:root {
  --fond: #f5f6f8;
  --surface: #ffffff;
  --texte: #16181d;
  --discret: #5d6471;
  --ligne: #e2e5ea;
  --bleu: #1f6feb;
  --bleu-clair: #e8f0fe;
  --sur-bleu: #ffffff;
  --rayon: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #111317;
    --surface: #1b1e24;
    --texte: #e9ebef;
    --discret: #9aa1ad;
    --ligne: #2c3038;
    --bleu: #4d8ff5;
    --bleu-clair: #1a2a44;
    --sur-bleu: #0b1220;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--texte);
  background: var(--fond);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bleu); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }

.largeur { max-width: 70rem; margin: 0 auto; padding: 0 1rem; }
.etroit { max-width: 46rem; }

/* En-tête */
.entete {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ligne);
}
.entete-ligne { display: flex; align-items: center; gap: 1.5rem; min-height: 3.75rem; flex-wrap: wrap; }
.marque { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.2rem; color: var(--texte); text-decoration: none; }
.marque img { border-radius: 9px; }
.menu { display: flex; gap: 1.25rem; flex: 1; }
.menu a { color: var(--discret); text-decoration: none; font-weight: 500; }
.menu a:hover { color: var(--texte); }
.langues { display: flex; gap: .2rem; font-size: .9rem; margin-left: auto; }
.langues a, .langues span { padding: .2rem .5rem; border-radius: 6px; text-decoration: none; color: var(--discret); }
.langues span { background: var(--bleu-clair); color: var(--bleu); font-weight: 600; }
.langues a:hover { color: var(--texte); }

/* Sections */
.bloc { padding: 4.5rem 0; }
.alterne { background: var(--surface); border-block: 1px solid var(--ligne); }
.surtitre { color: var(--bleu); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; font-size: .85rem; margin: 0 0 .6rem; }
.intro, .chapo { color: var(--discret); max-width: 44rem; }
.chapo { font-size: 1.2rem; }
.note { color: var(--discret); font-size: .95rem; }

.accroche { padding: 4rem 0 3rem; }
.accroche-grille { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; align-items: center; }
.atouts { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; color: var(--discret); font-size: .95rem; }
.atouts li::before { content: "✓ "; color: var(--bleu); font-weight: 700; }

.ecran { margin: 0; justify-self: center; max-width: 300px; }
.ecran img { border-radius: 28px; border: 8px solid #1d2026; box-shadow: 0 20px 50px rgb(0 0 0 / .18); }

.boutons { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.75rem; }
.bouton {
  display: inline-block; padding: .75rem 1.3rem; border-radius: 10px;
  border: 1px solid var(--ligne); background: var(--surface); color: var(--texte);
  font-weight: 600; text-decoration: none;
}
.bouton:hover { border-color: var(--bleu); }
.bouton.principal { background: var(--bleu); border-color: var(--bleu); color: var(--sur-bleu); }

.cartes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: 2rem; }
.carte {
  display: block; padding: 1.5rem; border-radius: var(--rayon);
  background: var(--surface); border: 1px solid var(--ligne);
  color: inherit; text-decoration: none;
}
a.carte:hover { border-color: var(--bleu); }
.carte p { margin: 0; color: var(--discret); }
.alterne .carte { background: var(--fond); }
.pastille { display: inline-block; font-size: .8rem; font-weight: 600; color: var(--bleu); background: var(--bleu-clair); padding: .15rem .6rem; border-radius: 99px; margin-bottom: .8rem; }

.detail { display: grid; grid-template-columns: 1fr 1.4fr; gap: 3.5rem; align-items: center; }
.coches { list-style: none; padding: 0; margin: 1rem 0; }
.coches li { position: relative; padding-left: 1.7rem; margin: .45rem 0; }
.coches li::before { content: "✓"; position: absolute; left: 0; color: var(--bleu); font-weight: 700; }
.deux-colonnes { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2.5rem; margin: 1rem 0 1.5rem; }

.offres { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: 2rem; align-items: start; }
.offre { padding: 1.75rem; border-radius: var(--rayon); background: var(--surface); border: 1px solid var(--ligne); }
.offre.mise-en-avant { border: 2px solid var(--bleu); }
.prix { font-size: 1.9rem; font-weight: 700; margin: 0 0 .5rem; }
.prix small { font-size: 1rem; font-weight: 500; color: var(--discret); }

.telechargements { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.lien-store {
  display: flex; flex-direction: column; min-width: 10rem; padding: .9rem 1.2rem;
  border-radius: 12px; border: 1px solid var(--ligne); background: var(--fond);
  color: var(--texte); text-decoration: none;
}
.lien-store small { color: var(--discret); }
.lien-store.bientot { opacity: .75; cursor: default; }
a.lien-store:hover { border-color: var(--bleu); }

details { border-bottom: 1px solid var(--ligne); padding: 1rem 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--discret); margin: .6rem 0 0; }

.texte-long h2 { font-size: 1.3rem; margin-top: 2rem; }

.pied { padding: 2rem 0 3rem; color: var(--discret); font-size: .92rem; }
.pied-ligne { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.pied nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.pied a { color: var(--discret); }

@media (max-width: 860px) {
  .menu { display: none; }
  .accroche-grille, .detail { grid-template-columns: 1fr; gap: 2.5rem; }
  .detail .ecran { order: 2; }
  .cartes, .offres, .deux-colonnes { grid-template-columns: 1fr; }
  .ecran { max-width: 240px; }
  .bloc { padding: 3rem 0; }
}