/* Feuille de style produit — sobre, B2B, sans framework, sans JavaScript. */

:root {
  --ardoise-900: #16212e;
  --ardoise-800: #1f2d3d;
  --ardoise-700: #2c3e52;
  --ardoise-500: #4a6379;
  --ardoise-300: #8fa3b5;
  --ardoise-100: #e4eaf0;
  --ardoise-050: #f4f7fa;
  --blanc: #ffffff;
  --accent: #2f5d8a;
  --accent-fonce: #234563;
  --texte: #1d2a36;
  --texte-doux: #4c5c6b;
  --bordure: #d7e0e8;
  --rayon: 8px;
  --max: 1100px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--texte);
  background: var(--blanc);
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

h1, h2, h3 { line-height: 1.25; color: var(--ardoise-900); font-weight: 650; }
h1 { font-size: 2rem; margin: 0 0 .5rem; }
h2 { font-size: 1.5rem; margin: 0 0 1rem; }
h3 { font-size: 1.15rem; margin: 0 0 .4rem; }

a { color: var(--accent); }
a:hover { color: var(--accent-fonce); }

p { margin: 0 0 1rem; }

/* --- En-tête --- */
.site-header {
  background: var(--ardoise-900);
  color: var(--blanc);
  border-bottom: 1px solid var(--ardoise-800);
}
.header-inner {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { font-weight: 650; letter-spacing: .01em; }
.brand .sep { margin: 0 .5rem; color: var(--ardoise-300); }
.brand-produit { color: var(--ardoise-100); font-weight: 400; }
.site-nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.site-nav a { color: var(--ardoise-100); text-decoration: none; font-size: .95rem; }
.site-nav a:hover { color: var(--blanc); text-decoration: underline; }

/* --- Hero --- */
.hero {
  background: linear-gradient(180deg, var(--ardoise-050), var(--blanc));
  border-bottom: 1px solid var(--bordure);
  padding: 48px 0 40px;
}
.hero h1 { font-size: 2.1rem; }
.tagline { font-size: 1.2rem; color: var(--texte-doux); max-width: 60ch; }
.cible { color: var(--texte-doux); max-width: 65ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.4rem; }

/* --- Boutons --- */
.btn {
  display: inline-block;
  padding: .7rem 1.3rem;
  border-radius: var(--rayon);
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--accent);
  transition: background-color .15s ease, color .15s ease;
}
.btn-primary { background: var(--accent); color: var(--blanc); }
.btn-primary:hover { background: var(--accent-fonce); border-color: var(--accent-fonce); color: var(--blanc); }
.btn-ghost { background: var(--blanc); color: var(--accent); }
.btn-ghost:hover { background: var(--ardoise-050); color: var(--accent-fonce); }

/* --- Sections --- */
.section { padding: 44px 0; }
.section-alt { background: var(--ardoise-050); border-top: 1px solid var(--bordure); border-bottom: 1px solid var(--bordure); }
.lead { font-size: 1.05rem; color: var(--texte-doux); max-width: 70ch; }

.puces { margin: 0 0 1rem; padding-left: 1.2rem; }
.puces li { margin-bottom: .45rem; }

/* --- Grille de fonctionnalités --- */
.grille {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 1.5rem;
}
.fonction {
  background: var(--blanc);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 18px 20px;
}
.fonction h3 { margin-bottom: .3rem; }
.fonction p { margin: 0; color: var(--texte-doux); font-size: .96rem; }

/* --- Technique --- */
.tech { margin: 0; display: grid; grid-template-columns: 1fr; gap: .2rem 1rem; }
.tech dt { font-weight: 650; color: var(--ardoise-800); }
.tech dd { margin: 0 0 .9rem; color: var(--texte-doux); }

/* --- Prix --- */
.prix-cartes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 1.2rem;
}
.carte {
  background: var(--blanc);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.carte-principale { border-color: var(--accent); border-width: 2px; }
.montant { font-size: 1.8rem; font-weight: 700; color: var(--ardoise-900); margin: .2rem 0 .3rem; }
.libelle { color: var(--texte-doux); font-size: .95rem; }
.carte .puces { flex: 1 1 auto; }
.mention-paiement { margin-top: 1.2rem; font-size: .92rem; color: var(--texte-doux); }

/* --- FAQ --- */
details {
  background: var(--blanc);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 14px 18px;
  margin-bottom: 10px;
}
details[open] { border-color: var(--ardoise-300); }
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ardoise-800);
  list-style: none;
}
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; display: inline-block; width: 1.1em; color: var(--accent); font-weight: 700; }
details[open] summary::before { content: "\2013"; }
details p { margin: .7rem 0 0; color: var(--texte-doux); }

.note-ia { font-size: .92rem; color: var(--texte-doux); max-width: 70ch; }

/* --- Pied de page --- */
.site-footer {
  background: var(--ardoise-900);
  color: var(--ardoise-100);
  padding: 28px 0;
  font-size: .92rem;
}
.site-footer p { margin: 0 0 .4rem; }
.site-footer a { color: var(--blanc); }
.liens-legaux { display: flex; flex-wrap: wrap; gap: 1rem; }
.origine { color: var(--ardoise-300); }

/* --- Pages légales --- */
.prose { max-width: 78ch; }
.prose h1 { margin-bottom: 1.2rem; }
.prose h2 { margin-top: 2rem; font-size: 1.25rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: .5rem; }

/* --- Écrans larges --- */
@media (min-width: 640px) {
  .header-inner { flex-direction: row; align-items: center; justify-content: space-between; gap: 1.5rem; }
  .hero { padding: 72px 0 60px; }
  .hero h1 { font-size: 2.6rem; }
  .grille { grid-template-columns: repeat(2, 1fr); }
  .prix-cartes { grid-template-columns: repeat(2, 1fr); }
  .tech { grid-template-columns: 180px 1fr; }
  .tech dd { margin-bottom: .4rem; }
}

@media (min-width: 960px) {
  .grille { grid-template-columns: repeat(3, 1fr); }
  .section { padding: 60px 0; }
}

@media print {
  .site-header, .site-nav, .hero-actions { display: none; }
  body { font-size: 12pt; color: #000; }
}