:root{
  --encre:#16303f;
  --encre-douce:#4b6472;
  --eau:#4f9d86;
  --eau-pale:#e3f0ea;
  --fond:#f7faf8;
  --carte:#ffffff;
  --filet:#dde7e2;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--fond);
  color:var(--encre);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.68;
  -webkit-text-size-adjust:100%;
}
h1,h2,.logo__nom,.nav-sections{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
p{margin:0 0 1.05em}
img{max-width:100%;height:auto;display:block}

.entete{
  position:sticky;top:0;z-index:20;
  background:rgba(247,250,248,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--filet);
}
.entete__interieur{
  max-width:1060px;margin:0 auto;padding:10px 16px;
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:inherit}
.logo img{width:34px;height:34px;border-radius:9px}
.logo__nom{font-weight:900;font-size:1.02rem;letter-spacing:.01em}
.nav-sections{
  display:flex;gap:6px;margin-left:auto;
  overflow-x:auto;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  max-width:100%;
}
.nav-sections::-webkit-scrollbar{display:none}
.nav-sections__lien{
  white-space:nowrap;text-decoration:none;color:var(--encre-douce);
  font-size:.79rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;
  padding:7px 12px;border-radius:999px;
}
.nav-sections__lien:hover{background:var(--eau-pale);color:var(--encre)}
.nav-sections__lien--actif{background:var(--eau);color:#fff}

.hero{
  position:relative;
  min-height:clamp(200px,35vh,280px);
  display:flex;align-items:center;
  background:linear-gradient(90deg,rgba(13,32,41,.72) 0%,rgba(13,32,41,.48) 100%),url("../visuels/port.jpg") center/cover;
}
.hero__bloc{
  position:relative;z-index:2;
  max-width:1060px;margin:0 auto;padding:24px 16px;width:100%;
}
h1{
  color:#fff;margin:0;max-width:25ch;
  font-size:clamp(1.35rem,3.2vw,2rem);
  line-height:1.22;font-weight:900;letter-spacing:-.015em;
  text-wrap:balance;
}

.contenu{max-width:1060px;margin:0 auto;padding:0 16px 56px}
.accroche{
  background:var(--carte);border:1px solid var(--filet);border-radius:18px;
  margin:28px 0 42px;padding:24px 24px 12px;
  position:relative;z-index:3;
  box-shadow:0 8px 24px -18px rgba(22,48,63,.4);
  font-size:1.05rem;color:#24404f;
}
.accroche p:first-child::first-letter{font-size:1.5em;font-weight:700;color:var(--eau)}

.partie{margin:0 0 48px;scroll-margin-top:72px}
h2{
  font-size:clamp(1.22rem,2.9vw,1.6rem);line-height:1.26;font-weight:900;
  margin:0 0 6px;letter-spacing:-.01em;text-wrap:balance;
}
.partie__num{
  display:block;font-size:.73rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--eau);margin-bottom:6px;
}

.grille-options{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px;
}
.option{
  background:var(--carte);border:1px solid var(--filet);border-radius:18px;
  padding:22px 18px;display:flex;flex-direction:column;gap:8px;
  box-shadow:0 4px 16px -14px rgba(22,48,63,.3);
}
.option h3{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:1.08rem;font-weight:700;margin:0;color:var(--encre);line-height:1.3;
}
.option p{font-size:0.95rem;margin:0;color:#2a4a54}
.option__prix{
  font-weight:700;color:var(--eau);font-size:1.02rem;margin-top:4px;
}

.partie__grille{display:grid;gap:22px;align-items:start}
@media(min-width:760px){
  .partie__grille{grid-template-columns:1fr 1.1fr;gap:32px;align-items:center}
  .partie--inverse .partie__grille>.photo{order:-1}
}
.photo{border-radius:18px;overflow:hidden;background:var(--eau-pale)}
.photo img{width:100%;height:auto;display:block}

.reperes{
  list-style:none;margin:0 0 1.05em;padding:0;
}
.reperes li{position:relative;padding:0 0 0 20px;margin-bottom:9px;color:#25424f;font-size:0.96rem}
.reperes li::before{
  content:"";position:absolute;left:2px;top:.65em;
  width:6px;height:6px;border-radius:50%;background:var(--eau);
}
.chiffre{
  display:inline-block;background:var(--eau-pale);border-radius:6px;
  padding:2px 8px;font-weight:700;color:#1d5c4c;font-size:0.96rem;
}
a{color:#1d5c4c;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--eau)}

.pied{border-top:1px solid var(--filet);background:#fff}
.pied__interieur{max-width:1060px;margin:0 auto;padding:24px 16px}
.pied__plan{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;
  margin-bottom:18px;
}
.pied__plan a{
  font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;
  text-decoration:none;color:var(--encre);padding:8px 10px;
  border-radius:6px;transition:background .2s;
}
.pied__plan a:hover{background:var(--eau-pale)}
.pied__description{
  font-size:.85rem;color:var(--encre);margin:0 0 14px;line-height:1.5;
}
.pied__mention{
  font-size:.79rem;color:var(--encre-douce);margin:0;
}
@media(max-width:519px){
  .entete__interieur{gap:10px}
  .nav-sections{margin-left:0;width:100%;order:3}
  .accroche{padding:20px 18px 9px;border-radius:15px;font-size:1rem}
  .grille-options{grid-template-columns:1fr}
  .partie__grille{grid-template-columns:1fr!important}
  .partie--inverse .partie__grille>.photo{order:0}
}