
  .burger { display: flex; }

  .nav {
    position: fixed;
    inset: 76px 0 auto 0;
    background: var(--papier);
    border-bottom: 1px solid var(--bordure);
    padding: 16px 24px 28px;
    display: none;
  }
  .nav--ouvert { display: block; }

  .nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav li { border-bottom: 1px solid var(--bordure); }
  .nav li:last-child { border-bottom: 0; padding-top: 18px; }
  .nav a { display: block; padding: 14px 0; font-size: 1rem; }
  .nav .bouton { text-align: center; color: #fff; }

  .nav .sous-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    padding: 0 0 8px 16px;
    min-width: 0;
  }
  .nav .sous-menu a { padding: 12px 0; }
  .nav__item--sous > a::after { display: none; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .carte { padding: 24px; }
  .tarifs > div { flex-direction: column; gap: 4px; }
  .tarifs dd { align-self: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .section,
  .hero {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}